C&U Company Limited

The deep groove ball bearing is the most widely used type of rolling bearing. It consists of an inner ring, an outer ring, steel balls and a cage; its simple structure, low friction and high limiting speed make it ideal for high-speed and low-noise applications. It mainly carries radial loads while also accommodating limited bidirectional axial loads.

Bore diameter d: 3-320 mm; Outside diameter D: 7-400 mm; Width B: 3-45 mm; Dynamic load rating Cr: 0.2-176 kN; Static load rating Cor: 0.13-255 kN; Limiting speed (oil lubrication): 1300-58000 r/min; Limiting speed (grease lubrication): 1600-68000 r/min

• Automotive motors and transmissions
• Home appliances
• Power tools
• Industrial motors
• Pumps and fans
• Agricultural machinery

In an angular contact ball bearing, the raceways form a contact angle with the balls, allowing the bearing to carry combined radial and one-way axial loads; the larger the contact angle, the higher the axial load capacity. These bearings are usually mounted in pairs to take bidirectional axial forces and are widely used in high-speed, high-precision machine tool spindles and gearboxes.

Bore diameter d: 10-180 mm; Outside diameter D: 26-300 mm; Width B: 8-124 mm; Dynamic load rating Cr: 1-445.5 kN; Static load rating Cor: 1-616.4 kN; Limiting speed (oil): 2000-42000 r/min; Limiting speed (grease): 2600-30000 r/min

• Machine tool spindles
• Automotive transmissions
• Turbochargers
• Precision gearboxes
• Motorized spindles

The self-aligning ball bearing has two rows of balls and a common sphered raceway in the outer ring. It automatically compensates for misalignment and shaft deflection between the shaft and housing bore, carries mainly radial loads with limited axial capacity under small misalignment, and offers low friction and relatively high speeds.

Design: double-row self-aligning; Bore diameter range: 10-100 mm; Misalignment compensation angle: ±2.5°; Cage: steel sheet/nylon/brass; Precision class: P0/P6/P5

• Textile machinery
• Agricultural machinery
• Woodworking machinery
• Conveyors
• Ventilation equipment

A thrust ball bearing consists of a shaft washer, a housing washer and balls. Designed specifically for one-direction or two-direction axial loads, it cannot carry radial loads and has a relatively low limiting speed. It suits purely axial load positions such as crane slewing supports, vertical water pumps and steering mechanisms.

Bore diameter d: 12.2-61.6 mm; Outside diameter D: 41-97.35 mm; Width B: 11.6-19.3 mm; Dynamic load rating Cr: 26.4-52.3 kN; Static load rating Cor: 12.46-18.2 kN; Limiting speed (grease): 20 r/min

• Automotive steering columns
• Vertical water pumps
• Crane slewing supports
• Machine tool feed screws
• Rotary tables

The insert ball bearing has a sphered outside surface on its outer ring that self-aligns within the concave seat of the housing unit. It mounts directly onto straight shafts, offers easy installation and maintenance together with effective sealing, and is normally supplied as complete bearing units.

Design: insert ring / housed unit; Bore diameter range: 12-100 mm; Housing types: pillow block / flange / circular / take-up; Sealing: double seals; Misalignment angle: ±2°

• Agricultural machinery
• Food machinery
• Ventilation equipment
• Light-industry production lines
• Conveying equipment

Cylindrical roller bearings use cylindrical rollers in line contact, giving high radial load capacity and rigidity for heavy radial loads at high speeds. Designs include NN, N, NF, NJ and NU series; some ribbed variants can also accommodate limited axial forces.

Bore diameter d: 24-900 mm; Outside diameter D: 42.51-1090 mm; Width B: 12-279.4 mm; Dynamic load rating Cr: 18.8-1626 kN; Static load rating Cor: 17-3924 kN; Limiting speed (oil): 1300-16000 r/min; Limiting speed (grease): 1100-13000 r/min

• Automotive transmissions
• Industrial gearboxes
• Electric motors
• Machine tool spindles
• Construction machinery
• Railway locomotives

In a tapered roller bearing, the rollers and raceways are in conical contact, so the bearing carries large combined radial and one-way axial loads. These bearings are usually mounted in pairs (face-to-face or back-to-back) to take bidirectional axial forces and are widely used in automotive wheel ends and final drives.

