Abstract： ASME B107.300:2021 pdf download.Hand Torque Tools and Torque Testers. 4 CLASSIFICATION See Tables 4-1. 4-., and 4-3, 5 PERFORMANCE REQUIREMENTS Figures are descriptive and not restrictive. They are not intended to preclude the manufacture o...

ASME B107.300:2021 pdf download.Hand Torque Tools and Torque Testers.

4 CLASSIFICATION

See Tables 4-1. 4-., and 4-3,

5 PERFORMANCE REQUIREMENTS

Figures are descriptive and not restrictive. They are not intended to preclude the manufacture or purchase of other lorms of torque instruments conforming to this Standard.

Torque instruments shall pass all applicable tests in section 6.

Unless otherwise specified, torque instruments shall be calibrated in the direction(s) of intended use.

Torque instruments shall be capable of being calibrated to the specified accuracy by a method traceable to the National Institute

of Standards and Technology (NIST).

5.1 Design — Category 14 MechanicaL

5.11 Type I, CLasses A, B, C, and D — Indicating

(a) Operation. Instruments shall indicate torque applied through a deflecting member. They shall operate In both clockwise and

counterclockwise dlrections.

(1) 73’pe I. L’lassesA and B — Deflecting Beam. flexing ola cantilever beam connecting the square drive and hand grip shall

provide the basis of operation. Type I, aass A deflecting beam torque Instruments may be similar to that shown In Figure 5.1.1-1.

Type I. Class B detlectrng beam torque instruments may be similar to that shown in Figure

5.1.1•2.

Classes C and D — Rigid Mousing. The deflecting member and dial mechanism shall be enclosed within the rigid housing. The pointer and dial face shall be protected by a transparent cover that shall he so located and constructed as to be reasonably free from

accidental damage resulting from being struck or abraded. Type I, Class C rigid housing torque instruments may be similar to that

shown in Figure 5.1.1-3. Type I. Class D rigid housing torque instruments may be similar to that shown in Figure S.1.1•4.

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