Best Pipe Threading Machine 2026: RIDGID 300 & More

A pipe threading machine grips the pipe, turns it against cutting dies and cuts a tapered pipe thread (NPT in the US) on steel pipe. If you thread regularly, buy a bench power machine: the top pick here is the RIDGID 300, which RIDGID’s manual lists at 1/8 to 2 inch pipe, a 1/2 HP motor, 38 or 57 RPM and a foot switch. A hand-held power drive (RIDGID 690-I or 700) threads in place, and a RIDGID 12-R ratchet threader with a set of die heads is the toolbox option for a few joints a year. Whichever you buy, RIDGID’s manuals share the basics: cut and ream the pipe, use generous cutting oil, wear no gloves or loose clothing, and keep the pipe secured and supported. Our pipe vise and stand picks cover that part.

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Regular threading: see the RIDGID 300 Complete kit (15682) on Amazon →

A few times a year: see the RIDGID 12-R set on Amazon →

This is the narrowest page in our pro tools cluster — most homeowners will never touch a pipe threader. But if you work with black iron or galvanized steel pipe — gas lines, older water systems, some commercial and conduit work — cutting clean threads is the job, and there’s no shortcut. Here’s how to pick a threader without buying a power machine you’ll use twice.

Quick picks

• Best power threader (bench machine): RIDGID 300 Power Drive Complete kit (15682), 38 RPM →
• Best for occasional fittings: RIDGID 12-R ratchet threader set, 1/2″–2″ die heads →
• Best portable power option: RIDGID 690-I hand-held power drive kit with 1/2″–2″ die heads (third-party seller) →
• Smaller-die 12-R set: RIDGID 12-R exposed ratchet threader set, 1/2″–1-1/4″ dies →

Power vs. manual — decide this first

The honest split: if you thread pipe regularly — gas work, commercial, repeat steel jobs — buy a power machine; the time and effort it saves are large. If you cut threads a few times a year, a manual ratchet threader and a die set does the job with far less outlay and fits in a toolbox.

Pipe Threading Machine Types and What the Makers List

The first question is which kind of machine. There are three common kinds. Manual ratchet threaders (the RIDGID 12-R) use one die head per pipe size and a hand ratchet. Hand-held power drives (RIDGID 690-I and 700, or Milwaukee’s cordless M18 FUEL) turn the die head while you hold the drive against a support. Bench or floor machines (RIDGID 300, 535 and 1224; Wheeler-Rex 8090) grip the pipe and spin it against the die head. Here is what each maker’s own sheet says:

Sources: RIDGID’s 12-R sheet, 690-I manual, 700 manual, 300 manual, 535 page and 1224 manual; the Wheeler-Rex 8090 page and its parts and operations manual. The maker documents do not always agree, and the conflicts are noted here. The 300 manual lists the drive at 77 lb in its specifications and 94 lb in its catalog table; RIDGID’s web page also says 94 lb. Wheeler-Rex’s web page lists the 8090 at 166 lb net and its manual at 106 lb. For pipe capacity, RIDGID’s web page gives the 300 as 1/2 to 2 inch standard, while its manual lists 1/8 to 2 inch with the extra die sets.

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My picks, explained

Threading tips from the field

• Use cutting oil, generously. RIDGID’s 700 manual says a generous quantity of RIDGID Thread Cutting Oil lowers threading torque, improves thread quality and increases die life. Its 12-R sheet says a lubricating oil or a poor cutting oil gives a poor thread, leaky joints, short die life and high handle forces. Keep the oil flowing on the dies.
• Cut square first. RIDGID says a pipe cut at an angle can damage the dies or make the die head hard to start. Use a proper pipe cutter and ream the burr before you thread.
• Right depth, then stop. RIDGID says to stop when the end of the pipe is even with the edge of the dies; running on makes a straight thread, not a tapered one. Check the thread with a ring gauge (see below), because a thread that does not gauge can leak.
• Gas work = code work. Threading gas lines carries real safety and code obligations, and the manuals we read cover threading, not gas code. If you’re not certified and confident, this is a “hire it out” job — see the pillar’s rent-vs-buy/hire-it-out rule.

