21.120.01

Shafts and couplings in general

21.120.10

Shafts

21.120.20

Couplings

21.120.30

Keys and keyways, splines

21.120.40

Balancing and balancing machines

21.120.99

Other standards related to shafts and couplings
BS ISO 4156-3:2021

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DIN ISO 4156-2:2026-01

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DIN 5481:2025-12

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ISO/DIS 21940-14:2025

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25/30509361 DC:2025

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DIN 6892:2025-10

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DIN 5480-1:2025-10

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DIN 5480-2:2025-10

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DIN 5480-15:2025-10

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ASTM A503/A503M-25

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DIN ISO 21940-21:2025-01

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