What is the allowable moisture content for the wooden handles?

The moisture content of the timber should be well-seasoned, typically capped at 15%.

What IS code provides the general material requirements for these handles?

IS 620 covers the general requirements and classification of suitable timber species for wooden tool handles.

What defects are strictly prohibited in the timber?

Brittle heart, decay, dead knots, shakes, and cross-grain are prohibited as they significantly reduce shock resistance.

IS 4953

: 1989

Wooden handles for hand hammers-

CurrentSpecializedSpecificationMaterials Science · Timber and Timber Stores

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This standard specifies the material requirements, preferred timber species, dimensions, and tolerances for wooden handles used in hand hammers. It ensures the handles possess adequate impact strength and durability for safe manual operation.

Wooden handles for hand hammers-

Quick Reference Values

Maximum moisture content15%

Tolerance on length±5 mm

Tolerance on cross-sectional dimensions±1 mm

Practical Notes

Ensure the wood grain runs straight and parallel to the longitudinal axis to prevent sudden brittle failure during impact.

Strictly monitor moisture content; if the handle dries and shrinks post-assembly, the hammer head may loosen and become a severe safety hazard.

Knots, shakes, and cross-grains in the impact zone are critical defects and grounds for rejection.