GN 3664 Torque Limiting Three-Lobed Knobs

Torque Limiting Three Lobed Knobs GN 3664 thumbnail

Torque Limiting Three Lobed Knobs GN 3664 sketch

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d₁	d₂ Thread	d₃ H7 Bore	d₅	d₆	h₁	h₂	t min.	Torque ±10% in Nm

50	M 6	B 6	13,5	23,6	41,6	10,7	11	2	3	4
50	M 8	B 8	13,5	23,6	41,6	10,7	11	2	3	4
63	M 8	B 8	16	28,1	46,6	12,9	14	3,2	4	4,7
63	M 10	B 10	16	28,1	46,6	12,9	14	3,2	4	4,7
80	M 10	B 10	19	34,1	56,2	16,8	17	4	5,5	7,5
80	M 12	B 12	19	34,1	56,2	16,8	17	4	5,5	7,5

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Specification

Knob
Technopolymer (Polyamide PA-HP)
Glass fiber reinforced, black matte

Torque limiting mechanism
Steel, hardened

Other parts
Steel, blackened

Cover
Plastic, light gray

ISO Fundamental Tolerances

Plastic Characteristics

RoHS

On request

Other dimensions of bore inserts
or threaded inserts analog GN 300

Other torques

Torque limiting turning counterclockwise or turning counterclockwise and clockwise

Information

Torque limiting three-lobed knobs GN 3664 are used when the manually applied torque is to be limited.

When turned clockwise, the torque mechanical system of the knurled knob triggers an „over-engagement“ as soon as the specified torque is reached. When turning counterclockwise, the mechanical system locks such that the torque is not limited. For example, when tightening, this will ensure that the maximum permissible torque is not exceeded. On the other hand, the torque necessary for releasing will always be transferred reliably.

How to order