Ridgid 300 Pipe Threader: Enhancing Productivity - Toolup

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RIDGID 300 Pipe Threader: Enhancing Productivity with Unmatched Performance

Pipe threading is a critical process in plumbing, mining, heavy industrial applications, and more industries. It ensures secure and reliable connections between pipes, allowing for efficient fluid or gas flow and preventing leaks.

The RIDGID 300 Complete Threading Machines offer advanced features and capabilities for professional pipe threading. There are two different models () and (), with the spindle speed being the differing factor.

Before making a purchase, it's crucial to consider factors such as the size of the threader, the types of threads it can handle (such as NPT, BSPT, or metric threads), overall quality, warranty, and the availability of replacement parts. Additionally, understanding the specific needs of your project, including the pipe diameter, material, and threading specifications, will help you decide whether the RIDGID 300 pipe threader machine is what you need.

Learn about the RIDGID 300 Complete Threading Machines in under 1 minute with this video:

This article will focus on the two RIDGID 300 pipe threader models and provide a comprehensive comparison. We will discuss their key features and differences, specifications, and suitability for various applications.

Let's dive in and find the perfect pipe threader to elevate your project to new heights.

What is the RIDGID 300 Pipe Threading Machine

The RIDGID Model 300 Power Drive Complete is a motorized pipe threader designed to simplify creating threads on pipes. Its primary purpose is to prepare pipes for assembly by creating threaded ends, enabling secure connections, and preventing leakage.

This powerful machine can handle a wide range of pipe sizes, from 1/8 inch to 2 inches in diameter, and can thread pipes made of various materials, including steel, stainless steel, and plastic.

The Model 300 Power Drive Complete incorporates advanced features to enhance efficiency and ease of use. Equipped with a high-torque motor, it creates threads and grooves on the ends of pipes, similar to the threading found on a screw. This allows workers to connect pipes to connectors or couplings securely. The threaded ends of the pipe interlock with the threads on the coupling, creating a sturdy and durable connection. The motor's high torque ensures clean and accurate thread cutting.

Watch this short video on how to thread pipe with the RIDGID 300.

The tool also includes a reversible direction switch, eliminating the need for complex adjustments when threading both right-handed and left-handed pipes. This time-saving feature simplifies the threading process and improves overall efficiency.

In terms of setup and mobility, the Model 300 Power Drive Complete offers convenience. Its compact and portable frame allows for easy transportation between job sites. The tool can be securely mounted on a sturdy workbench or used with a compatible RIDGID tripod for stability during operation.

Overall, the RIDGID Model 300 Power Drive Complete is a reliable and versatile pipe threader that streamlines the threading process.

The History of RIDGID Pipe Threading

In , the pipe threading industry experienced a significant breakthrough when Ridge Tool Company introduced the RIDGID 400 Power Drive. This electric portable power drive revolutionized the slow and tedious hand threading process, providing a much-needed boost to efficiency and productivity.

The RIDGID Model 500 Threading Machine, introduced in , revolutionized pipe threading operations by combining cutting, reaming, and threading capabilities into a versatile unit. Building on its success, the Model 535 Pipe and Bolt Threading Machine, launched in , set the industry standard with its patented RIDGID Speedchuck, offering a secure grip on materials.

The RIDGID 300 was introduced in , further improving pipe threading operations. This machine simplified threading, reaming, and cutting tasks while providing a lightweight and portable solution. It could be easily mounted on a truck or stand, offering convenience and flexibility for professionals working on various projects.

Bezz from the United Kingdom said,  “I've used RIDGID 300s since the first days of my apprenticeship, beginning in . These machines are truly wonderful, easy to use and extremely robust. Whatever you throw at them, they shrug it off. Dependable and powerful, the 300 is just perfect for all pipework requirements. I've had the misfortune to use "other" makes that look suspiciously alike the 300 and there is no comparison. The 300 is a true masterpiece, copied by some, rivalled by none.”

Over the years, the iconic RIDGID 300 has undergone updates while steadfastly maintaining its position as a standard in the plumbing industry.

