SP-68 CRANKSHAFT INGCO (RH150028) D-66
🧰 What It Is
In the RH150028, SP‑68 refers specifically to this part in the exploded parts diagram as reference D‑66.
⚙️ Technical Function
The crankshaft performs several critical roles:
1. Motion Conversion
Converts the rotational input from the geartrain into linear motion required by the piston and hammer assembly.
Works with connecting rods/links to drive the piston up and down.
2. Timing and Synchronization
Ensures that the motion of the piston is correctly synchronized with rotation so hammer impacts occur at the right intervals.
3. Force Transmission
Endures and transmits high cyclic forces caused by repeated impacts during drilling/chiseling action.
4. Load Bearing
Must support both rotational and reciprocating loads with minimal friction and wear.