Bottom Roller for Kubota U35-4 Excavator Undercarriage Replacement Track Roller

Part Type: Bottom Roller. Yield strength σ0.2 (MPa):≥310. Roller, 45# carbon steel or 40Cr, quenched HRC25-30, surface quenched HRC52-58, hardened to a depth of 2-3mm. Bolt, grade 12.9, HRC45-52. Side cover : QT450-10.

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