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You are here: Product Overview > 3.6 Moving, Transferring, Connecting with Shafts and Joints > Gears > GN 3975 Worm Gear Reducers previous product

GN 3975 Worm Gear Reducers Housing Aluminum

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GN 3975 Worm Gear Reducers, Housing Aluminum

Standard sheet GN 3975 Print this page Mechanical Features / Assembly Instruction Keyway P9 DIN 6885 ISO Fundamental Tolerances

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, natural colorAN

Worm screw, steel

Worm wheel, brass

Ball bearing

Steel
Sealed (sealing disks 2RS)

Temperature range: -20 °C to +60 °C

RoHS

Technical drawing

GN 3975 Worm Gear Reducers, Housing Aluminum sketch

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GN 3975 Worm Gear Reducers, Housing Aluminum sketch

Article options / Table

Form

A	Output on one side

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

Build & Price

Open 3D configurator

Mechanical Features

Circumferential backlash at the drive shaft

1° ± 0.5°

Shaft direction of rotation

Any

Worm wheel set design

Left-hand

Life expectancy (guide value)

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

Show / Hide columns

m₁	Gear ratio	Max. input torque in Nm* at 100 min^-1	at 500 min^-1	at 1000 min^-1	Max. output torque in Nm* bei 100 min^-1	at 500 min^-1	at 1000 min^-1

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

Show / Hide columns

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

20	13	200	200	500	500	56	-
20	15	250	250	500	500	52	-
20	18	250	250	500	500	55	-
20	23	250	250	500	500	50	-
20	30	350	350	500	500	45	-
20	40	400	400	500	500	39	x
20	65	500	500	500	500	29	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

Selected Part (How to order)

Part number

Total (net)

234,41 €

plus VAT 44,54 €
gross 278,95 €

In stock

Weight: 0,422 kg

If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0

RoHS: Yes

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).

Customs tariff number

84834025

Please note our order discounts.

With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 49,99 €

Quantity

All prices in accordance with our price list No. 56, valid from 1 September 2024, plus VAT only valid for Germany.

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