Dies, Die Heads and Thread Checks

• RIDGID 300: the 811A quick-opening head takes four die sets to cover 1/8 to 2 inch (1/8, 1/4–3/8, 1/2–3/4 and 1–2 inch) and comes in right- and left-hand versions; 1/8 inch dies are not made for the left-hand head. The 815A self-opening head is right-hand only and opens by itself when its trigger hits the end of the pipe. Bolt threading takes a separate set of dies for each bolt size.
• RIDGID 700 and 12-R: the 700 takes 12-R die heads (1/8 to 2 inch). RIDGID lists adapters for other heads: 770 for 00-R and 00-RB (bolt 1/4 to 1 inch), 771 for 0-R, 772 for 11-R and 773 for 111-R. The 700 manual says to use only RIDGID die heads with it. The 690-I takes 11-R heads.
• Other makers: Wheeler-Rex says its 8090 is interchangeable with Model 300 dies and die heads (a maker claim we did not test) and lists stainless dies as a separate part. Milwaukee lists its cordless threader as compatible with RIDGID 12-R and Reed R12+ heads.
• NPT dies and speed: RIDGID’s 535 page says NPT dies are for NPT die heads only and BSPT dies for BSPT heads, and to use high-speed dies on machines of 45 RPM or more. By that note, a 57 RPM 300 would want high-speed dies (our reading; the 300 manual we read does not say).
• Checking the thread: RIDGID’s preferred check is a thin ring gauge screwed on hand-tight; the pipe end should be flush with the gauge, plus or minus one turn. With no gauge, RIDGID’s 700 and 1224 manuals say a clean fitting should take 4 to 5 turns of hand-tight engagement on NPT threads up to 2 inch; the older 300 manual we read (2013 print) says 2 to 3 turns. Because the manuals disagree, use a ring gauge when you can. A thread that does not gauge properly can leak, so cut it off and adjust the die head.
• After threading: the 300’s standard equipment includes a can of white sealant with PTFE.

Threading Machine Safety: What the Operator Manuals Require

These are the makers’ rules, not tips. Read the manual for your exact machine; the RIDGID 300, 700 and 1224 manuals share the points below.

• Foot switch (bench machines). RIDGID says using a power drive or threading machine without a foot switch raises the risk of serious injury: the foot switch lets you stop the motor by taking your foot off. If clothing catches, the machine keeps winding it in, and with the machine’s high torque the clothing can bind around an arm or other body part hard enough to crush or break bones. Do not use the machine if the foot switch is broken or missing. The 300 manual says to lock the foot switch (its Figure 1 is titled “Locked Foot Switch”) when the machine is not in use, so it cannot start by accident. The 1224 manual adds: do not disconnect the foot switch and do not block it in the ON position.
• Clothing and gloves. No gloves and no loose clothing. Keep sleeves and jackets buttoned, take off jewelry, contain long hair, and never reach across the machine or the pipe. Work from the side with the REV/OFF/FOR switch.
• Hands and rotating pipe. Keep hands away from rotating pipe and fittings. Stop the machine, and let it come to a complete stop, before wiping the threads, screwing on a fitting or touching the pipe or chucks. Do not use the machine to make up or break fittings.
• Machine and pipe support. Secure the machine to a bench or stand so it cannot tip. Support long, heavy pipe with pipe stands: RIDGID says to use them when the pipe sticks out more than 4 feet past the drive, and, when the pipe extends past the machine, to guard or barricade at least 3 feet of clearance around the machine and pipe. Tighten the chuck handwheel and set the rear centering device on the pipe before you switch on. Keep the covers on.
• Hand-held drives. On 1 inch and larger pipe use a support device to take the threading force. RIDGID’s 700 manual lets you thread 3/4 inch and smaller without one, resisting the force yourself with the pipe secured; the 690-I manual says to always use the support device provided. Always hold the handle firmly when threading and when backing the die head off. Keep the drive against the support, with nothing between them. One person controls the work and the switch. Do not wear gloves or jewelry or use a rag while pushing on the cover plate to start the thread. Let the drive stop completely before you reverse it.
• Power and floor. Wear eye protection. Use a grounded outlet (GFCI in damp places) and a three-wire cord of the right gauge; RIDGID’s 300 manual calls for 14 AWG under 25 feet and 12 AWG from 25 to 50 feet, and an outdoor-rated cord outside. Unplug the machine before changing dies or making adjustments. Wipe up spilled oil so nobody slips. RIDGID says the drives are not explosion proof and can throw sparks, so keep flammable liquids and vapors out of the area.
• Cutting oil. RIDGID says to read the oil label and the Safety Data Sheet (SDS) for hazards, first aid, fire, protective equipment, storage and disposal. Wheeler-Rex’s manual for its oil adds: wear goggles and gloves when handling it, do not breathe the oil mist, keep it away from fire, and never thin it or mix it with another maker’s oil. Its threading warnings say no gloves while the machine runs, so handle the oil with the machine stopped (our reading). Keep your hand clear of the rotating parts when you oil.
• Hot dies and sharp chips. Wheeler-Rex warns that dies and scrap can be very hot right after threading. RIDGID says to wipe oil and debris off the threads with care, because the chips and edges are sharp.
• Hand ratchet (12-R). RIDGID says to mount the pipe firmly in a pipe vise, make sure the ratchet pawl is engaged before you put force on the handle, and never slide a pipe or “cheater” over the handle for extra leverage.