These advancements demonstrate the industry's commitment to improving performance, efficiency, and user experience. With various innovative tools, pipe threading operations are significantly simplified, contributing to professionals' success.

RIDGID 300 Pipe Threader Model Differences: Exploring the Variations

The RIDGID 300 COMPLETE series offers a range of options tailored to meet specific requirements. Among these options, the RIDGID 300 complete (38 RPM) Pipe Threading Machine and the RIDGID 300 complete (57 RPM) Pipe Threading Machine stand out as two distinct models.

While both machines share the reliability and efficiency associated with the RIDGID brand, their rotational speed capabilities differ, which can significantly impact productivity and the types of applications they excel in.

This section will explore the differences between these two models, shedding light on their strengths and what is included within the package.

Check out this How To video provided by RIDGID to get an overview perspective:

What's included with the Model 300

1. 300 Power Drive with Foot Switch
2. Set 1/2" - 3/4" Universal Alloy Dies
3. Set 1" - 2" Universal Alloy Dies
4. 311 Carriage with Lever
5. 811A Universal Die Head
6. 32 Transporter
7. Removable Tray
8. Stand
9. Reamer
10. 360 Cutter
11. 418 Oiler

Key Differences

The differences between the RIDGID 300 COMPLETE (57 RPM) Pipe Threading Machine and the RIDGID 300 COMPLETE (38 RPM) Pipe Threading Machine are:

1. RPM (Rotations Per Minute): The RIDGID operates faster with a rotational speed of 57 RPM, while the RIDGID operates at a slightly slower speed with a rotational speed of 38 RPM. This difference in RPM can impact the rate of pipe threading operations and die lifespan. Depending on the material used, the pace should be slower or faster.
2. ROD Threading Capacity:There is a slight difference in thread pulling capacity shown below
   1. The RIDGID : in. ¼ - 1 ½
   2. The RIDGID : in. ¼ - 2

To understand the differences, consider watching this video on threading steel pipe with a RIDGID 300 power drive machine.

Considering these differences and evaluating your requirements is important to determine which machine suits your pipe threading needs better.

RIDGID Model 300 Threader (57 RPM)

 The RIDGID (57 RPM) Pipe Threader Machine  , with its high rotational speed of 57 RPM, offers several advantages for faster threading tasks. This machine is designed with precision and versatility to handle pipes of various sizes and materials, making it suitable for a wide range of industrial and construction applications.

The 57 RPM option is particularly beneficial in time-sensitive projects with tight deadlines. The faster RPM significantly reduces the time required to complete the pipe threading.

The higher RPM proves invaluable when dealing with a large volume of pipes, such as in industrial applications or large-scale plumbing projects. It expedites the threading process, allowing more pipes to be threaded within a given time frame. This increased productivity not only saves time but also reduces labor costs.

IMPORTANT

However, it's important to note that while the higher rotational speed of 57 RPM expedites operations, it also means that the dies used in the threading process may have a shorter lifespan. The increased speed tends to wear out the dies quicker, necessitating more frequent replacements. This consideration should be considered when evaluating the machine's cost-effectiveness and overall maintenance requirements.

The 57 RPM option is compatible with softer pipe materials like plastic or non-ferrous metals. The faster rotation helps prevent these materials from melting or deforming during the threading process. It ensures clean and accurate threads, maintaining the integrity of the pipes.

RIDGID Features

And it also includes:

1. RIDGID speed chuck
2. Reversible 1/2 HP universal motor
3. Recessed On/Off/Reverse switch
4. CSA approved
5. Approved to UL standards (  NRTL  )

RIDGID Specifications

Motor 1/2 HP, universal, reversible motor, single-phase Volts 115V, 25-60HZ Weight

1. LBS: 218
2. KG: 96.2

Switch Heavy-duty FOR/OFF/REV and Integral Foot Switch Chuck RIDGID speed chuck with replaceable rocker-action jaws Spindle Speed 57 RPM Pipe Threading Capacity 1/8" - 2" (3-50 mm) Rod Threading Capacity 1/4" - 1" - 1/2" (6-40 mm) Max Geared Threader Capacity 6" (150 mm)

RIDGID Model 300 Threader (38 RPM)

The Ridgid 300 pipe threader also offers a lower RPM option of 38, which proves advantageous in specific circumstances where precision and control are prioritized. Let's explore these scenarios further:

When working with harder pipe materials like steel or stainless steel, a slower RPM of 38 is often preferred. Slower rotation allows for more controlled cutting, reducing the risk of overheating, chatter or damaging the pipe's integrity. This lower speed ensures that precision and accuracy are maintained during the threading process, resulting in clean and precise threads.

