Description
Big flanges, slew rings and track bolts need a long lever and a firm grip. The Snap-on QD4IN800A torque wrench body supplies both. In fact, it is the largest body in this dual-range family, with a 150-800 N·m scale and a Z-shank receiver for heavy interchangeable heads.
Snap-on QD4IN800A torque wrench body range and size
| N·m scale | 150-800 N·m |
|---|---|
| ft-lb scale | 129-572 ft-lb |
| Increments | 5 N·m / 4.3 ft-lb |
| Shank type | Z (0.990 in) |
| Length | 41-1/2 in (1,054 mm) |
| Accuracy (Lost in HCM listing) | ±4% |
Lost in HCM’s listing calls it an adjustable dual-scale body with ±4% accuracy. Meanwhile, Snap-on’s CAT1500i catalog supplies the range, length and shank data above.
Heads that suit the Z-shank QD4IN800A
The Z shank is the thickest in Snap-on’s system at 0.990 in. Standard Z heads hold the fastener 5.75 in from the retaining pin, and the body expects that distance. So useful options include:
- Square drive heads, in ratcheting as well as fixed versions, for heavy sockets.
- Open-end heads for large nuts on pipe and hose runs.
- A ratcheting pipe wrench head, which Snap-on lists as RPWH128Z.
- The QZD32A-1 adaptor, so the Z shank becomes a 1 in square drive.
If a head places the fastener at another distance, follow Snap-on’s head-length instructions rather than guessing a correction.
Handling a 41-1/2 inch QD4IN800A
Length gives leverage, but it also needs room. So before you choose this body, measure the swing space around the joint. Then plan where the operator will stand, because a steady, square pull matters more at 800 N·m than at 80. Also support the head end, so the head stays square on the fastener. Finally, keep it for tightening only, since Snap-on’s catalog warns against loosening stuck fasteners with it.
Jobs in this range
- Track and undercarriage bolts on excavators and dozers.
- Flange bolts on large pumps and valves.
- Gearbox and coupling bolts in heavy plants, such as cement and steel mills.
Heavy maintenance rarely repeats one value, so an adjustable body fits it. On the other hand, a preset body would hold a single value, which suits line work better.
Buying the Snap-on QD4IN800A torque wrench body
For this body, Lost in HCM handles the sourcing and the quote, while SMK Vietnam acts as the listing site. Snap-on’s catalog pairs each dual-range body with a calibration certificate and a molded case, so ask Lost in HCM to confirm both for your unit. Then get a QD4IN800A quote from Lost in HCM and add the heads you need. Besides that, you can compare other torque wrenches, visit snapon.com, or talk to SMK Vietnam.
Heavy-duty QD4IN800A FAQ
Can I fit a 1 in socket to the QD4IN800A?
Yes, with a Z-shank square drive head or the QZD32A-1 adaptor, which Snap-on lists as Z shank to 1 in drive.
Does it suit breaking bolts loose?
No. Snap-on’s catalog tells users not to loosen fasteners with its torque instruments.
What is the top value in ft-lb?
Snap-on lists the ft-lb scale up to 572 ft-lb.
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