Housing Aluminum

GN 3975 Worm Gear Reducers

Type

A	With output on one side

Show filter

m₁	d₁ j6	Gear ratio i							b₁	b₂	b₃ JS9	d₂ H7	d₃	d₄	h	l₁	l₂	l₃	l₄	t₁	t₂	t₃

20	12	13	15	18	23	30	40	65	35	4	4	12	30	20	1,5	60	16	12	3	2	13,8	1,6

Filter combination produces no result.

m₁	d₅*	d₆	d₇*	m₂	m₃	m₄	m₅	m₆	m₇	m₈	m₉	m₁₀

20	M 4	4,2	M 5	26	50	17,5	1,5	31	26	42,5	22,5	26

Filter combination produces no result.

* Usable thread depth: min. 1.6 x d₅ / d₇

Specification

Housing

Aluminum
Sealed to prevent dust entry
Anodized, natural colorAN

Worm screw, steel

Worm wheel, brass

Ball bearing

Steel
Sealed (sealing disks 2RS)

Temperature range: -20 °C to +60 °C

Keyway P9 DIN 6885 Page 1

ISO Fundamental Tolerances

RoHS

Information

Worm gear reducer GN 3975 can transmit high torque despite their very compact dimensions. They can readily be used for a multitude of applications, such as incline adjustments or to change the direction of shaft rotation.

The numerous fastening holes allow for simple mounting in any orientation or position. The parallel keys can take any angular positions.

Depending on the gear ratio, there may be no static self-braking between the worm screw and worm wheel, meaning that the worm wheel can be turned out of a resting state by a torque coming from the output end.

How to order