Epiroc has introduced tunnel versions of its SB 302 and SB 402 hydraulic breakers for underground work, such as scaling, tunneling and mining.
The breakers are designed with a stainless-steel piston to extend the piston’s life. Other features designed to increase attachment durability include a press-fit, one-piece bushing locked by an additional pin, an exchangeable wear plate over the hammer body, and heavy-duty retainer bars and a locking pin.
A collar with a front shield and a dust cover minimize dust intake when working in overhead areas, the company says. The breaker can be adjusted to improve performance during traditional scaling operations or during rock-breaking jobs.
The new tunneling attachments fit excavators of 4.5 to 13 tons and standard underground scalers. The SB 302 has a service weight of 690 pounds and the SB 452 is 990 pounds.