3209A Double Row Angular Contact Ball Bearing 45x85x30.2mm 30° Contact Open Type Stiff Bearing

1. Product Overview

3209A is open type double row angular contact ball bearing, dimension 45×85×30.2mm with 30° large contact angle. Equivalent to two single row angular contact bearings arranged back-to-back, saves axial installation space. It bears heavy radial load plus bidirectional large axial load and tilting moment, features high rotation rigidity and stable high-speed performance. Available with 2RS double rubber seal for dustproof & waterproof. Widely used in automotive transmissions, agricultural machinery gearboxes, textile equipment and small industrial reducers.

2. Technical Specifications

Model: 3209A
d:45mm, D:85mm, B:30.2mm
Contact angle:30°
Min fillet r:1.1mm
Dynamic load Cr:52kN, Static load C0r:41.5kN
Grease limiting speed:7500r/min
Net weight:0.64kg
Structure: Double row back-to-back arrangement, open type
Cage: Stamped steel cage
Material: GCr15 vacuum smelting bearing steel, hardness HRC60-65
Clearance: Standard CN, C3 customizable
Seal option: Open / 2RS double rubber sealed
Precision: P0 standard, P6 optional
Operating temperature: -30℃ ~ 120℃
Dimension drawings and durability test reports available on request.

3. Core Advantages

• Integrated double row design, smaller axial space than paired single row bearings
• 30° large contact angle carries heavy bidirectional axial load and anti-tilting moment
• High overall structural rigidity for stable positioning under complex composite loads
• Optional 2RS lip seals block dust, mud and moisture for harsh workshop environments
• Low friction steel cage supports continuous medium-high speed smooth rotation
• Standard metric interchangeable size, compatible with auto and general industrial assemblies
• Custom clearance grade, special grease and outer ring laser marking services available

4. Application Scenarios

• Automotive parts: Car transmission assemblies, steering intermediate shafts
• Agricultural machinery: Harvester gearboxes, farm power drive units
• Light industry: Textile looms, printing rotary transmission rollers
• General machinery: Small speed reducers, fan and pump spindle supports

Fit OEM assembly and aftermarket replacement of equipment requiring rigid bidirectional axial positioning.

5. Why Choose GQZ Bearing

25 years production experience of double row angular contact ball bearings. Vacuum smelting high-purity GCr15 steel with complete quenching and tempering heat treatment for stable hardness. Full OEM & ODM customization for clearance, seal type and special lubricant. Strict full-process inspection includes raw material hardness test, ultra-precision raceway grinding, steel ball sorting and noise aging test. 24-hour professional technical support for shaft housing matching, load calculation and periodic lubrication maintenance plans. Factory direct bulk price, stable spot inventory for global automotive and agricultural machinery buyers.

6. Quality Control

1. Raw material chemical composition and hardness inspection
2. Integral quenching and stress relief tempering to eliminate internal residual stress
3. CNC ultra-precision inner and outer ring raceway mirror grinding
4. High-precision steel ball screening and stamped steel cage forming
5. Dust-free assembly with multi-type grease filling options
6. Low-noise aging and continuous high-speed durability cycle testing
7. Full dimension inspection, anti-rust coating, neutral moisture-proof export carton packaging

Each batch passes rotation smoothness and vibration test to guarantee stable operation in dusty industrial and farm environments.

7. Get A Quote

Send inquiries for 3209A double row angular contact bearings used on auto transmissions, agricultural gearboxes and textile machinery.
Services after inquiry:

1. Standard quotation delivered within 24 working hours
2. Technical guidance for shaft tolerance matching and lubrication cycle arrangement
3. Upgrade options: P6 precision grade, C3 loose clearance, high-temperature synthetic grease
4. Competitive factory bulk price for large quantity orders

Please state order quantity, rotating speed and working environment for complete quotation documents.

8. FAQ