Knurled indexing knob with stepless positioning and locking action

Materials:
1. Hardened steel C45 base with fixing holes.
2. Aluminium (alloy 2011) flange with laser engraved numbers.
3. Reinforced polyamide control knob. Resistant to oils and greases.
4. Stainless steel fastening cap with hexagon socket (Aisi 303).
5. PA6 cap.
6. Fastening snap ring in stainless steel (UNI 653).
7. High resistance tempered and hardened steel rotating cam shaft, with through hole and key.
8. Stainless steel knob insert (Aisi 303).
10. Stainless steel (Aisi 303) self-tapping screws TCS 2.9×19 for fastening the bush.
11. Aluminium (alloy 2011) turned unlocking pin holder bush.
12. Stainless steel (Aisi 302) pressure spring.
13. Hardened stainless steel locking roller (Aisi 52100 grade G2).
14. 2 turned stainless steel unlocking pins (Aisi 303).
Graduated flange:
The standard numbering of the flange goes from 0 to 9 with 10 graduations for each unit. (100 graduations).

ATTENTION!!: Select the rotation direction (O= clockwise A=counter clockwise).

Fastening & coupling:
Fixed to the machine with 3 x M05 hex socket head cap screws (number 9 in the drawing) (DIN 912).
The shaft is coupled to the knob by means of a shaft with keyway. Attention! The key, for technical reasons, is small in size. See attached diagram for bore/shaft dimensions.
The shaft hole is machined to H7 tolerance. Side fixing hole is not required. The diameter of the hole is fixed and cannot be varied.
Features:
The main feature of this product is the automatic locking function once the knob is released. This makes it possible to lock the shaft to which the knob is attached in the desired position. The start of the knob’s rotation serves to unlock the internal mechanism, either by turning the knob clockwise or counterclockwise. Once the rotation of the knob stops, the spring rotates the knob in the opposite direction and the automatic lock is activated. The use of this system avoids accidents or involuntary rotation of the shaft.
Limitations:
The knob is not capable of supporting the weight of the shaft to which it is coupled; consequently it does not replace the normal support systems (bearings, flanges, etc.). The knob cannot be installed if there is a motor drive present.