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Catalogue BS

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1.3 - TOLERANCES

1.3.1 - Electrical tolerances

The following tolerances are permitted according to CEI EN 60034-1:


	Efficiency	-0.15 x (1-ii)P < 50 kW
	Power factor	^1- ^cospp 0.02 max 0.07] 6
	Slip	± 20% (*)
	Locked-rotor current	+ 20%
	Locked-rotor torque	- 15% .„+25%
	Breakdown torque	- 10%

(*) ± 30% for motors with Pn < 1kW

1.3.2 - Mechanical tolerances

Dimensions and tolerances of shaft end, key and industrial flange are in accordance with EN 50347, IEC 60072-1, CEI-UNEL 13501.

Shaft ends feature a threaded hole in accordance with UNI 3221, DIN 332. The shaft key is fitted in the key-way and supplied along with each motor.

The following table lists the tolerances for the different parts:


Part	Drawing letter	Tolerance
Shaft end	D-DA	j6
Key	F-FA	h9
Flange	N	j6