The heavy metal piece that strikes the bit. If your bits are wobbling excessively, the anvil or the front bushing may be worn.
Each screw, spring, and gear has a callout number (e.g., "Item 42").
to newer Nuron models if you're considering an upgrade? Hilti Sid 4 A22 Parts Diagram
When looking at an official Hilti schematic, follow these steps to ensure you order the right part:
This is the "business end" of the tool. It converts the motor's rotational energy into high-torque impacts. The heavy metal piece that strikes the bit
If the repair looks too complex (especially the impact mechanism), Hilti's "Tool Fleet Management" or repair centers offer quick turnarounds.
The trigger assembly. If the tool runs intermittently or the LED light stays on/off, this is the likely culprit. to newer Nuron models if you're considering an upgrade
While third-party sellers exist, using genuine Hilti parts ensures the tool maintains its safety ratings and torque specifications.