Description
Heavy 3/4 in drive torque wrenches end in a male square, and so do many transducer drives. Two male squares cannot meet without help. The Snap-on 65-78-2 socket adaptor bridges them, because it has a female 3/4 in square at both ends.
What sets the Snap-on 65-78-2 socket adaptor apart
Most adaptors in Snap-on’s tester table change the drive size. This one does not. Both ends take 3/4 in, so the wrench and the test drive stay the same size. As a result, a lab that checks large 3/4 in wrenches can couple them in one straight line, with a single joint.
When a 3/4 in setup can skip the 65-78-2
Look at the input on your tester first. For example, Snap-on’s TCR600 torque comparator has a 3/4 in female input and a 600 ft-lb capacity. So a 3/4 in wrench plugs straight into it. In that case, the adaptor only adds play. Use the 65-78-2 where both the wrench and the fixture present male squares.
Mixed-drive parts near the 65-78-2
- 65-78-1: female 1/2 in to female 3/4 in.
- 75-25-1: female 1 in to female 3/4 in.
- 2000-226-2: reducer, 1 in male to 3/4 in female.
- 2000-0154-18: reducer, 1-1/4 in male to 3/4 in female.
Thus a bench can serve several drive sizes from a 3/4 in core, while the 65-78-2 handles the matched pairs.
Bench routine with the 65-78-2
Seat each square fully before you load the wrench. Then rock the joint by hand, because visible play can upset repeat readings. Also check both bores for wear at each tester service. Snap-on adds that periodic recalibration checks keep a tester accurate.
Ordering the Snap-on 65-78-2 socket adaptor
SMK Vietnam lists this adaptor, and our partner Lost in HCM supplies it and issues the quote. Name your tester or transducer model in the request. Then get 65-78-2 pricing from Lost in HCM. You can also browse torque wrench heads and adaptors, see torque testers and calibration systems, or contact SMK Vietnam.
65-78-2 FAQ
Does the 65-78-2 change the drive size?
No. Both ends are female 3/4 in squares, so it only joins two male 3/4 in drives.
Do I need it to test a 3/4 in wrench on a TCR600?
Not to make the fit. The TCR600 has a 3/4 in female input, so the wrench drive seats in it directly.
Does Snap-on give a torque rating for the adaptor?
Its accessory table prints none. So stay within your tester’s capacity, and ask Lost in HCM if you need a figure.
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