Wear Plates: The Armor Protecting the Breaker Housing
26 November 2025
The hydraulic breaker body (Power Cell) is subjected to friction as it moves inside the outer housing. We protect the main body by absorbing this friction on Wear Plates instead of metal-on-metal contact.
Especially in heavy-duty breakers like Atlas Copco (Epiroc) and Rammer, failure to replace wear plates on time leads to melting of the main body and thousands of dollars in damage.
1. What Does a Wear Plate Do?
These parts are usually made of hardened plastic (Nylon/Polyamide) or special bronze alloys.
- Guiding: Ensures the breaker moves in a straight line within the housing.
- Protection: Absorbs friction generated during vibration, preventing the body from thinning.
2. Why is Shim Adjustment Important?
Plates get thinner over time, and the breaker starts to have gaps inside the housing. To eliminate this gap, a Steel Shim is added behind the plates, or the plate is replaced.
| Status | Symptom | Solution |
| Normal | Breaker is tight, no gap. | Continue. |
| Light Wear | Breaker started shaking. | Add Shims. |
| Heavy Wear | Plate is gone, metal visible. | Replace Plate. |
3. Compatible Brands
HKM manufactures high-durability wear plate and shim sets for the following models:
- Atlas Copco: MB 1700, HB 2000, HB 3000, HB 4200.
- Rammer: E 64, E 68, G 80, G 100.
- Montabert: V 32, V 45, V 55 and SC Series.
- Others: Furukawa, Soosan, MSB, MTB.