Snap-on PTM740 Pneumatic Torque Wrench, 3/4″ Drive, 147-740 ft-lb (200-1,000 N·m)

Description

Truck and bus wheel nuts are a classic torque problem. They come in full sets on every wheel, they need the same value every time, and they sit deep in the wheel. The Snap-on PTM740 pneumatic torque wrench is the smallest model in this group, and it fits that work well. It has a 3/4 in square drive and a range of 147-740 ft-lb, or 200-1,000 N·m.

Wheel work with the 9 in extension

Snap-on lists a 9 in wheel torque extension, part WTE4G72L9, for the PTM740. It works with reaction cups, so the reaction force stays off the wheel and hub. Also, the extra reach makes recessed lug nuts easier to access. Snap-on offers standard and deep-well cups to match its impact sockets. Ask Lost in HCM which cup suits your wheel nut size.

Snap-on PTM740 pneumatic torque wrench specs

• Square drive: 3/4 in.
• Range: 147-740 ft-lb (200-1,000 N·m).
• Accuracy: ±5%, according to Snap-on.
• Non-impacting drive with twin motors and low vibration.
• Kit: case, cranked reaction fixture, tool hanger, secondary handle and male quick connect.

When a click wrench is enough, and when it is not

A 3/4 in click wrench can reach these values too. However, the operator must pull hard on every nut, and results vary as the arm tires. The Snap-on PTM740 pneumatic torque wrench lets air do the pull, so the hundredth nut gets the same treatment as the first. Therefore it pays off where the same joint repeats all day, such as fleet depots, tire shops and axle assembly.

A version with on-tool control

Snap-on also lists a PTM740IC model. It adds an LED display for setting torque on the tool and a colored pass or fail light. If you need that feedback, ask Lost in HCM about the IC version instead.

Air supply and setup

Feed the PTM740 through the Snap-on PTMFRL filter/regulator unit, which the catalog lists as required for PTM tools. Then set the pressure from the torque vs. pressure chart that Snap-on supplies. Next, brace the reaction fixture and pull the secondary trigger, which keeps hands away from pinch points.

Storage and checks for the PTM740

After each shift, hang the tool or store it in its case. In addition, drain the filter bowl and check the oil feed. Also look for wear on the drive square, because a worn square can let sockets rock. Finally, verify output on a torque tester at regular intervals.

Get the Snap-on PTM740 pneumatic torque wrench in Vietnam

SMK Vietnam lists this tool for Lost in HCM, our supply partner. Please request a quote from Lost in HCM and mention any cups or extensions you need. More torque multipliers sit in the same category. Brand details live on snapon.com, and you can always contact SMK Vietnam.

Questions about the PTM740

Is the PTM740 good for truck wheel nuts?

Yes, it is a common choice. For best results, pair it with the WTE4G72L9 extension and a matching reaction cup.

Does it come in a 1 in drive?

No. This model uses a 3/4 in drive, while the PTM1475 moves up to a 1 in drive.

What is the difference from the PTM740IC?

In short, the IC version adds an on-tool LED display and a pass or fail light. By contrast, you set the standard model by air pressure.