7210BEP Single Row Angular Contact Ball Bearing 50×90×20 40° Contact Angle High Speed Spindle Bearing

1. Product Overview

7210BEP is single row angular contact ball bearing with 40° large contact angle, standard metric dimension d50×D90×B20mm. Suffix explanation: B stands for 40° contact angle design, E represents optimized internal geometric structure for higher load capacity, P indicates glass fiber reinforced nylon solid cage.
Large 40° contact angle enables the bearing to bear heavy one-way axial load together with radial load, outstanding axial rigidity compared to 15° and 25° contact angle types. The internal optimized raceway and ball matching structure reduces contact stress, suppresses heat generation during high-speed continuous rotation. Nylon cage features light weight, low friction and good self-lubricating compatibility. This bearing cannot bear axial force reversely alone; two or more sets can be installed back-to-back, face-to-face or tandem to withstand bidirectional axial thrust. Widely applied to CNC machine tool spindles, industrial gearboxes, compressor rotors, pump transmission shafts and high-speed precision rotating equipment. All inner ring, outer ring and steel balls adopt fully quenched GCr15 bearing steel with ultra-precision superfinished raceway surface for stable long-cycle precision operation.

2. Technical Specifications

Model: 7210BEP
Boundary dimensions(mm): Bore d=50, Outer D=90, Width B=20
Contact angle: 40°
Structure: Single row angular contact ball bearing, glass fiber nylon solid cage, open type without seals
Raw material: GCr15 high carbon chromium bearing steel for inner ring, outer ring and steel balls; PA66 nylon cage
Basic dynamic radial load Cr: 32.6kN
Basic static radial load C0r: 24.2kN
Fatigue load limit Pu: 3.18kN
Limiting rotating speed: Grease 6200 r/min, Oil 8000 r/min
Single bearing net weight: 0.47kg
Minimum fillet radius r=1.1mm
Mounting shoulder reference: da max=57mm, Da min=83mm, Da max=86mm
Operating temperature range: -30℃ ~ 120℃
Standard clearance: CN normal clearance, C3 enlarged clearance customizable
Complete spindle pairing installation drawings, axial preload matching guide and long-cycle high-speed rotation durability test reports can be provided upon customer request.

3. Core Advantages

• 40° large contact angle design, superior one-way axial bearing capacity and axial rigidity, ideal for equipment with large axial thrust such as main spindles and heavy-duty gearboxes.
• E optimized internal geometry, rational steel ball diameter and raceway curvature matching, effectively reduce contact pressure and rolling friction loss, lower temperature rise under long high-speed operation.
• PA66 glass fiber reinforced nylon cage, light weight, small centrifugal force at high speed, good impact resistance and compatibility with various lubricants, no abnormal noise.
• Superfinished mirror raceway surface, uniform stress distribution, excellent anti-fatigue and anti-peeling performance, maintain stable rotation precision for a long time.
• Fully quenched GCr15 steel components reach HRC60–65 hardness, strong wear resistance, extend overhaul cycle of high-precision processing equipment.
• Multiple combined installation modes available: back-to-back, face-to-face and tandem arrangement to meet bidirectional heavy axial load and multi-stage transmission requirements.
• Standard unified metric installation dimension, fully interchangeable with global 7210 series angular contact ball bearings, no modification to shaft and housing during spare parts replacement.
• Comprehensive customized service: P4/P5 high precision upgrade, C3 clearance adjustment, OEM laser marking on outer ring surface, neutral export carton anti-rust packaging, high-temperature extreme pressure grease pre-filling.

4. Application Scenarios

7210BEP 40° high-rigidity angular contact ball bearing is core precision composite load rotating spare part for high-speed industrial transmission and processing equipment:

• CNC vertical machining center, engraving machine main spindle paired bearing assemblies
• Medium and heavy industrial gear reducer, transmission gearbox high-speed shaft matching units
• Screw air compressor rotor support, hydraulic oil pump high-speed rotating positions
• Precision printing equipment roller transmission, textile high-speed spinning machine spindle components
• Small high-speed centrifugal equipment, testing instrument precision rotating bearings

Aftermarket interchangeable 7210 series single row large contact angle angular contact bearing
Cost-effective high-rigidity heavy axial load bearing solution for machine tool spindle manufacturers, gearbox OEM and precision machinery maintenance factories bulk procurement.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience of 7200 series angular contact ball bearings including 7210BEP
• 7210BEP fully dimensionally interchangeable with international standard 40° contact angle angular contact bearings, consistent radial-axial load rating, high-speed tolerance and cage matching standards.
• Complete OEM & ODM customization service supporting P4 super precision grade, C3 clearance adjustment and high-temperature resistant grease filling.
• Strict full pre-delivery inspection flow: GCr15 raw material metallographic & hardness test, steel ball dimensional sorting screening, long-cycle high-speed rotation aging test, spindle preload alternating load fatigue wear simulation test.
• Professional angular contact bearing engineering team provides one-on-one radial-axial composite load calculation, multi-bearing pairing preload scheme and spindle shaft installation technical guidance within 24 working hours.
• Stable large-scale mass production workshop with competitive factory direct bulk wholesale price for large batch single model orders, long-term stable supply for global machine tool, compressor and gearbox spare parts buyers.

We specialize in 40° large contact angle high-rigidity angular contact structure, E optimized internal geometry + nylon solid cage design, universal metric interchangeable mounting dimension standard and long-term win-win cooperation with high-speed precision transmission equipment suppliers.

6. Quality Control

• Raw material chemical composition, internal flaw and hardness inspection for GCr15 bearing steel inner ring, outer ring and steel ball blanks
• Precision forging, multiple tempering stress relief, multi-step ultra-precision inclined raceway grinding process for inner and outer rings
• Steel ball high-temperature quenching, mirror polishing and high-precision automatic dimensional sorting production line
• Glass fiber nylon cage injection molding, automatic steel ball assembly process, strictly control internal ball running clearance and circumferential uniform distribution
• Targeted classified performance testing: 7210BEP long-cycle high-speed continuous rotation aging test, repeated spindle alternating radial-axial load fatigue test, high-temperature grease long-cycle durability detection
• Full dimensional tolerance, surface crack and raceway roughness recheck before anti-rust oil coating and export carton moisture-proof packaging shipment

Every production batch of 7210BEP bearings undergoes full sampling machine tool spindle high-speed simulation rotation test to guarantee stable long-term high-rigidity composite radial-axial load support performance in precision processing and high-speed transmission equipment.

7. Get A Quote Now

If you need 7210BEP 40° large contact angle high-speed angular contact ball bearings for CNC spindle manufacturing, gearbox assembly and precision machinery maintenance bulk matching, send your purchase inquiry directly.
You will receive full professional supporting services after submitting inquiry:

• Fast official factory sealed formal quotation reply within 24 working hours
• One-on-one radial-axial composite load calculation, multi-bearing back-to-back/face-to-face pairing preload scheme and spindle shaft installation technical guidance from professional angular contact bearing engineers
• Customized bearing performance solutions including P4 high precision upgrade and C3 enlarged clearance options
• Competitive direct factory bulk wholesale price for large-volume 7210BEP single model orders

Provide your required purchase quantity, equipment rotation speed and axial thrust working environment to obtain detailed formal quotation document.

8. FAQ