Tapered Roller Bearing

Tapered Roller Bearings: Single Row, Double Row & Four Row — Metric and Inch Series

Longfei Bearing is a specialist manufacturer of tapered roller bearings based in Linqing, Shandong — one of China's most established bearing production regions. Our range covers metric series and inch series configurations across single-row, double-row, and four-row designs, engineered to handle combined radial and axial loads in automotive, industrial, and heavy-machinery applications.

A tapered roller bearing consists of four key components: the cone (inner ring assembly with rollers and cage), the cup (outer ring), the tapered rollers, and the cage. The raceway surfaces of both the cone and cup, together with the rolling surfaces of the rollers, are all segments of cones whose apex lines converge at a single point on the bearing axis. This geometry ensures true rolling contact with minimal sliding friction and allows the bearing to carry both radial loads and axial (thrust) loads simultaneously.

Because the cone assembly and cup are separable, installation, dismounting, and in-service adjustment of bearing clearance or preload can be performed independently on each component — a major practical advantage over non-separable bearing types.Get more about Tapered Roller Bearings.

Key Technical Characteristics

High combined load capacity — The tapered raceway geometry allows simultaneous radial and axial load transmission, making these bearings suitable for applications where loads arrive from multiple directions.

Adjustable internal clearance — Because the cone and cup are mounted separately, internal clearance or preload can be set precisely during assembly and readjusted during maintenance without replacing the bearing.

Separable and interchangeable components — Cones and cups can be inspected, replaced, or interchanged independently, reducing total cost of ownership in high-maintenance environments.

Wide operating temperature range — Standard bearings operate from −40 °C to +120 °C. High-temperature cage and grease options are available on request for applications above this range.

Precision grade options — Standard production is to P0 (Normal) tolerance. P6, P5, and P4 precision grades are available for machine tool, aerospace, or other precision-demanding applications.

Applications by Industry

Automotive and commercial vehicles — Wheel hubs for passenger cars, light trucks, and heavy commercial vehicles; differential pinion shafts; transfer case output shafts; gearbox input and output shafts.

Agricultural machinery — Tractor drive axles, harvester gearboxes, implement power take-off (PTO) shafts.

Construction and mining equipment — Wheel loader axles, excavator swing drives, underground mining vehicle drivetrains.

Industrial machinery — Conveyor drive rolls, pump and compressor shafts, papermaking machinery rolls, gearboxes across general industry.

Steel and metals processing — Roll neck bearings in rolling mills (four-row configurations); straightening machine rolls; coiler and decoiler drives.

Railway — Axlebox bearing housings for freight wagons and locomotives where robust combined-load capacity is required.

Not sure if this Tapered Roller Bearings is suitable for your application? Contact us for professional selection support and technical guidance.

Metric Series vs. Inch Series

1. Metric series

Longfei's metric tapered roller bearings are manufactured to ISO 355 and DIN 720 standards. The bearing number indicates bore size, outer diameter, and width according to standardised dimension series. Metric cones and cups with the same designation are internationally interchangeable with equivalents from SKF, Timken, NSK, KOYO, FAG, and other major brands.

2. Inch Series

Inch-series tapered roller bearings are designed to ABMA (American Bearing Manufacturers Association) standards and are predominantly used in North American markets and applications originating from American equipment designs. The cone and cup are supplied as matched sets, fully interchangeable with Timken and other major inch-series suppliers. Longfei supplies a broad range of inch-series cup-and-cone assemblies for automotive, agricultural, and industrial equipment.

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Why Choose Longfei Bearing

Longfei Bearing has been manufacturing tapered roller bearings at the Panzhuang Bearing Industrial Park, Linqing — a region with decades of specialised bearing manufacturing heritage. Our production capabilities include:

Materials and metallurgy — GCr15 chromium bearing steel with tightly controlled chemistry and through-hardening to HRC 60–64, ensuring consistent fatigue life across production batches.

Dimensional accuracy — In-process CMM verification; surface roughness measurement on all raceway and roller contact surfaces; 100% outgoing dimensional inspection.

Quality system — ISO 9001 certified quality management. Products conform to ISO 355 for metric series.

OEM and ODM flexibility — We accept custom specifications including non-standard bore/OD dimensions, special cage materials (pressed steel, machined brass, polymer), grease pre-fill, rubber seal options, and private-label branding. Minimum order quantities are negotiable for established trading relationships.

Delivery — Standard series held in inventory for rapid dispatch. Custom production lead times confirmed at quotation stage.

Contact us

If you are looking for high-quality tapered roller bearings for heavy-duty and precision applications, we are ready to support your project with reliable performance and consistent supply. Whether you need standard models, bulk orders, or customized solutions, our team can provide fast response and professional service. Contact us today to get detailed specifications and a competitive quotation tailored to your requirements.