Certain delicate or thin-walled pipes require a more careful approach to avoid damage. The slower RPM of 38 gives the operator greater threading control in such cases. This controlled rotation minimizes the risk of cracking, denting, or damaging the surface of the pipe.

A slower RPM is favored for optimal results if you are threading tapered pipe threads, such as NPT (National Pipe Taper) threads. The gradual engagement of the threads is crucial to ensure a tight and secure fit between the threaded components. The slower rotation speed of 38 RPM allows the operator to carefully engage the threads, creating a reliable and leak-free connection.

The lower RPM option of 38 for the Ridgid 300 pipe threader proves beneficial when precision, control, and the pipe's integrity are paramount. Whether working with harder materials, delicate pipes, or tapered threads, the slower rotation speed ensures accurate threading and minimizes the risk of damage or compromised connections.

RIDGID Features

1. Heavy-Duty Proven Performance
2. Lightweight, Portable Design, Fast Transport, and Set
3. Self-Contained Oil System with adjustable flow control
4. Versatility for Threading and Grooving
5. Quiet Operation

RIDGID Specifications

Motor 1/2 HP, Universal, reversible single-phase HZ 25-60, 115V Capacity 1/8" - 2" Switch Recessed On/Off/Reverse

Applications for the Model 300 Threader

The RIDGID 300 (57 RPM) Pipe Threading Machine and the RIDGID 300 (38 RPM) Pipe Threading Machine can be used in various applications. Here are some specific examples of where each machine may be suitable:

RIDGID 300 COMPLETE (57 RPM) Pipe Threading Machine:

1. Industrial Pipe Threading: This machine's higher RPM makes it well-suited for industrial pipe threading applications where efficiency and faster operation are crucial. It can handle threading tasks on larger-diameter pipes and tough materials.
2. Construction Projects: The higher RPM of this machine makes it ideal for construction projects that involve pipe installations, such as plumbing, HVAC systems, and sprinkler systems. It can help complete threading tasks swiftly and meet project deadlines.
3. Pipe Fabrication: The RIDGID , with its impressive RPM capability, enhances efficiency and productivity in workshops and manufacturing environments. Meticulous attention to detail is vital throughout the fabrication process, and by leveraging the faster RPM, fabricators can seamlessly execute intricate tasks, delivering superior results.

RIDGID 300 COMPLETE (38 RPM) Pipe Threading Machine:

1. General Plumbing: This machine's slightly lower RPM suits general plumbing tasks, such as residential or commercial pipe threading for water supply lines, drain lines, and smaller-diameter pipes. It provides sufficient speed and control for most standard plumbing applications.
2. Maintenance and Repair: When performing maintenance and repair work involving pipe threading, the RIDGID can handle tasks precisely. It is well-suited for applications where a more controlled and slower threading speed is desired.
3. Small-Scale Projects: If you are working on smaller-scale projects that involve pipe threading, such as home renovations or small plumbing repairs, the RIDGID can offer adequate performance and versatility.

These applications serve as examples, and the choice of machine ultimately depends on factors like pipe size, material, project requirements, and personal preference. It's always recommended to review the manufacturer's guidelines and consult with professionals to determine the most suitable machine for your specific application.

RIDGID 300 Threader Accessories

RIDGID 300 Threader Accessories offer additional functionalities and convenience to enhance the performance of both the RIDGID 300 Power Drive Complete models. Let's look closer at two specific accessories: the RIDGID Oiler with 1 Gallon Nu-Clear Thread Cutting Oil and the RIDGID 811A Universal Quick Opening Right Hand Oiling Die Head.

