Snap-on PTM4400 Pneumatic Torque Wrench, 1-1/2″ Drive, 885-4,425 ft-lb (1,200-6,000 N·m)

Description

A slewing ring or a large flange can hold dozens of heavy bolts. With a manual gearbox, each pass takes a long time and wears out the crew. The Snap-on PTM4400 pneumatic torque wrench handles that kind of job with an air motor instead of arm power. It is the top size in the Snap-on PTM series, so it suits the biggest joints that a plant team tightens on a regular basis.

Snap-on PTM4400 pneumatic torque wrench at a glance

These figures come from the Snap-on Industrial catalog:

Snap-on also states that each PTM tool ships with a Certificate of Calibration and a torque vs. pressure chart. Even so, confirm the exact package with Lost in HCM when you ask for a quote.

Why air power at the top of the range

The PTM4400 uses the twin motor technology of the PTM line, so the tool runs down fast and then builds final torque smoothly. It does not hammer the joint, because it is a non-impacting tool with low vibration. Snap-on also quotes noise below 85 dB under load. In addition, the gearbox rotates independently from the handle. As a result, reaction force goes into the fixture and not into the operator’s wrists.

Jobs that call for the PTM4400

• Slewing rings on cranes, excavators and port equipment.
• Mill, crusher and kiln drive bolting during plant shutdowns.
• Large pump, compressor and turbine base bolts.
• Heavy steel structure joints where many bolts share one value.

If most of your joints sit well below 1,200 N·m, however, a smaller PTM model will give a better fit at the low end.

Setting torque with air pressure

You control PTM4400 output through the air supply. First, fit the Snap-on PTMFRL filter/regulator unit, which the catalog lists as required for PTM tools. Next, read the pressure for your target from the torque vs. pressure chart. Then set the regulator gauge and run a test joint. Also keep the hose short and wide enough, since a weak supply lowers the final torque.

Reaction and pinch points

Place the reaction fixture against a solid point, such as a neighboring nut or a frame lug. The secondary trigger keeps both hands away from pinch points, so use it on every pull.

Care routine for the Snap-on PTM4400 pneumatic torque wrench

Drain water from the air line each day, and keep the lubricator topped up. Check the drive square for cracks after heavy work. Never use the tool to break loose rusted nuts. Finally, book a torque check against your quality plan, because air tools drift with wear.

Order the PTM4400 in Vietnam

SMK Vietnam lists the Snap-on PTM4400 pneumatic torque wrench for our partner Lost in HCM, who handles supply and pricing. Send your joint list and air supply details when you request a quote from Lost in HCM. You can also compare other torque multipliers, or contact SMK Vietnam.

PTM4400 buyer questions

What square drive does the PTM4400 use?

It has a 1-1/2 in square drive, so plan for 1-1/2 in drive impact-grade sockets or adapters.

How do I set a target torque on it?

Set the air pressure on the regulator. The torque vs. pressure chart shows which pressure gives which output.

Is the PTM4400 too big for 500 N·m joints?

Yes. Its range starts at 1,200 N·m, so a smaller PTM model suits that work better.