Description
Two male square drives cannot connect without a part in between. The Snap-on 75-20 socket adaptor solves that at the 1 in size, with a female square on each end. So a 1 in drive torque wrench can engage a tester or transducer that also presents a male 1 in drive.
Where the 75-20 sits in Snap-on’s adaptor list
| Part | Description |
|---|---|
| 65-78-2 | Female 3/4 in square x 3/4 in square |
| 75-25-1 | Female 1 in square x 3/4 in square |
| 75-20 | Female 1 in square x 1 in square |
| 2000-226-2 | 1 in male x 3/4 in female square drive reducer |
The Snap-on 75-20 socket adaptor is the only matched pair at 1 in. So it fits benches where both the wrench and the sensor use a full 1 in drive.
Heavy wrench testing with the Snap-on 75-20 socket adaptor
Snap-on offers two 1 in drive TTC transducers. The TTC13 reads 100 to 1,000 ft-lb, and the TTC14 reads 200 to 2,000 ft-lb. Because big wrenches load the link hard, the adaptor must sit squarely on both drives. A matched 1 x 1 part keeps the wrench on the sensor axis without a step in between.
Spare or second station
Snap-on supplies each TTC transducer with the correct adaptor for its range. So why buy a 75-20 on its own? First, adaptors wear, and a rounded square adds play to every reading. Second, a lab that runs two benches needs a link at each one. Finally, a spare keeps the bench running while a worn part waits for replacement.
Fitting and inspecting the 1 in link
Push the 75-20 fully onto the tester drive until it seats. Next, insert the wrench drive and check for rocking. Then load the wrench slowly through its signal. In addition, inspect the inner corners at each recalibration interval, because Snap-on calls for periodic checks to keep tester accuracy.
Ordering the Snap-on 75-20 socket adaptor
Lost in HCM supplies the 75-20 and prepares the price, while SMK Vietnam lists it. Mention your transducer and wrench drive sizes. Then request a 75-20 quote from Lost in HCM. More parts sit under torque wrench heads and adaptors and torque testers and calibration systems. For drive questions, contact SMK Vietnam directly.
75-20 adaptor FAQ
Does the 75-20 change the wrench length?
No. It sits on the drive axis, so it adds no lever length to the wrench.
My transducer is 1 in but the wrench is 3/4 in. Which part do I need?
Snap-on lists the 75-25-1, a female 1 in x 3/4 in adaptor, for that mix.
Is the 75-20 a reducer?
No. Both ends are female 1 in squares. Reducers such as the 2000-226-2 have one male end.
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