Standard_Parts_Catalogue

Page 653 | 2.2 Tensioning, Clamping with Knobs 1 2 2 2 3 4 d 1 d 2 Thread d 3 H7 Bore d 4 Thread Length l d 5 d 6 h 1 h 2 t min. Torque  ±10% in Nm 50 M  6 B  6 M  8 16 20 25 32 40 13,5 23,6 41,6 10,7 11 2 3 4 50 M  8 B  8 M 10 20 25 32 40 50 13,5 23,6 41,6 10,7 11 2 3 4 63 M  8 B  8 M  8 25 32 40 50 63 16 28,1 46,6 12,9 14 3,2 4 4,7 63 M 10 B 10 M 10 25 32 40 50 63 16 28,1 46,6 12,9 14 3,2 4 4,7 80 M 10 B 10 M 10 25 32 40 50 63 19 34,1 56,2 16,8 17 4 5,5 7,5 80 M 12 B 12 M 12 25 32 40 50 63 19 34,1 56,2 16,8 17 4 5,5 7,5 1 d 1 2 d 4 3 Length l 4 Torque How to order (Threaded stud) 1 2 3 4 GN3664-50-M8-40-3 Torque limiting three-lobed knobs / knob screws GN 3664 are used when the manually applied torque must be set or is to be limited. When turned clockwise, the torque mechanical system of the three-lobed 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. Information • Knob Technopolymer (Polyamide PA-HP) Glass fiber reinforced, black matte • Torque limiting mechanism Steel, hardened • Other parts Steel, blackened • Cover Plastic, light gray • Plastic Characteristics → Page 2158 • RoHS Specification • Other dimensions of bore inserts, threaded inserts or threaded studs analog GN 300 → Page 428 / 429 • Other inserts with special threaded studs analog GN 306 → Page 436 • Other torques • Torque limiting turning counterclockwise or turning counterclockwise and clockwise On request 1 d 1 2 d 3 (d 2 ) 4 Torque How to order (Bushing) 1 2 4 GN3664-80-B12-7,5 GN 3664 Torque Limiting Three-Lobed Knobs / Knob Screws