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GN 3975 Worm Gear Reducers Aluminum

Type: B - Continuous drive

Standard Sheet GN 3975 Print This Page Keyways WN 6885 / DIN 6885-1 ISO Fundamental Tolerances

Product description

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)

Operating temperature
-4 °F to +140 °F (-20 °C to +60 °C)

RoHS

GN 3975 Aluminum Worm Gear Reducers sketch

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Part Options / Table

Type

A	Output on one side
B	Continuous drive

m₁	d₆*	d₇	d₈*	m₂	m₃	m₄	m₅	m₆	m₇	m₈	m₉	m₁₀

0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18

m₁	d₁ j6	Gear ratio i	b₁	b₂	b₃ JS9	d₂ H7	d₃	d₄	d₅	h	l₁	l₂	l₃	l₄	t₁	t₂	t₃	t₄

0.79	0.4724	5	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
1.18	0.4724	5	10	17	20	25	34	45	64	1.57	0.16	0.1969	0.551	1.18	0.98	1.08	0.06	3.15	0.63	0.47	0.12	0.16	0.64	0.08	0.81

m₁	d₆*	d₇	d₈*	m₂	m₃	m₄	m₅	m₆	m₇	m₈	m₉	m₁₀

0.79	M 4	0.17	M 5	1.02	1.97	0.69	0.06	1.22	1.02	1.67	0.89	1.02
1.18	M 5	0.22	M 5	1.57	2.36	0.79	0.39	0.59	1.02	2.26	1.18	1.18

* Usable thread depth: min. 1.6 x d₆ / d₈

Build & Price

Mechanical Features

Circumferential backlash at the drive shaft

1° ± 0.5°

Shaft direction of rotation

Any

Worm wheel direction

Left

Life expectancy

1,000 hours under full load and rotational speed of 500 rpm,
assuming the gear box is operating for 20% of every 5 minutes (guide value)
(1 minute of operation + 4 minutes break) at an ambient temperature of 68 °F (20 °C)

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m₁	Gear ratio	Max. input torque in Nm* at 100 rpm	at 500 rpm	at 1000 rpm	Max. output torque in Nm* at 100 rpm	at 500 rpm	at 1000 rpm

20	5	2.9	2.3	1.7	10	8	6
20	13	2.1	1.8	1.5	15	13	11
20	15	1.5	1.3	1	12	10	8
20	18	1.1	0.9	0.7	11	9	7
20	23	0.9	0.7	0.5	10	8	6
20	30	0.6	0.5	0.4	8.5	7	5.5
20	40	0.35	0.31	0.26	5.5	4.8	4
20	65	0.24	0.2	0.16	4.5	3.8	3
30	5	5.4	4.9	4.3	19	17	15
30	10	3.4	3.1	2.8	20	18	16
30	17	2.2	1.9	1.8	17	15	14
30	20	1.7	1.6	1.4	15	13.5	12
30	25	1.3	1.2	1.1	13.5	12	11
30	34	1.2	1.1	1	12	11	10
30	45	0.9	0.8	0.8	10.5	9.5	9
30	62	0.5	0.4	0.3	8.5	7.5	6

Show / Hide columns

m₁	Gear ratio	Input side Max. radial force**	Max. axial force***	Output side Max. radial force**	Max. axial force***	Efficiency in %	Self- braking Static

20	5	44.96 lbf (200 N)	44.96 lbf (200 N)	112 lbf (500 N)	112 lbf (500 N)	70	-
20	13	44.96 lbf (200 N)	44.96 lbf (200 N)	112 lbf (500 N)	112 lbf (500 N)	56	-
20	15	56.20 lbf (250 N)	56.20 lbf (250 N)	112 lbf (500 N)	112 lbf (500 N)	52	-
20	18	56.20 lbf (250 N)	56.20 lbf (250 N)	112 lbf (500 N)	112 lbf (500 N)	55	-
20	23	56.20 lbf (250 N)	56.20 lbf (250 N)	112 lbf (500 N)	112 lbf (500 N)	50	-
20	30	78.68 lbf (350 N)	78.68 lbf (350 N)	112 lbf (500 N)	112 lbf (500 N)	45	-
20	40	89.92 lbf (400 N)	89.92 lbf (400 N)	112 lbf (500 N)	112 lbf (500 N)	39	x
20	65	112 lbf (500 N)	112 lbf (500 N)	112 lbf (500 N)	112 lbf (500 N)	29	x
30	5	89.92 lbf (400 N)	67.44 lbf (300 N)	180 lbf (800 N)	180 lbf (800 N)	70	-
30	10	89.92 lbf (400 N)	67.44 lbf (300 N)	180 lbf (800 N)	180 lbf (800 N)	58	-
30	17	89.92 lbf (400 N)	89.92 lbf (400 N)	180 lbf (800 N)	180 lbf (800 N)	46	-
30	20	180 lbf (800 N)	89.92 lbf (400 N)	180 lbf (800 N)	180 lbf (800 N)	43	-
30	25	180 lbf (800 N)	180 lbf (800 N)	180 lbf (800 N)	180 lbf (800 N)	41	-
30	34	135 lbf (600 N)	180 lbf (800 N)	180 lbf (800 N)	180 lbf (800 N)	29	-
30	45	157 lbf (700 N)	135 lbf (600 N)	180 lbf (800 N)	180 lbf (800 N)	25	-
30	62	157 lbf (700 N)	135 lbf (600 N)	180 lbf (800 N)	180 lbf (800 N)	27	x

*Input side speed, **at axial force = 0, ***at radial force = 0

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 (net)

Mex$11,549.40

Available within 2 weeks

Quantity

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Please note our quantity discounts (Mexican Pesos).

Min	Max	Price
1	9	Mex$16,169.16
10	24	Mex$14,821.73
25	49	Mex$13,474.30
≥ 50		Mex$12,126.87

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: +52(81)2721-4021

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