The RIDGID Oiler is designed to provide lubrication for the threading process, ensuring smoother and more efficient operation.

It includes a hand-operated oiler that offers 50% more oil per stroke compared to other handheld oilers, resulting in longer die life.

The ergonomic 2-finger trigger design reduces user fatigue during extended use, and the die-cast heavy-duty body with a swivel nozzle and no exposed parts contributes to the product's durability.

Additionally, the oiler features a reservoir with a removable chip tray, a 54" hose, and a fastenerless twist and lock drip pan that securely attaches to the reservoir. The new material used in the reservoir is resistant to abrasion, lighter than metal, and doesn't rust, ensuring its longevity and preventing leakage or cracking.

According to Plumbersmag.com, “Threading oil plays an extremely important role in producing a quality pipe thread. The best threading oils are those produced specifically for pipe threading applications. Unlike motor oils, which are designed specifically to lubricate the moving parts of an engine, threading oils are designed for lubricating the thread, cooling the cutting surface, and removing chips.”

The company is the world’s best Heavy duty model rod threading machine supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

The quick-opening feature allows for efficient switching between different sizes of dies, saving time and effort. The die head includes a throwout lever that can be manually flipped to retract the dies once the desired thread length is cut.

With a bolt capacity ranging from 1/4" to 2" and a pipe capacity from 1/8" to 2", this die head accommodates a wide range of applications. The universal compatibility and oil-through head design further enhance its usability.

Both of these accessories, the RIDGID Oiler and the RIDGID 811A Universal Quick Opening Right Hand Oiling Die Head, contribute to the overall efficiency, convenience, and versatility of both of the RIDGID 300 Power Drive Complete models.

These accessories enable smoother threading operations, reduced downtime for die changes, and enhanced durability, making them valuable additions to the RIDGID 300 threading system.

Key Takeaways

RIDGID 300 Pipe Threaders offer superior performance in pipe threading, providing a reliable and secure connection for fixing drainage lines and replacing equipment.

RIDGID's rich history of innovation backs these threaders. The RIDGID operates at a faster RPM of 57, while the RIDGID operates at an RPM of 38, and both are suitable for general plumbing and maintenance tasks. Accessories such as cutting oil and die sets are available to enhance precision. Choose the right threader and accessories for successful pipe threading.

RIDGID 300 Pipe Threader Frequently Asked Questions:

Thread Sizes

The Handy-Thread machine is ruggedly constructed, and fully adjustable in every way. The standard machine will cut or roll threads from 1/8" through 5/8" N.C., N.F., or 16mm with the proper heads.

Electrical Requirements

The standard non-reversing machine uses a 1-1/2 HP, RPM, 115 volt, 60 Hz, single-phase electric motor with 3-prong grounded plug. It should be plugged into a 3 prong grounded receptacle with 20-ampere capacity on 115 volts.

Compressed Air Supply

The standard machine requires a compressed air supply of 85 PSI minimum gauge pressure, with a flow capacity of about 1/2 SCFM (standard cubic feet per minute). If no compressed air is available in the plant, or a stand alone unit is desired, a small air compressor of 1/2 HP which will deliver at least 85 PSI should be adequate for most jobs. The compressor should be used with a receiver (storage tank) of 10 to 30 gallons capacity.

Cutting Fluid or Coolant

Modern chemistry is developing many new and improved cutting fluids. Contact your local supplier of cutting tools if you have no special source for purchasing cutting fluid. The fluid should have a viscosity of no higher than 200 SSU (rated at 100°F). A minimum of 5 quarts and a maximum of 8 quarts is required in the Handy-Thread reservoir. When filling the reservoir, pour the fluid into the chip pan. It will drain through the chip screen into the reservoir.

Caution! Do not mix cutting fluids of different kinds because of the possibility of forming gums which will clog the pump, the coolant tube, or die head.

If the fluid discharge tube should become clogged it can usually be cleared with a blow gun without removing it from the machine. Blow backward through the tube. If necessary to remove it for cleaning, unscrew the pipe where it comes out of the machine base plate and pull the tube out.