Bore diameter d: 15-360 mm; Outside diameter D: 35-480 mm; Width B: 11.75-145 mm; Dynamic load rating Cr: 1-1049.8 kN; Static load rating Cor: 1-2376.5 kN; Limiting speed (oil): 800-15000 r/min; Limiting speed (grease): 600-13000 r/min

• Automotive wheel ends
• Automotive final drives
• Axles
• Industrial gearboxes
• Rolling mills

Spherical roller bearings use double rows of asymmetrical sphered rollers. They self-align and carry very large radial loads together with certain axial loads, with excellent shock resistance. They suit shaft supports under heavy loads, misalignment and impact conditions.

Bore diameter d: 25-300 mm; Outside diameter D: 52-500 mm; Width B: 18-160 mm; Dynamic load rating Cr: 45.1-2940 kN; Static load rating Cor: 40.5-4690 kN; Limiting speed (oil): 808-14450 r/min; Limiting speed (grease): 825-11050 r/min

• Mining machinery
• Metallurgical equipment
• Paper machinery
• Vibrating screens
• Wind turbine main shafts
• Construction machinery

Needle roller bearings use slender needle rollers as rolling elements, giving a compact radial section and high load capacity for positions with limited radial space. Types include solid-ring, drawn-cup and needle roller bearings without inner rings; they are widely used in automotive transmissions and agricultural machinery.

Bore diameter d: 5-58 mm; Outside diameter D: 9-74 mm; Width B: 2-33 mm

• Automotive transmissions
• Motorcycle engines
• Engine balance shafts
• Universal joints
• Agricultural drivelines
• Compressors

A thrust spherical roller bearing comprises a housing washer, a shaft washer and sphered rollers arranged asymmetrically. It carries heavy one-way axial loads while also accommodating radial loads and self-aligning, making it suitable for heavily loaded, impact-prone vertical equipment requiring alignment.

Design: single-direction thrust self-aligning roller; Bore diameter range: 60-1000 mm; Load direction: one-way axial + radial; Self-aligning capability: yes; Cage: brass/steel

• Hydraulic generators
• Crane hooks
• Extruders
• Marine propulsion
• Mining machinery

The C&U TM series of automotive transmission bearings is developed for manual, automatic and dual-clutch transmissions. Covering needle roller, cylindrical roller and ball bearing designs, it meets requirements for high speed, varying loads and long service life, serving transmission input/output shafts, gear shafts and synchronizer positions.

Series: TM; Application: transmission shafts / synchronizers; Precision class: P5/P6; Enhanced features: high speed / fatigue resistance; Lubrication: grease / oil bath

• Manual transmissions
• Automatic transmissions
• Dual-clutch transmissions
• NEV reduction gearboxes
• Power take-offs

The SA series is a range of high-precision, low-noise deep groove ball bearings for alternator rotor shafts. Optimized raceway geometry, low-noise grease and sealed structures ensure quiet, long-life operation of alternators at high rotational speeds.

Series: SA; Design: deep groove ball bearing; Speed characteristic: high speed, low noise; Sealing: non-contact / contact seals; Precision class: P5/P6

• Automotive alternators
• Integrated starter-generators
• Idle start-stop generators
• NEV range-extender generators

Rocker arm bearings are used in engine valve rocker mechanisms, where they withstand reciprocating and swinging forces and demand high rigidity, impact resistance and long life. C&U supplies pin-type, needle roller and special-structure bearings to match different engine models.

