High Quality Metal Bearing 6212‑31‑6140 For Komatsu 6D140 6D140E‑3 6D140E‑5 QST30

Keywords: 6212‑31‑6140, Engine Bearing, 6212316140, 6D140 Bearing, Excavator Engine Spare Parts, Construction Machinery Metal Bearing

Product Overview

This heavy‑duty metal bearing 6212‑31‑6140 is a precision rotating support component specially manufactured for Komatsu 6D140, 6D140E‑3, 6D140E‑5 and QST30 diesel engines. It reduces friction between moving engine parts, bears radial and axial loads, maintains stable rotation of crankshaft and other moving assemblies. Adopted high‑strength wear‑resistant alloy metal material, fine‑finished surface and strict dimensional tolerance control. It effectively solves common faults such as abnormal engine knocking noise, shaft wear, high‑temperature friction damage and unstable rotation. It is the ideal aftermarket replacement part for engine overhaul and maintenance.

Detailed Specifications

Key Features & Advantages

• ✅ Exact OEM‑Matching Dimension Fully consistent with original inner diameter, outer diameter, thickness and mounting tolerance, direct installation without modification.
• ✅ Premium Wear‑Resistant Alloy Material Excellent load‑bearing capacity, anti‑fatigue performance, long‑term service life under high‑speed, high‑temperature engine working environment.
• ✅ High‑Precision Machined Surface Ultra‑smooth finished surface, low friction coefficient, effectively reduce shaft abrasion and power consumption loss.
• ✅ Good Heat‑Dissipation & Anti‑Deformation Performance Stable physical property at high working temperature, not easy to deform or crack under heavy load.
• ✅ Strict Factory Quality Inspection Every bearing is checked for dimension accuracy, surface defect and anti‑rust treatment before delivery.
• ✅ Cost‑Effective Engine Repair Solution Quickly replace worn‑out or damaged old bearing, eliminate abnormal engine noise, avoid further costly engine damage and shorten equipment downtime.

Application Scope

Compatible Engine Models: ‑ 6D140 ‑ 6D140E‑3 ‑ 6D140E‑5 ‑ QST30 Widely used for engine maintenance of excavators, bulldozers and other heavy‑duty construction machinery equipped with above engines.

Our Company Advantage

We are a professional supplier of full‑range excavator and heavy‑duty construction machinery spare parts. We supply engine bearings, crankshaft parts, cylinder components, water pumps, fuel pumps, sensors, hydraulic valves and undercarriage spare‑parts for Komatsu, Hyundai, Doosan, Hino, Hitachi, Sany, Cater-pillar, and other well‑known machinery brands. ‑ Large‑scale inventory of Komatsu engine spare‑parts ‑ Factory‑direct competitive wholesale price ‑ Fast shipment for in‑stock goods ‑ Support mixed‑order & one‑stop spare‑parts procurement ‑ Professional part‑number matching technical support service

Packaging & Shipping

‑ Individual anti‑rust oil treatment + sealed anti‑plastic bag + foam shock‑proof inner protection ‑ Outer reinforced hard carton for long‑distance sea‑transport protection ‑ Multiple shipping solutions: sea freight, air freight, express courier for small trial orders ‑ Export documents (Commercial Invoice, Packing List) can be provided.

Contact Us

If you need more Komatsu engine bearings, engine spare‑parts or other heavy machinery replacement components, please send your parts list to us. We will send you our best quotation promptly.