Description
A nutrunner can pass a check on a rigid fixture and still miss its target on a real gasketed joint. That gap comes from joint rate, meaning how fast torque rises as the fastener turns. The Snap-on QC2JRS400 joint rate simulator lets a torque tester recreate that behavior, so power tool checks look more like the production line.
How the Snap-on QC2JRS400 joint rate simulator works
Snap-on describes a simple stack. First, the square drive adaptor sits on top of the tester’s square drive and locks with a set screw. Next, an adaptor bit goes into the power tool and mates with the top of the joint adaptor. Inside, Belleville washers stacked in set patterns make the joint feel soft, medium or hard. In other words, you can match the test joint to the real one.
QC2JRS400 specifications
| Square drive | 3/8 in |
|---|---|
| Capacity | 400 in-lb (about 45 N·m) |
| Adaptor bit | 3/8 in square internal x 3/8 in hex |
| Load screw | 7/16 in x 20 x 1.5 |
| Tool type | Nonimpacting power tools |
Picking the right simulator
- QC1JRS50: 1/4 in drive, 50 in-lb, for small screwdrivers.
- QC2JRS400: 3/8 in drive, 400 in-lb, the middle size.
- QC2JRS1000: 3/8 in drive, 1,000 in-lb, for stronger tools.
Start from the highest torque your tool delivers. Then pick the smallest simulator that still covers it, while the tester’s square drive must also match. Also check that your tool’s output fits the adaptor bit.
Good practice with the QC2JRS400
Record the washer pattern of the Snap-on QC2JRS400 joint rate simulator for each test, so every audit uses the same joint. Also clean and inspect the load screw threads, because damaged threads change how the joint behaves. In addition, keep the tester on its periodic calibration schedule.
Ordering the Snap-on QC2JRS400 joint rate simulator
Lost in HCM supplies the QC2JRS400 and provides each quote; SMK Vietnam lists it for them. Include your tester model and the tools you plan to check. Then send a QC2JRS400 quote request to Lost in HCM. Related gear sits under torque testers and calibration systems, and you can contact SMK Vietnam with any question.
QC2JRS400 questions
Can I test an impact wrench with it?
No. Snap-on specifies the joint rate simulator adaptors for nonimpacting power tools only.
How do I change the joint from hard to soft?
You restack the Belleville washers. Snap-on says set stacking patterns let the adaptor simulate soft, medium or hard joints.
What if my tool goes above 400 in-lb?
Then look at the QC2JRS1000, which Snap-on lists with a 3/8 in drive and 1,000 in-lb capacity.
Reviews
There are no reviews yet.