Design: needle roller / solid ring; Application: engine rocker arms; Features: impact resistant / high rigidity; Precision class: P5/P6

• Automotive engines
• Motorcycle engines
• Diesel engines
• General-purpose engines

The shock absorber bearing (top mount / plane bearing) sits at the top of the automotive damper, where it carries axial and swinging loads and isolates road vibration. Low friction, resistance to mud and water, and long service life are essential.

Design: thrust ball / needle roller plane bearing; Position: upper damper support; Features: low friction / sealed against dust; Duty: axial + swinging; Precision class: P5/P6

• Passenger car suspension
• Shock absorbers
• Chassis supports

This bearing supports the electromagnetic clutch pulley of the automotive air-conditioning compressor, operating under high speed, high temperature and alternating magnetic fields. Low noise, high reliability and long service life are required.

Design: double-row angular contact ball bearing; Duty: high speed / high temperature; Features: low noise / sealed; Precision class: P5/P6

• Automotive A/C compressors
• Electromagnetic clutches
• NEV thermal-management compressors

The wheel hub bearing unit integrates the bearing with flanges, pre-adjusted, pre-lubricated and sealed, for direct mounting on the wheel. It carries combined axial and radial vehicle loads plus bending moments; third-generation hub units integrate an ABS sensor ring, making them key safety components of the vehicle running gear.

Design: generation I / II / III hub units; Integration: flanges / ABS tone ring; Sealing: multi-lip seals; Precision class: P5/P6

• Passenger car wheels
• Commercial vehicle wheels
• NEV drive wheels
• Trailer axles

The water pump shaft bearing is a combined bearing for engine coolant pump shafts, typically integrating a ball bearing section with a sliding or roller section on the same shaft. It supports the pump impeller shaft and carries pulley radial and axial forces.

Design: shaft bearing assembly (ball + sliding section); Application: engine coolant pumps; Features: temperature resistant / sealed; Precision class: P5/P6

• Engine water pumps
• Cooling systems
• NEV thermal-management pumps

Constant velocity joints (ball Rzeppa type / tripod type) transmit torque at constant speed while the steering and suspension articulate. C&U supplies outer races, inner races, cages, balls and complete assemblies for drive half-shafts.

Type: ball (Rzeppa) / tripod; Application: drive half-shafts; Features: constant-speed transmission / large articulation angle; Components: outer race / inner race / cage / balls; Max articulation angle: 45°

• Passenger car drive shafts
• NEV half-shafts
• All-wheel-drive systems
• Steering drive axles

The clutch release bearing takes the axial thrust during clutch actuation while rotating with the release levers. Low friction, heat resistance and fast response are required; C&U offers both mechanical and hydraulic release bearing units.

Design: release bearing unit; Actuation: mechanical / hydraulic; Duty: axial thrust + rotation; Features: low friction / heat resistant; Precision class: P5/P6

• Manual transmission clutches
• Commercial vehicle clutches
• AMT
• Agricultural machinery

The single-row ball slewing bearing carries loads through a single row of balls between inner and outer raceways. Compact and lightweight, it simultaneously carries axial loads, radial loads and overturning moments, and suits medium-to-light duty slewing mechanisms.

Design: single-row ball type; Raceway: single row of balls; Loads: axial / radial / overturning moment; Gear: internal / external / ungeared; Bore diameter range: 200-5000 mm

• Small slewing platforms
• Construction machinery slewing
• Solar tracking mounts
• Medical equipment

The single-row crossed-ball slewing bearing arranges balls in a crossed pattern, providing high rigidity in a compact structure. It suits slewing positions where space is limited but high rigidity is needed, and carries combined loads.

Design: single-row crossed balls; Arrangement: crossed balls; Loads: axial / radial / overturning moment; Features: high rigidity / compact; Bore diameter range: 200-4000 mm

• Industrial robots
• Precision turntables
• Radar antennas
• CNC rotary tables

In the double-row different-diameter ball slewing bearing, upper and lower rows of balls with different diameters separately carry axial and radial or overturning loads. It offers strong load capacity and high rigidity, and is a common choice for medium-to-heavy slewing equipment.

