OPERATING
1. Use a Standard Torque Wrench (C) to establish the relationship between the torque received at the
Test Nut (A) and the reading at the Dial Gauge (B). Set the torque wrench (C) to a desired torque
value (in N-in, kg-m, or ft-lbs) and put a suitable socket on Test Nut (A). Tight the Test Nut in the
clockwise direction until the set torque is attained, and then record the value from the Dial Gauge
reading (in psi, bar, or kgf-cm²) which will become the "NORM" to the specific torque value set at the
Standard Torque Wrench.
By repeating this procedure with different torque settings, you may make your own comparison chart
to reflect the relationship of the output torque (in N-m, kg-m, or ft-lbs) and the reading (in psi, bar, or
kgf-cm²).
2. Replace the Standard Torque Wrench by an intended power tool and repeat (1) again. Compare the
readings from (2) and (1) to see the output difference between the power tool and "NORM".
3. Find the correct reading for the prototypes of each power tool model under a fixed air pressure and
record reading as a "NORM" list. When in mass production, submit the selected samples for such test,
with the same air pressure, to see whether the value is under a controlled tolerance. The comparison
method is more use for maintenance and the performance of the same models.
4. The "Norm" list obtained from (3) can be used to check whether a power tools is still serviceable.
Bearing in mind that any comparative drops in the reading is a signal for a repairing.
5. Should there is any doubt about the output of the tool having been repairing, have it and a new tool of
the same model for the test. Compare these two readings to see if the repair is completed.
LUBRICATION
To minimize friction variables during testing, the bolt assembly should be thoroughly lubricated including
the contact surface of the test bolt and the test copper piece face. SUMAKE recommends, an extremely
pressure grease for lowest friction coefficient.
SAFETY
1. Before testing, be sure to put lubricating oil on the test nut, test bolt, and test copper pieces and keep
the device clean and remove any metal chips from the assemblies to ensure its accuracy.
2. Before testing, be sure to tighten the nut and stick it on the copper piece. (Just tighten it by hand)
3. Set the Dial Gauge to ZERO by turning the Test Nut before starting each test.
4. Please use impact socket comply with international standards. (Do not use incorrect size or crack unit
for testing.)
5. The base of test device must be well fixed.
6. Choose a proper test device for your specific application according to the test range. Do not overload
the device. The test range of each test device is listed on the table below.
