Free Engineering Tool #095
ಗಿಯರ್ ನಿಖುರತೆ ವರ್ಗ ಲೆಕ್ಕಕ್ಕೆ
ISO 1328-1 gear accuracy tolerances. Enter module, pitch diameter, face width, and quality class to look up pitch deviation, profile deviation, and helix deviation tolerances.
ISO 1328-1Classes 1–11ಸಹಿಷ್ಣುತೆಗಳು
Results
Quality Class
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Total Pitch Deviation Fp
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Single Pitch Deviation fpt
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Total Profile Deviation Fα
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Total Helix Deviation Fβ
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ISO 1328-1:2013 Tolerance Formulas
Where A is the flank tolerance class (1–11), mn is the normal module, d the reference diameter and b the facewidth, in mm. Tolerances are calculated for class 5 and scaled by the step factor √2 per class (20.5(A−5)), so values double every two classes. Total profile tolerance FαT and total helix tolerance FβT are the root-sum-squares of the corresponding slope and form tolerances (clause 5.3). The formulae apply within 5 ≤ z ≤ 1 000, 5 mm ≤ d ≤ 15 000 mm, 0.5 mm ≤ mn ≤ 70 mm, 4 mm ≤ b ≤ 1 200 mm.
Quality Class Application Guide
| ವರ್ಗ | ಅನ್ವಯಿಕೆ | Typical Tolerance Scale |
|---|---|---|
| 3–4 | Master gears, measuring instruments | Finest |
| 5–6 | Machine tools, precision gearboxes, turbine gears | Precision |
| 7–8 | General industrial gearboxes, vehicle transmissions | ಮಾನದಂಡ |
| 9–10 | Heavy machinery, mining, cement | Coarse |
| 11 | Rough gearing, agricultural, slow speed | Very coarse |
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