Description
Heavier nutrunners and clutch tools often finish well above the reach of small joint adaptors. The Snap-on QC2JRS1000 joint rate simulator covers that upper band. It is the largest of Snap-on’s three joint rate adaptors, with a 1,000 in-lb capacity on a 3/8 in square drive. So a QA team can check a power tool on a joint that behaves like the real one, not on a rigid block.
Snap-on QC2JRS1000 joint rate simulator numbers
| Square drive | 3/8 in |
|---|---|
| Capacity | 1,000 in-lb (about 113 N·m or 83 ft-lb) |
| Adaptor bit | 3/8 in square internal x 1/2 in hex |
| Load screw | 5/8 in x 18 x 1.5 |
These values come from page 352 of CAT1500i, and Snap-on’s UK Torque Brochure prints the same row. The N·m and ft-lb figures are our conversions.
What changes from the 400 in-lb model
Both 3/8 in adaptors share the same drive. However, the QC2JRS1000 steps up to a 5/8 in load screw, against 7/16 in on the QC2JRS400. Its adaptor bit also ends in a 1/2 in hex, while the smaller unit uses 3/8 in. So keep each bit with its own adaptor on the bench. Pick the 1,000 in-lb model when your tool’s target sits above 400 in-lb.
Running a test on the Snap-on QC2JRS1000 joint rate simulator
The first four steps follow Snap-on’s catalog text, and the last one is ordinary bench practice.
- Place the square drive adaptor on top of the tester’s square drive.
- Tighten the set screw so the adaptor cannot turn on the drive.
- Insert the adaptor bit into the power tool.
- Mate the bit with the top of the joint adaptor, then run the tool.
- Read the peak on the tester, then reset the joint for the next cycle.
Soft, medium or hard joints
Stacking the Belleville washers in set patterns lets the QC2JRS1000 act as a soft, medium or hard joint. A hard joint reaches full torque in a small turn, much like steel on steel. A soft joint needs more turns, much like a gasket or a spring washer. So set the stack to match the assembly the tool really meets. That match keeps a bench result honest for the line.
A tester sized for 1,000 in-lb
The adaptor needs a tester with a 3/8 in drive and enough range. On page 346, Snap-on lists the QC2ETT1000 electronic tester with a 3/8 in drive and 100 to 1,000 in-lb. It also states that these testers can check non-impacting power tools with joint rate simulators. Snap-on does not pair the two by name, though, so treat the match as a fit by drive and range. Also keep impact wrenches and impact drivers off the QC2JRS1000.
Order the QC2JRS1000
Lost in HCM supplies this adaptor and handles the quote, while SMK Vietnam lists it for them. Tell them your tester model and the tools you plan to check. Then request a quote from Lost in HCM, compare torque testers and calibration systems, or contact SMK Vietnam.
Questions about the QC2JRS1000
Is 1,000 in-lb the same as 83 ft-lb?
Yes, roughly. Divide by 12 for about 83 ft-lb, or multiply by 0.113 for about 113 N·m.
Can I use it on a 1/4 in drive tester?
No. It has a 3/8 in drive. For 1/4 in testers, Snap-on lists the QC1JRS50 at 50 in-lb.
Which tools should stay off it?
Impacting tools. Snap-on lists these adaptors for non-impacting power tools only.
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