Stainless, Bolts, Bigger Pipe and Gas

• Stainless steel: the 700 manual’s troubleshooting chart says to select high-speed, stainless steel or alloy dies suitable for the material, and RIDGID warns that stainless can be contaminated during joining, so materials and methods need checking for the service. Wheeler-Rex sells separate stainless dies for the 8090, asks for Schedule 40 or heavier wall on stainless pipe, and says its stainless-pipe oil contains chlorine compounds and must not be burned off.
• Bolts: the 300 lists bolt 1/4 to 2 inch and the 1224 lists bolt 1/4 to 2 inch, each with its own dies for each bolt size. The 700 lists bolt 1/4 to 1 inch with the 00-RB die head.
• Bigger pipe: RIDGID’s geared threaders take the 300 to 2-1/2 through 6 inch pipe. The 1224 lists pipe 1/4 to 4 inch on a 1-1/2 HP induction motor.
• Gas pipe: black iron gas piping is threaded pipe too, but see the gas-work note above.

Do you even need to own one?

Same logic as the rest of the cluster: a power threading machine is a serious investment that only pencils out if you thread pipe regularly. For a one-time project, rent the machine or ask your supply house whether it will thread pipe to length for you. Buy the 300 when threading is a recurring, paid part of your work. Replacing old galvanized runs? Threaded joints are why it is slow work; see should you replace galvanized pipes. Doing copper instead of steel? You probably want a press tool, not a threader.

Which Pipe Thread Machine Do You Actually Need?

Pick the pipe thread machine by how often you thread and how big the pipe is. A bench machine like the RIDGID 300 threads 1/8 to 2 inch under power and is the one to buy for regular work. The RIDGID 690-I and 700 are the hand-held versions for site work, and both need a proper support. Below a handful of joints a year, thread by hand with a 12-R.

Frequently asked questions

Do I need a power threading machine or a manual threader? Buy a power machine like the RIDGID 300 if you thread pipe regularly or work with larger sizes, because it cuts, reams and threads on one setup. A manual ratchet threader such as the RIDGID 12-R, with a set of die heads, is plenty for occasional single fittings on small pipe and fits in a toolbox. A hand-held power drive (RIDGID 690-I or 700) sits between them. Match the tool to how often you actually thread.

What are the types of pipe threaders? There are three common kinds. Manual ratchet threaders, like the RIDGID 12-R, use one die head per pipe size and a hand ratchet. Hand-held power drives, like the RIDGID 690-I and 700 or Milwaukee’s cordless M18 FUEL, turn a die head while you hold the drive against a support. Bench or floor machines, like the RIDGID 300, 535 and 1224 or the Wheeler-Rex 8090, grip and rotate the pipe against a die head. On the 300, the die head can be quick-opening or self-opening.

