Big and small news in ‘Solid Body’ hydraulic breaker tunnel rangePublished 5/10 at 16:07
Two new additions have been added to the popular tunnel version of the Epiroc SB breakers. The new lightweight SB 202 Tunnel and the buff SB 552 Tunnel add versatility at both ends of the range.
The thorough work undertaken further developing the proven SB breaker concept for underground applications led to the introduction of the SB 302 and SB 452 Tunnel versions in 2017. With features focused on extended lifetime and overall cost reductions, they became an underground hit. As of mid-2020 the family doubled in size. Both the lighter SB 202, weighing in at 200 kg, and the powerful SB 552, with a service weight of 560 kg, share the popular and robust qualities of the existing models. They also extend the scope of suitable carriers to 2.5t -15t (previously 4.5t -13t).
Among the application specific modifications are exchangeable wear plate and front shield dust cover that extends lifetime by preventing bigger rocks from damaging the body and keeping dust out, being primarily of importance when working on overhead areas. The tunnel version is also equipped with integrated nozzles for water spraying, a feature with a positive effect on both health and safety. As the water catches the dust, the line of sight of the operator stays clear and the dust is kept on the ground. Bushing bore wear is kept down with a press fit bushing locked by an additional pin. Exchangeable restrictors make sure performance is adjusted to the current job requirements, whether in traditional scaling or heavier rock breaking.
The DNA of the Solid Body concept is particularly obvious in the advanced special version. Among the appreciated features carried over from the original SB breaker are the energy recovery system that uses recoil energy from the piston to reduce vibrations and increase performance; the pressure relief valve to protect against overload and last but not the least, all the weight, design and durability benefits of the solid body itself. “We’re pleased to provide all our customers working underground with further options. Their business is our number one priority and with the durability and low operating cost of these breakers we know we can support them even better,” concludes Torsten Ahr, Epiroc vice president of marketing.