Tooth Thickness Measurement Diagram

Appendix 3. DIAGRAM of tooth thickness measurement of an involute gear drive

General provisions

• The tooth thickness (S of the tooth) is measured at the constant chord, whose height (H of the chord) is determined for a spur and helical involute gear drive by the formula: H of the chord = 0.748m, where m is the tooth module.
• The diagram indicates: S of the tooth — tooth thickness, H of the constant chord — height of the constant chord, pitch circle diameter.

Procedure

1. Determine the height of the constant chord by the formula H of the chord = 0.748mm is the tooth module; the formula is applicable to a spur and helical involute gear drive
2. Measure the tooth thickness (S of the tooth) at the constant chord with a gear tooth vernier caliper of the ШЗН ТУ 2-034-773-89 typegear tooth vernier calipers of other types may be used

Notes

• Tooth thickness measurements are made with gear tooth vernier calipers of the ШЗН ТУ 2-034-773-89 type (or other types).
• Note! Measurement of the tooth thickness at the pitch circle chord is permitted.

Referenced by

• Industrial reducers and transmissions
• Gearboxes with oil filtration
• Open Gear and Chain Drives
• Lathe-group machine tools
• Milling machine group
• Internal grinding machines
• Centerless Grinding Machines
• Jig Boring Machines

Source: Instructions for the use of XADO revitalizant gels IE-24.6-25612000-005-2008.