Caution! Running the pump without cutting fluid may damage it. If fluid is not desired for threading certain materials, turn the pump off with the selector switch on the electric control box.

If the cutting fluid is too thick (viscosity too high), the pump may have difficulty in picking it up when the machine is first started and the fluid is cold. This may happen even with thinner fluids in cold weather.

Caution! Do not use flammable or aromatic solvents to thin the cutting fluid because of the danger of fire.

Remove/Install Die Head

To install or remove a complete die head, remove cutting fluid guard and loosen (about 2 turns) the socket set screw(s) in the spindle behind the die head. Move the die yoke latch bar to the right and lift the bronze die yoke out of its groove in the die head. The die head is now ready to be removed by pulling it toward the operator. Do not hammer on the die head if it is tight; drive a thin wedge or screwdriver between the die head and the spindle.

Some die heads have die blocks which can easily be removed while the die head remains in the machine. This allows a quick change of thread size or thread lead. Consult the instruction manual for your particular brand of die head and proceed accordingly.

To re-install the die head, slip the shank into the spindle hole. Be sure the flat on the die head shank is exactly in the center under the spindle set screw(s). Tap the die head lightly with a soft hammer until its base seats against the end of the spindle, then tighten the remaining set screw(s) in the spindle, drop the die yoke into its slot, pull the yoke latch bar to the left, and re-mount the cutting fluid guard. Next, select the proper size rod guide bushing which mounts on the carriage plate and twist 1/8th turn clockwise. The rod guide bushings are about 1/32" larger than the diameter of the rod to be threaded.

Next, unscrew the collet retaining nut on the air chuck and remove the collet. Install a collet for the size rod to be threaded, re-assemble the collet retaining nut, and tighten.

Cutting Single Threads

For threading only one end of a rod, or for threading the same length on opposite ends of the same rod, first make sure there is at least 85 PSI air pressure showing on the gauge. If pressure is low, raise it with the pressure regulator located beneath the electrical control box. Turn the "Alt-Cont-#1" selector switch to its No. 1 (right) position. The indicator light located inside the selector switch should light. Set the right switch cam (the one on the longer switch bar) to the desired thread length by reading the scale at the front (operator) end of the switch bar. Tighten the knurled cam knob finger tight. If threading a material which requires cutting fluid or coolant, turn on the pump selector switch and wait until fluid begins to flow. Adjust the position of the fluid tube to direct the full stream of fluid onto the rod just before it enters the die.

Insert the rod to be threaded through the rod guide bushing and collet, stopping it against the swing stop arm. Gently push the carriage toward the die head. Do not bump the rod into the die head because it may chip the chasers.

After engaging the rod into the die head about 1/8", the rod will be pulled along by the die until the switch cam is contacted, at which time the die head will be automatically opened by the die head air cylinder.

Caution! Do not start to thread unless there is at least 85 PSI air pressure. The gauge is mounted on the collet air valve. Without sufficient air pressure the collet will not clamp the rod securely, and the die head will not open when the switch cam is actuated. If, after starting to thread, you discover the air pressure to be less than 85 PSI, turn off the electric motor as quickly as possible to prevent the collet from jamming into the die head. Use the "Stop" push button on the control box.

Note: For threading rods which are shorter than about 7" long, the rods must be inserted into the collet from the opposite side. In this case the rod guide bushings and the swing stop assembly are not used. The accessory twist-on stop rod assembly (furnished with each Handy-Thread machine) is inserted in place of the rod guide bushing, and adjusted to provide a stop of the proper depth as the rod is inserted into the collet. Rods as short as 1" long can be threaded in this way. The swing stop assembly may be left in place while threading short rods, or if a large number of short rods are to be threaded, the complete swing stop assembly can be taken off by loosening the two socket head screws on the top of the stop rod bracket.

In using the accessory twist-on rod stop assembly, the measuring rules on the switch bar will not be usable. A trial cut will have to be made, and if the thread length is too short, the switch cam will have to be re-set for a slightly longer thread. After a little experience the correct length will be produced on the first or second trial.

