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Cylindrical involute gears and gear pairs. Concepts and geometry.

Cylindrical involute gears and gear pairs. Calculation and measurement of tooth thickness and backlash.

Gears — Cylindrical involute gears and gear pairs — Concepts and geometry

Overview ISO 21771:2007 - Gears: Cylindrical involute gears and gear pairs - Concepts and geometry defines the geometric concepts, symbols and calculation methods for cylindrical involute gears and g…

Cylindrical involute gears and gear pairs — Part 1: Concepts and geometry

Overview ISO 21771-1:2024 - Cylindrical involute gears and gear pairs - Part 1: Concepts and geometry defines the geometric concepts, terminology and parameters for cylindrical gears with involute he…

Metallic coatings — Measurement of coating thickness — Coulometric method by anodic dissolution

Cylindrical involute gears and gear pairs — Part 2: Calculation and measurement of tooth thickness and backla…

Overview ISO 21771-2:2025, "Cylindrical involute gears and gear pairs - Part 2: Calculation and measurement of tooth thickness and backlash," establishes calculation procedures and measurement relati…

Metallic coatings. Measurement of coating thickness. Coulometric method by anodic dissolution

Gears. Cylindrical involute gears and gear pairs. Concepts and geometry

1 Scope This International Standard specifies the geometric concepts and parameters for cylindrical gears with involute helicoid tooth flanks. Flank modifications are included. It also covers the con…