TB 9-5120-202-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Torque Wrenches and Torque Screwdrivers (General). The manufacturer's
manual and Federal Specifications, GGG-W-00686C (GSA-FSS) were used as the prime
data sources in compiling these instructions. The equipment being calibrated will be
referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. Variations among models are described in tables and figures.
b. Time and Technique. The time required for this calibration is approximately
0.5 hours, using the physical technique.
2. Forms, Records, and Reports. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description.
Test instrument
Performance specifications
parameters
Torque wrenches:
Type I, II, and V
Range: 0 to 2000 ft-lb
Accuracy: 4% of nominal reading from 20% of FS to FS1
Type III
Accuracy: CW: Same as Type I and II
CCW: 6% of nominal reading from 20% of FS1
Type IV
Accuracy: 5% of setting or as specified below, whichever is
greater from 20% of FS to FS
Size 1: 1/2 in-oz
Size 2: 1/2 in-lb
Torque screwdrivers
Range: 0 to 1600 in-oz and 0 to 100 in-lb
Accuracy: See appendix A
1 No
accuracy requirement from 0 to 20% of scale of wrench.
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