Idlers are an essential piece of any steel track or rubber track construction equipment undercarriage. NBSJ offers a range of products from simple idler wheels or completely assembled idlers that are pre-filled with oil and factory sealed. These pre-assembled idlers are better than typical replacement parts and make the installer and operator’s jobs significantly easier. Our pre-assembled idlers are available in complete idler groups including the arms, brackets, or direct bolt-on upgrades for low hassle installation.
Front Idlers (Track Idlers)
NBSJ Parts carries front idlers that are made from high-quality steel and heat-treated to offer consistent quality and performance. Our track idler product offerings are available in a variety of configurations:
idler body idler with bushings and shaft idler with collars idler with fork idler with tensioning unit
At NBSJ, all idlers are induction-hardened on the tread for a long life. The surface hardness is 52-57HRC, the induction depth is designed scientifically, varying from 3mm to 7mm.
Roller body material is SCMn3A, which is the same high-strength steel that is adopted in OEM factories in Japan.
Roller shaft: We invest 40% more to machine the surface roughness to Ra 0.2-0.4, much higher standard than Ra 0.8 or above.
Seal kits: We invest 30% more, adopting high quality seal kits that with 2% of Mo (molybdenum) in the material, the lifetime is around 5000 hours, which is 2000-3000 hours longer than usual.
Bi-metal copper bushing: Copper layer is as thick as 0.6mm, rather than 0.4mm or thinner, and lifetime is 5000 hours, which is at least 2000 hours higher than usual.
Lubricant oil: We use SAE85, ensuring the well function of idlers at temperature -40℃ to 110 ℃, that is to say, the oil would not freeze at cold working conditions nor resolve at high temperature.
Forging Idlers are available for following models: CAT312,CAT320,CAT325, PC200-5, PC300-5,SK200,EX200-1/3/5, ZX210,ZX200,EC210, EC290,EC360. Compared to Casting Idlers (i.e.,conventional idlers), forging idlers are 30% longer in lifetime, also weighs lower.