Description
Heavy torque benches often mix drive sizes. The Snap-on 75-25-1 socket adaptor joins a male 1 in square to a male 3/4 in square, with a female opening at each end. CAT1500i places it in the tester accessory table, right beside the matched 75-20.
Which end takes which drive
The 1 in end receives a male 1 in square, for example a sensor drive. The 3/4 in end then accepts the male drive of a 3/4 in wrench. As a result, a 3/4 in wrench can load a 1 in sensor in one straight line. Check that your sensor presents a male square first, because the 75-25-1 has no male end.
Snap-on 75-25-1 socket adaptor and its neighbors
| Part | End A | End B |
|---|---|---|
| 75-25-1 | Female 1 in | Female 3/4 in |
| 75-20 | Female 1 in | Female 1 in |
| 65-78-2 | Female 3/4 in | Female 3/4 in |
| 2000-226-2 | Male 1 in | Female 3/4 in |
The 2000-226-2 reducer suits a female 1 in input. By contrast, the 75-25-1 suits a male 1 in drive. So look at the sensor end before you choose between them.
1 in sensors and 3/4 in wrenches
Snap-on’s 1 in TTC units are the TTC13 at 100-1,000 ft-lb and the TTC14 at 200-2,000 ft-lb. Its 3/4 in unit, the TTC12, reads 60-600 ft-lb. Hence a 3/4 in wrench usually belongs on the TTC12. However, a bench that has only a 1 in sensor mounted can still test it through the 75-25-1. In that case, keep every test point inside the sensor range. For example, a CTECH4R600A tested at 20% of 600 ft-lb gives 120 ft-lb, which suits the TTC13 but not the TTC14.
Keeping the 75-25-1 true
Inspect both openings before each session, since a worn square adds play to every reading. Store the adaptor in the tester case with the other drive parts. Never load the link past the smaller drive or the sensor rating. Snap-on also calls for periodic recalibration checks to keep tester accuracy.
Pricing the Snap-on 75-25-1 socket adaptor
The 75-25-1 appears on SMK Vietnam, but Lost in HCM is the supplier that quotes it. Mention your sensor model and the wrench drives you plan to test. Once you have them, request 75-25-1 pricing from Lost in HCM. Benches and sensors sit in torque testers and calibration systems, and other links in torque wrench heads and adaptors. Questions on drive sizes can go to SMK Vietnam.
75-25-1 setup questions
Can the 75-25-1 plug straight into a female input?
No. Both ends are female, a 1 in square and a 3/4 in square, so it needs a male drive on each side.
Do I need the 75-25-1 for a TCR600 comparator?
No. The TCR600 has a 3/4 in female input, so a 3/4 in wrench fits it directly.
What if my sensor has a female 1 in input?
Then a reducer with a male 1 in end, such as the 2000-226-2, is the right link.
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