These products are made in two main manufacturing concepts; steel casting and fabrication by electric welding process. JSB’s comprehensive experience in manufacturing technique ensures the durability and toughness of its front idlers.

Hardness of running rail surfaces is Rockwell C 54, and Rockwell C 40 measured at a depth of 4mm to 8mm depending on size of the section. The products are supplied as fully sealed and lubricated assemblies from the factory, up to complete idler groups.
MAKER
PRODUCT RANGE FOR IDLER ASSY
CATERPILLAR
E70B-E450, D3-D8
KOMATSU
PC20-PC600, D20-D155
HITACHI
EX25-EX750, ZX40-ZX600
DAEWOO/DOOSAN
DH04-DH450, S50-S450
HYUNDAI
R50-R5000
KOBELCO
SK04-SK400, K903-K912
MITSUBISHI
MS110-MS280
SAMSUNG/VOLVO
SE130-SE450, MX3-MX452, EC140-460
SUMITOMO
SH60-SH580, LS2600-LS4300