Alternate Threading

Alternate threading is the cutting of threads on opposite ends of the same rod to different lengths. The machine can be set to alternately produce a shorter, then a longer thread. The operator can thread a rod on one end then withdraw it and re-insert the opposite end for a different length thread. To set the Handy-Thread machine for alternate threading, first turn the "Alt-Cont-#1" selector switch to its "Alt" (left) position. The indicator light will light only on every other carriage stroke. When it lights, the next thread length will be that set on the right switch bar cam, usually the longer thread length. Next, set the left switch bar cam for the shorter and the right switch bar cam for the longer thread length. As the machine comes from the factory, the shorter switch bar cam can be set for up to 3-1/2" and the right switch bar cam for up to 6" thread length.

Continuous Threading

Continuous threading is the cutting of threads longer than 6". To set the Handy-Thread machine for continuous threading, first turn the "Alt-Cont-#1" selector switch to its "Cont." (middle) position. During this mode only the right switch bar cam is active. When the length set on the right switch bar is reached the chuck is opened and the head remains closed. Caution: at this time the rod will spin, so provisions must be made to insure operator safety. When the carriage is returned to the neutral (back) position, the chuck will close on the part and allow an additional length of rod to be threaded. Continue to cycle the length of the rod you wish threaded. Just prior the last cycle of the desired threaded length, switch the "Alt-Cont-#1" switch to "#1" (left) position. When the right switch bar is reached this time, the head will open. Turn off the machine to stop the rotation of the head and to release the rod from the chuck. It is important to turn off the machine prior returning the carriage the neutral position to prevent damage to the threads. To determine the setting for the right switch bar, divide the length of the desired thread in to even cycles less than 6" (ie. to cut a 15.75" thread, set the switch bar to 5.25" and run for 3 cycles).

Handy-Thread Accessories

Standard accessories furnished with the Handy-Thread machine include five sizes of quick-change rod guide bushings, each with a hole slightly larger than the rod to be threaded. These bushings are for supporting the rod and guiding it into the collet. Also included is the accessory rod stop for use in threading very short rods. This stop is used in place of the swing stop for short rods, and twists on to the carriage plate.

The standard machine uses standard No. 11 collets. These are not furnished unless specified on your order. Round collets in increments of 1/64" in diameter from 1/8" through 13/16" are available from AAA Products. Larger rods, up to 1" in diameter, can be held by using an optional special collet sleeve, collet retaining nut, and using a standard No. 21 collet. For information contact the Jiffy Products Division of AAA Products International. Special collets to hold hex and square rods are also available from the factory.

Threading Speeds

The kind of material, its hardness, and its diameter will determine the maximum spindle RPM which can be used. The standard machine is assembled with motor and spindle pulleys to have a speed of 400 RPM on the spindle. This is a good speed for a wide range of threading jobs, for cold rolled (low carbon) steel up to 1/2" in diameter with the right cutting fluid. Larger rods of this material can usually be threaded at this speed although die chaser life may be reduced. However, on long production runs, spindle speed should be reduced on rods larger than 1/2" in diameter. It is quite important that the proper amount of the right cutting fluid be used and that it be directed on the rod as close as possible to the place where the material enters the die.

If rods of less than 3/8" diameter are to be threaded in quantity, the spindle speed can be increased by replacing the motor pulley with one of larger diameter. We recommend your die manufacturer be consulted for best surface speed of a particular material along with recommendations on lubricant or coolant.

For threading harder materials such as stainless steel or higher carbon steel, the spindle should be run at a slower speed. The standard pulley supplied on standard units may be replaced with an optional pulley. These are standard timing belt pulleys for a 1" wide belt, and can be purchased either from the factory or from a local power transmission dealer. It is unimportant to change the pulleys for a short run of small rods.

For best production rate the machine should be run, if possible, at the highest RPM or surface speed (SFM) recommended by the head manufacturer. When running at higher speeds, particularly on large diameter rods, or when threading harder materials, it is especially important to use the right amount of the right cutting fluid and to see that it is directed properly.