Design: double-row different-diameter balls; Raceway: upper and lower ball rows; Loads: high axial / radial / overturning moment; Gear: internal / external; Bore diameter range: 300-5000 mm

• Excavators
• Crawler cranes
• Port machinery
• Concrete pump trucks

The three-row roller slewing bearing has three independent roller rows that separately carry axial, radial and overturning loads, delivering the highest load capacity and service life. It is used for extra-heavy-duty large slewing equipment.

Design: three-row rollers; Loads: axial / radial / overturning moment carried by separate rows; Features: extra-heavy-duty / long life; Bore diameter range: 500-6000 mm

• Large crawler cranes
• Offshore platforms
• Tunnel boring machines
• Wind turbine pitch/yaw

Linear bearings work with guide shafts to achieve low-friction linear motion. C&U offers sleeve-type, flange-type and open linear bearings and assemblies for linear motion positions in automation and precision transmission.

Type: sleeve / flange / open linear bearings; Mating: linear motion shafts; Features: low friction / high speed; Precision class: P5/P6

• Automation equipment
• CNC machine tools
• 3D printing equipment
• Industrial robots

The shaft sleeve (sliding bearing bushing) is an antifriction sleeve without rolling elements, used for shaft-to-bore clearance fits at low speeds, oscillating or intermittent motion. It is simple in structure and low in cost.

Type: sliding bushing / oil-free lubricating bushing; Materials: copper-based / composite / engineering plastics; Duty: low speed / oscillation; Form: split / solid; Shaft diameter range: 5-200 mm

• Hinge points
• Agricultural machinery
• Construction machinery pins
• Automotive components

A spherical plain bearing has inner and outer spherical surfaces in sliding contact, allowing large angular movements while carrying combined radial and axial loads. It is used for oscillating and low-speed slewing positions.

Type: radial / angular contact / thrust spherical plain bearings; Motion: large swing angle; Loads: radial / axial; Lubrication: self-lubricating / oil; Tilt angle: 3-15°

• Construction machinery cylinder hinge points
• Wind turbine pitch systems
• Aircraft linkages
• Railway bogies

Bearing rings are the inner and outer rings of a bearing, formed by forging, heat treatment and precision grinding. They constitute the raceways and determine bearing precision and life, being the core components of a bearing.

Type: inner ring / outer ring; Process: forging + heat treatment + grinding; Material: high-carbon chromium bearing steel GCr15; Precision: matched to P0-P5

• Bearing manufacturing
• Spare parts for repair
• Precision machinery

Cages separate and guide the rolling elements, maintaining correct spacing while reducing friction and noise. C&U supplies pressed steel, brass and engineering plastic cages adapted to all types of bearings.

Materials: pressed steel / brass / nylon; Types: ribbon / crown / riveted; Function: guiding and equally spacing rolling elements; Compatibility: all bearing types; Compatible bearing bore: 3-320 mm

• Bearing manufacturing
• High-speed motors
• Automotive bearings

Bearing seals prevent grease leakage and ingress of contamination. C&U supplies contact and non-contact rubber/metal seals that extend bearing life under harsh operating conditions.

Type: contact / non-contact / labyrinth seals; Materials: NBR / FKM / metal; Function: dust and water proofing / grease retention; Compatibility: all bearing units; Operating temperature: -40 to +120 °C

• Hub units
• Automotive bearings
• Agricultural bearings

Rolling elements — steel balls and rollers — are the core components that transmit load in a bearing. C&U manufactures them from high-carbon chromium steel, ceramics and other materials by precision lapping; they determine the bearing's load capacity and speed performance.

Type: steel balls / cylindrical rollers / tapered rollers / spherical rollers / needle rollers; Materials: GCr15 / ceramics; Precision: G10-G20 grades; Surface: precision lapped

• Bearing manufacturing
• Precision transmission
• High-speed spindles