Bearing Cups: Bore Diameter 10-50 mm, Outer Diameter 15-70 mm

Component Specifications

Definition

Bearing cups are critical components in cross/yoke assemblies, serving as outer races or housings that contain and position rolling-element bearings (typically needle or roller bearings). They provide structural support, maintain bearing alignment under load, protect bearings from contaminants, and facilitate lubrication. In universal joint applications, bearing cups enable the articulation of drive shafts while transmitting torque efficiently.

Working Principle

Bearing cups work by providing a hardened, precisely machined surface for bearing elements to roll against, distributing radial and axial loads evenly across the bearing assembly. They maintain concentricity and preload, reducing friction and wear while allowing controlled movement in mechanical linkages.

Materials

Typically made from case-hardened alloy steels (e.g., AISI 8620, 4140) or through-hardened steels (e.g., 52100). Surface hardness: 58-64 HRC; core hardness: 28-35 HRC for toughness. May include corrosion-resistant coatings like zinc plating or phosphate treatments.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Width	12-40 mm
Bore Diameter	10-50 mm
Load Capacity	Dynamic: 5-50 kN, Static: 10-100 kN
Outer Diameter	15-70 mm
Surface Finish	Ra 0.4-0.8 μm
Operating Temperature	-40°C to +120°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 15, DIN 620

Parent Products

This component is used in the following industrial products

Cross/Yoke Assembly

The central rotating component of a universal joint that transmits torque between shafts at varying angles.

View Product Details

Engineering Analysis

Risks & Mitigation

Improper installation causing misalignment
Inadequate lubrication leading to premature wear
Material fatigue under cyclic loading
Contamination ingress reducing bearing life

FMEA Triads

Trigger: Incorrect press-fit installation
Failure: Cup deformation or cracking
Mitigation: Use proper tooling and follow manufacturer torque specifications; implement installation training.

Trigger: Excessive load or shock
Failure: Brinelling or spalling of raceway
Mitigation: Design with adequate safety factors; use load monitoring systems.

Trigger: Corrosive environment
Failure: Pitting and reduced structural integrity
Mitigation: Apply protective coatings; select corrosion-resistant materials; implement regular inspections.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

IT6 to IT7 for bore and outer diameters; concentricity within 0.02 mm

Test Method

Dimensional inspection with CMM, hardness testing per ISO 6508, fatigue testing per ISO 15242

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Bearing Cups

Manufacturer profiles associated with Bearing Cups.

Sourcing Bearing Cups from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Clutch Disc

A clutch disc is a friction component in clutch-brake systems that engages and disengages power transmission between rotating shafts.

Synchronizers

Synchronizers are precision components in manual transmissions that enable smooth gear shifting by equalizing rotational speeds between gears and shafts.

Brake Disc (Rotor)

A rotating disc in disc brake systems that creates friction with brake pads to slow or stop vehicle motion.

Main Bearing Journals

Main bearing journals are precision-machined cylindrical surfaces on a crankshaft that rotate within main bearings to support rotational motion in internal combustion engines.

Frequently Asked Questions

What is the primary function of a bearing cup in a cross/yoke assembly?

The bearing cup houses and supports bearings, maintaining alignment and distributing loads to enable smooth rotational motion in universal joints.

How do I select the right bearing cup for my application?

Consider load capacity, speed, environmental conditions, material compatibility, and adherence to standards like ISO or DIN. Match dimensions and hardness to bearing specifications.

Can bearing cups be reused after bearing failure?

Generally not recommended. Wear, scoring, or deformation from previous use can compromise performance. Always inspect and replace if any damage is detected.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Bearing Cups