Changing Belt and/or Pulley

Remove the drive belt guard and loosen the belt tension adjusting knobs. Remove the belt and the motor pulley. Install the replacement pulley. Align the motor and spindle pulleys, then tighten the pulley screws. Install the belt, then adjust the belt tension knobs to produce a light tension on the belt. Install the belt guard. Caution! Do not operate the machine without the belt guard in place.

Handy-Thread Machine Adjustments

The Handy-Thread machine is built for long life and rugged daily use; the die head chasers are the only parts which may have to be replaced on a regular basis. The following simple adjustments may be required occasionally:

Air Pressure
The air line pressure should be adjusted until the air pressure gauge on top of the air clamp valve reads at least 85 PSI. This adjustment is made on the pressure regulator which is located under the electric control box. After setting the pressure, cycle the machine once without cutting threads, to be sure the pressure has stabilized.

Drop Stop
This is set at the factory 6-1/8" from the stop rod mounting bracket. The length of thread cut when the switch cams are set, can be varied about 1/8" plus or minus by loosening the two socket head cap head cap screws in the left side of the stop rod mounting bracket, then sliding the stop rod in or out until thread lengths cut on a test rod correspond to the length to which the switch cams are set on the switch bar rules.

Switch Bars
Each of the two switch bars can be adjusted to make the thread length longer or shorter by 1/16" each way. This is done by loosening the lock nuts on each end of the switch bars, then loosening one socket set screw and tightening the other. These 60° socket set screws should be set so there is no side movement or end play, but so the switch bar will rock freely; then tighten the lock nuts and check the movement again.

Die Head Adjustments
Refer to the die head instruction manual for the brand and model of the die head being used.

Note: When using water soluble cutting fluids, all die head models will require periodic disassembly, cleaning, and oiling to remove gum and rust. The need for cleaning will be obvious from the sluggish opening and closing of the die head.

Centering Die Head Horizontally on the Collet
If it should become necessary to re-center the die head on the collet in a horizontal direction, slightly loosen the four 1/2" hex head bolts which hold the main spindle bearing blocks to the machine base plate. Tap both bearings to the left or right as required.

The main spindle should measure parallel to the ball bushing rod so that when a straight rod is chucked in the collet it will hit the center of the die head when the carriage is pushed toward the die head. After making this adjustment, firmly tighten the four hex head bolts.

Centering Collet Vertically on the Die Head
Raising or lowering the collet so it will be in alignment with the die head is done with the two cams (upper and lower) which support the carriage plate. These are located near the operator, on the left side of the machine.

Recommended adjusting procedure is to take a headless bolt and screw it into the closed die until about 1" of its unthreaded end is protruding out of the die. Disconnect air pressure or unplug the electrical power so the collet will not close. Push the carriage forward and adjust the carriage support cams so the collet will slide freely over the headless bolt. Each cam is adjusted by slightly loosening the socket head cap screw going through its center, then rotating the 5/8" hex cam to the desired position. Tighten the screw while holding the cam to keep it from rotating. When properly adjusted, there should be no up and down play in the carriage.

Replacing an Electrical Limit Switch
There are three limit switches, and any one of them can be replaced by removing the four 1/4" socket head cap screws holding the switch assembly. The switching assembly can then be moved back and out from under the switch cam collar. Turn the switch assembly on its side to remove a switch. All switches are Omron switch No. Z-15GD55-B7-K.

When replacing a faulty limit switch, remove only one wire at a time. Connect this wire to the same terminal on the new switch before removing another wire.

The three limit switches can be identified as follows: the one mounted crosswise to the others operates the collet solenoid air valve (the one with a gauge mounted on it) and also re-cocks the die head through the double solenoid air valve. The switch next to it (in the middle) is actuated by the left switch cam bar. When actuated, it opens the die when thread length is reached, but is operative only when the "Alt-Cont-#1" selector switch on the control box is in its "Alt" (left) position for alternately threading to different lengths on opposite ends of the same rod. The third switch also opens the die when actuated. It opens the die on every threading operation when the "Alt-Cont-#1" switch is set in its No. 1 (right) position and on every other threading operation when the "Alt-Cont-#1" switch is set in its "Alt" (left) position.

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