Description
Big wrenches put real load on a test bench, and they need a sensor sized for it. The Snap-on TBTT600A torque transducer is the high-range unit in Snap-on’s horizontal tester system. It covers 30 to 600 ft-lb, roughly 41 to 813 N·m. So a tool crib can check its largest hand wrenches on the same TBT600A bench that handles small tools.
Snap-on TBTT600A torque transducer data
| Range | 30-600 ft-lb (about 41-813 N·m) |
|---|---|
| Resolution in ft-lb | .05 ft-lb |
| Resolution in in-oz | 10 in-oz |
| System | One of three transducers listed with the TBT600A |
Page 347 of Snap-on’s CAT1500i catalog lists these values. The N·m range is our conversion, and we leave out the other resolution entries because they do not agree with each other.
The overlap zone: TBTT100A or TBTT600A?
The mid transducer, the TBTT100A, covers the band just below this one. Its chart resolution is .01 ft-lb, against .05 ft-lb here. So for a wrench you test between about 30 and 100 ft-lb, compare both ranges before you choose. In that zone, the finer sensor usually gives the cleaner reading. Save the Snap-on TBTT600A torque transducer for test points above that band.
Wrenches that belong on the TBTT600A
Think of the large bodies in Snap-on’s own range. For example, the TEC602A Torqometer runs to 600 ft-lb on a 3/4 in drive. The QD4IN800A dual-range body covers 129 to 572 ft-lb, while the QC4P300 preset spans 60 to 300 ft-lb. Each of those scales fits inside 30 to 600 ft-lb. However, a 1,000 ft-lb wrench would overload the sensor, so test it on other equipment.
Peak hold on a heavy pull
Paired with the TBTT600A, the TBT600A display offers peak hold and first peak hold. It also reads in ft-lb, in-lb, in-oz, N·m, kg-m and kg-cm, and Snap-on lists the system as NIST traceable. With a click wrench, first peak catches the value at the click. Meanwhile, peak hold suits dial and electronic wrenches that you pull to a target. Also pull slowly and keep the handle level, because a long wrench flexes and bounces.
Protecting a high-range sensor
Snap-on warns users not to exceed rated torque on these testers. So stop each pull short of 600 ft-lb unless the test plan calls for full scale. Keep shock loads off the TBTT600A, such as a dropped wrench or a sudden jerk. Then store it dry and covered when the bench sits idle. Finally, send it for calibration on your lab’s own cycle.
Request the Snap-on TBTT600A torque transducer through Lost in HCM
Lost in HCM supplies the transducer and prepares every quote; SMK Vietnam lists it as a partner item. Tell them your tester model and serial number. Then request a quote from Lost in HCM, see other torque testers and calibration systems, or contact SMK Vietnam.
TBTT600A: what labs ask
How does 30-600 ft-lb convert to N·m?
About 41 to 813 N·m, from 30 to 600 ft-lb times 1.356.
Does the TBT600A tester already include it?
Yes. Snap-on lists the TBT600A with three transducers, and this is the high one. A single unit makes sense as a spare or a replacement.
Can it test a 1,000 ft-lb wrench?
No. Its chart range ends at 600 ft-lb, so a larger wrench needs a different tester.
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