Description
Heavy joints on a production line still need repeatable torque, and a long preset body handles that job. The Snap-on QC4P300 torque wrench body holds one value between 60 and 300 ft-lb, or 82 to 400 N·m. In addition, Snap-on lists a 27 in length and an X shank of 0.735 in, which pairs it with the larger X-shank heads.
The picture comes from the same Snap-on QC preset series and shows a sibling body.
Snap-on QC4P300 torque wrench body specifications
| Model type | Preset |
|---|---|
| Range | 60-300 ft-lb (82-400 N·m) |
| Shank | X (0.735 in) |
| Length | 27 in |
| QC series accuracy | ±4% clockwise, ±6% counterclockwise, from 20% of full scale to full scale |
A full range inside the accuracy band
Snap-on rates QC bodies from 20% of full scale to full scale. For this body, 20% of 300 ft-lb is exactly 60 ft-lb, which is also the bottom of its range. As a result, any value you preset sits inside the stated band. That makes the QC4P300 a simple choice for targets from 60 to 300 ft-lb. Above 300 ft-lb, the QC4P600 takes over with a Z shank and a 200 to 600 ft-lb range.
X-shank heads for the QC4P300
Snap-on’s ratcheting square drive heads for X bodies come in 3/8, 1/2, 3/4 and 1 in drive. For example, a 3/4 in head suits heavy sockets, while the 1 in head covers large axle and frame nuts. On standard QXD heads, meanwhile, the fastener sits 4.50 in from the retaining pin. A head with a different distance changes the torque at the fastener, so set the body with its working head fitted.
Pulling 300 ft-lb on the QC4P300
Torque divided by lever length gives the hand force. At 300 ft-lb, a 27 in lever needs roughly 130 lb at the grip, and the head adds a little leverage on top. That is a firm two-hand pull. So position the body to pull toward you, keep a balanced stance and stop at the click.
Heavy stations for the QC4P300
- Wheel-end, suspension and axle bolts on truck and bus lines.
- Track and frame hardware on construction and farm machines.
- Gearbox and motor base bolts in heavy equipment assembly.
Buying the Snap-on QC4P300 torque wrench body
Lost in HCM supplies the QC4P300 and prepares the quote, while SMK Vietnam lists it for them. First, send the preset value, head sizes and quantity. Then request a quote from Lost in HCM, compare more torque wrenches, or contact SMK Vietnam. Snap-on also presents the QC range on snapon.com.
QC4P300: what buyers ask
Which shank letter fits the QC4P300?
X, with a 0.735 in diameter. So pick heads from the X column of Snap-on’s head tables.
What length is the QC4P300 body?
Snap-on lists a body length of 27 in, which makes it the longest X-shank preset body in the brochure table.
What happens above 300 ft-lb?
Move up to the QC4P600. Snap-on lists it with a Z shank and a 200 to 600 ft-lb range.
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