What size pipe can the RIDGID 300 thread? RIDGID’s manual lists pipe 1/8 to 2 inch and bolt 1/4 to 2 inch, with a 1/2 HP universal motor at 38 or 57 RPM. RIDGID’s web page gives 1/2 to 2 inch as the standard capacity, and the Complete package ships with the 1/2–3/4 and 1–2 inch die sets, so the smallest sizes need extra dies. Geared threaders extend it to 6 inch pipe. It must be run with its foot switch.

Does the RIDGID 300 have a reset button? Not in the 300 operator’s manual we read (a 2013 RIDGID print): it lists only a FOR/OFF/REV switch and an ON/OFF foot switch, and mentions no reset button or breaker. If the machine will not start, first rule out the outlet, breaker or GFCI and the extension cord (our suggestion), then use the manual’s checks: an undamaged cord and plug, and a foot switch that starts and stops the motor. Motor brushes are to be checked every six months and replaced when worn to less than 1/2 inch. Repairs go to a qualified service center; RIDGID Technical Service is at (800) 519-3456. RIDGID’s micro CA-300 inspection camera, a different product, does have a Reset Button (under its left side port cover).

Which die heads fit the RIDGID 700? RIDGID says the 700 is designed to use 12-R die heads (1/8 to 2 inch pipe). Other RIDGID heads fit with adapters: 770 for 00-R and 00-RB, 771 for 0-R, 772 for 11-R and 773 for 111-R. Its manual says to use only RIDGID die heads. The RIDGID 690-I is a different drive that takes 11-R heads. Milwaukee lists its M18 FUEL threader as compatible with RIDGID 12-R and Reed R12+ heads.

Can I thread stainless steel pipe with these machines? Check the dies first. The RIDGID 700 manual says to select high-speed, stainless steel or alloy dies suitable for the material, and it warns that stainless can be contaminated during installation. Wheeler-Rex sells separate stainless dies for its 8090, asks for Schedule 40 or heavier wall on stainless pipe, and says its stainless-pipe oil contains chlorine compounds and must not be burned. Use the oil your machine’s maker specifies.

Do I need cutting oil to thread pipe? Yes. RIDGID says a generous quantity of its thread cutting oil lowers threading torque, improves thread quality and increases die life, and that a lubricating oil or poor cutting oil gives a poor thread, leaky joints, short die life and high handle forces. Read the oil label and Safety Data Sheet for handling, fire and disposal.

Can I wear gloves when threading pipe? No. RIDGID’s 300, 700 and 1224 manuals and Wheeler-Rex’s manual all say not to wear gloves or loose clothing while the machine runs, because they can be caught by the pipe or the rotating parts. Keep sleeves buttoned, keep hands clear of rotating pipe, and stop the machine before you wipe threads or screw on a fitting.

Can I rent a pipe threading machine instead of buying? Sometimes. Some tool rental counters and plumbing supply houses rent power threaders or will thread pipe to a length you specify, so call and ask. For a single project that beats buying. Buy a machine only when threading is a recurring, paid part of your work.

Sources

• RIDGID Model 300 Power Drive operator’s manual and RIDGID 300 Complete web page (capacity, motor, speeds, safety, dies, accessories)
• RIDGID 700 Power Drive operator’s manual and RIDGID 700 web page (12-R heads, support devices, adapters, troubleshooting)
• RIDGID 600-I/690-I Power Drives operator’s manual (690-I capacity, 11-R heads, speed, weight)
• RIDGID 1224 Threading Machine operator’s manual and RIDGID 535 web page
• RIDGID manual pipe threader (00-R, 12-R, 11-R) instructions
• Wheeler-Rex 2 inch pipe threading machines (8090) and its parts and operations manual
• Milwaukee M18 FUEL Pipe Threader with ONE-KEY kit (2874-22HD)

For the plumbers reading this

Most of this site is written for homeowners — this page clearly isn’t. If you’re in the trade and want the occasional straight-shooting note when I publish something like this (fittings comparisons, tool guides, code changes), drop your email. No spam, no course funnel, written by a licensed GA journeyman.