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GN 3971 Bevel Gear Boxes Housing Aluminum

Type: T - Bevel gear with two output shafts

Standard sheet GN 3971 Print this page Keyways DIN 6885-1 ISO Fundamental Tolerances

Product description

Bevel gear boxes GN 3971 can transmit high torque despite their very compact dimensions. They can readily be used for a multitude of applications, such as height 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.

Specification

Housing
Aluminum

Sealed to prevent dust entry
Anodized, natural colorAN

Bevel gear wheels
Steel
Case-hardened

Ball bearing
Steel
Sealed (sealing disks 2RS)

Operating temperature -20 °C to +60 °C

RoHS

GN 3971 Bevel Gear Boxes, Housing Aluminum sketch

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Article options / Table

Type

L	Bevel gear 90°
T	Bevel gear with two output shafts

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b₁	d₁ j6 Type L	Type T	b₂ Type L	Type T	d₂	d₃**	h Type L	Type T	l₁	l₂	l₃ Type L	Type T	l₄	m₁	t₁ Type L	Type T	t₂ Type L	Type T

18	6	6	2	2	13	-	0,8	0,8	32	12	8	8	2	23	2,1	3,1	15,4	15,1
20	8	6	2	2	16	9,2	0,8	0,8	35	12	8	8	2	25	1,95	2,25	15,3	14,25
24	10	8	4*	3	19	11,8	1,5	1,2	42	16	12	10	3	30	2	2	18	18
26	12	8	4	3	21	13,6	1,5	1,2	46	16	12	10	3	33	2	2	19,5	18
30	12	8	4	3	24	16,4	1,5	1,2	53	16	12	10	3	38	2,1	2,3	18,3	18,3
32	12	10	4	3	28	19,8	1,5	1,2	56	16	12	10	3	40	2,1	2,8	18,3	18,8
35	12	12	4	4	30	20,4	1,5	1,5	60	16	12	12	3	42,5	2,1	3,2	18,3	19,2

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b₁	d₄	d₅***	d₆***	d₇**** Type L	Type T	m₂	m₃	m₄	m₅

18	3,1	M 3	M 3	M 3	M 3	6	8,5	13	11
20	3,1	M 3	M 3	M 3	M 3	7	10	15	10
24	4,1	M 4	M 4	M 4	M 4	8	12	18	16
26	4,1	M 4	M 4	M 5	M 4	9	13	20	16
30	4,1	M 4	M 4	M 5	M 4	11	15	22	16
32	4,1	M 4	M 4	M 5	M 4	12	17	24	16
35	4,1	M 4	M 4	M 5	M 5	13,5	17,5	26	16

* Deviating from DIN 6885-1

** Theoretically usable hub diameter

*** Usable thread depth: min. 2 x d₅ / d₆

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

Build & Price

Mechanical Features

Gear ratio i

1:1

Circumferential backlash at the drive shaft

3° ± 0.5°

Shaft direction of rotation

Any

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 20 °C

Maintenance

Permanent lubrication with grease, maintenance-free

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b₁	Max. torque in Nm at 100 rpm	at 500 rpm	at 1000 rpm	Max. radial force in N*	Max. axial force in N**

18	0,35	0,1	0,1	60	60
20	0,75	0,3	0,3	100	100
24	2,5	1	1	120	120
26	4	1,5	1,5	140	140
30	5	2	2	240	240
32	8	3	3	550	550
35	10	4	4	550	550

*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 d₆ 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 Example

Selected Part (How to order)

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Total (net)

238,00 €

plus VAT 45,22 €
gross 283,22 €

In stock

Weight: 0,059 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

84834023

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.