Torque Limiter Types & Applications

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JoyTork® Torque Limiter

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• Torque limiters up to 23.000 Nm• Standard version galvanized and yellow cromatized• Limitation of torque prevents high shock loads• Variably adjustable torque• Standard brass bushing for extended durability• Change of torque adjustment, even in assembled condition possible• Rust and acid resistant version available on request• Special version with needle bearing available on request• Asbestos free friction disc

Hub

Friction Disc

Centre Sliding Bush

Friction Disc

Pressure Ring

Disc Spring

Pressure Disc

Adjustment Insert

Adjustment Screws

Adjustment Screw for DA 6-DA 10

JoyTork® Torque Limiter

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Disc Spring LayersFor torque limiters three different layers of disc springs are possible.a) Disc springs in single layer for torque limiters DA 00 to DA 8b) Disc springs in two layers for torque limiters DA 00 to DA 8c) Disc springs in three layers for torque limiters DA 1 to DA 5If case c) is used, the width of the driving part is reduced and it should only be used when the dimensions of the construction are limited. Special adjustment unit is necessary.

Special adjustment nutsThe torque limiter JOYTORK® 0 to 5 requires in the lowest torque ranges and/or at higher revolutions a special adjustment nut with tangential clamping.

Friction discsThe friction discs of the torque limiters are free of asbestos. Special friction discs for long slipings and rustfree surfaces are available on request.

Bushing for centering drive partAs centering bushing a bronze bushing with good slide and wear properties is being used. All torque limiters are equipped with the longest bushing.Shorter bushing for smaller driven parts must be specially ordered.The calculation of the length of the bushing is as followed: length of bushing = 1,5 x s1 + b1 (see dimensions)

Possible application of disc springExperience shows that wear is less when a single disc spring is used, when double springs are used there is more wear and when triple springs are used , wear is much greater.Generally the time of wear of a friction disc depends on the adjusted torque, the rotational speed, the time of slipage and the frequency of slipage.

ExampleTorque limiter JT 3 Thickness of drive part b = 12mmTorque limiter JT 3 Thickness of friction disc s = 4mm1,5 x 4 + 12 = 18 mm length of bushingWhen ordering if no thickness of the driven part has been given, maximum length will be supplied.

Single Layer Two Layers Three Layers

1TFD 2TFD 1TF 1TFD 2TF 2TFD 3TF

JT 00 JT0-5 JT6-10 JT0-5 JT6-10 JT01-5

* Dimension d1 produced for bore H8** Only to be used when design has limited dimensions

Ordering Code:

JoyTork® Torque Limiter

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* The width of the driving part is reduced

Ordering Code:

JoyTork® Torque Limiter with Sprocket

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Selection of Sprocket Wheels

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1 Sprockets for roller chains DIN 8187 - ISO 808 B. Sprockets for roller chains DIN 8188 on request.2 When using double or triple sprockets the smallest number of teeth should be chosen 1 to 2 teeth larger.x Number of teeth marked with x have to be turned down evenly on both sides or have to be turned out (see width of torque limiter also).

Note: When installing sprocket the bushing has to be fitted. Length of bushing = sprocket + 1.5 x thickness of friction disc (see also torque limiters)

Material of sprockets: C 45 or other hardening steels.

Hardness of teeth surface HRC 56 ± 2

For best adjustment of the torque have the sprocket ground on both sides.

* Dimensions d1 manufactured for bore H8** Only to be used when design has limited dimensions.

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• Torque Limiter designed for wide drive parts in long version• Suitable for double and triple sprockets, timing belt disc, V-belt pulley.• Available as package unit with sprocket-, V-belt- and timing belt disc.

JoyTork® Torque Limiter MAX

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JoyTork® Torque Limiter with SPiDEX® Coupling

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* Bore over Ø 19, keyway according to DIN 6885/3** Only to be used when design has limited dimensions.

Ordering Code:

• Torque Limiter for protection against overload between two shafts.• Rotary elastic torque limiter can be axially stretched.• Variable elasticity due to different shore hardness of the elastic part.

JoyTork® Torque Limiter with DEnTEX® Coupling

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* Bore over Ø 19, keyway according to DIN 6885/3** Only to be used when design has limited dimensions

Ordering Code:

• Torque Limiters with universal joints and rigid connection of two axial shafts.• Large axial, radial and angular flexibility due to double universal joints.• Axial assembly.

JoyTork® Torque Limiter with Chain Coupling

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JOyTORk® torque limiter couplings provide strong and uncomplicated overload protection for the connection of two shafts. This consists of a normal JOyTORk® limiter with a sprocket built in and an additional sprocket with hub. The two sprockets are connected with a double roller chain type DIN 8187-ISO R 808 B, tight but slightly elastic. The two ends of the chain are connected with a connecting link.

JOyTORk® torque limiters are used as overload protection when a small parallel or angular deviation of the connecting shafts cannot be excluded.

JOyTORk® torque limiters can be applied in a horizontal or vertical position. The operating temperatures are between –20° C and +250° C. Maximum temperatures of +350°C are possible.

Ordering Code:

Torque Limiting Couplings Contents

The details contained within this catalogue are reproduced in accordance with the latest information at going to press ................ E & OE

Page

Types & Applications ....................................................................................................................................................................................................................................................................................................................................... 1

JoyTork® Torque Limiter Description ................................................................................................................................................................................................................................................................................. 2 - 3

Standard Dimensions ..................................................................................................................................................................................................................................................................................................................................... 4

With Sprocket Dimensions .................................................................................................................................................................................................................................................................................................................... 5

Selection of Sproket Wheels ............................................................................................................................................................................................................................................................................................................. 6

'Maximum' Dimensions ............................................................................................................................................................................................................................................................................................................................... 7

With Spidex® Coupling, Dimensions ................................................................................................................................................................................................................................................................................. 8

With Dentex® Coupling, Dimensions ................................................................................................................................................................................................................................................................................ 9

With Chain Coupling, Dimensions ........................................................................................................................................................................................................................................................................................... 10

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