Worm Gear Reducers GN 3975

Product description

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.

Specification

Housing

Aluminum
Sealed to prevent dust entry
Anodized finish, natural colorAN

Worm screw, steel

Worm wheel, brass

Ball bearing

Steel
Sealed (sealing disks 2RS)

Temperature range:
-4 °F to +140 °F (-20 °C to +60 °C)

RoHS

Build & Price

m₁	d₁ ±0.0002	Gear ratio i	b₁	b₂	b₃ ±0.0006	d₂ +0.001	d₃	d₄	d₅	h	l₁	l₂	l₃	l₄	t₁	t₂	t₃	t₄	m₁₀

0.79	0.4724	13	15	18	23	30	40	65	1.38	0.16	0.1575	0.472	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02

3D Product Configurator

Assembly Instructions

Do not exert any forces onto the housing or into the bearings during assembly. Use of the threaded holes d₈ in the shaft is recommended.

The use of a corresponding coupling is recommended to compensate for manufacturing-related shaft offsets and runout tolerances as well as for damping vibrations and shocks.

Application Examples

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Total US Dollars (net)

$431.90

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Quantity

Please note our quantity discounts (US Dollars).

Min	Max	Price
1	9	$431.90
10	24	$395.91
25	49	$359.92
≥ 50		$323.92

Prop 65: Not compliant

WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov

RoHS: Compliant

This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).

Weight: 0.930 lbs

If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351

All Prices are in US Dollars. Taxes Not Included.

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m₁	d₆*	d₇	d₈*	m₂	m₃	m₄	m₅	m₆	m₇	m₈	m₉

0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89

m₁	d₆*	d₇	d₈*	m₂	m₃	m₄	m₅	m₆	m₇	m₈	m₉

0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89

GN 3975 Worm Gear Reducers Aluminum

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Part Number	m₁	d₁ ±0.0002	Gear ratio i	b₁	b₂	b₃ ±0.0006	d₂ +0.001	d₃	d₄	d₅	h	l₁	l₂	l₃	l₄	t₁	t₂	t₃	t₄	m₁₀

3975-20-A-12-13-AN	0.79	0.4724 ±0.0002	13	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02
3975-20-A-12-15-AN	0.79	0.4724 ±0.0002	15	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02
3975-20-A-12-18-AN	0.79	0.4724 ±0.0002	18	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02
3975-20-A-12-23-AN	0.79	0.4724 ±0.0002	23	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02
3975-20-A-12-30-AN	0.79	0.4724 ±0.0002	30	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02
3975-20-A-12-40-AN	0.79	0.4724 ±0.0002	40	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02
3975-20-A-12-65-AN	0.79	0.4724 ±0.0002	65	1.38	0.16	0.1575 ±0.0006	0.472 +0.001	1.18	0.79	1.08	0.06	2.36	0.63	0.47	0.12	0.08	0.54	0.06	0.72	1.02