7226BDBD Back-to-Back Matched 30° Contact Angle Double Set Angular Contact Ball Bearing 130×230×80mm For Heavy Machine Tool Spindle & Industrial Gear Reducer
7226BDBD is a DB back-to-back pre-matched double set angular contact ball bearing, assembled by two 7226BD single-row bearings with 30° contact angle, overall dimension 130×230×80mm.
The DB pairing structure delivers excellent tilting rigidity and strong overturning moment resistance, capable of carrying heavy radial load and bidirectional axial load at the same time. Factory pre-adjusted clearance ensures direct installation without on-site debugging. It is widely applied on heavy machine tool spindles, large gear reducers and construction machinery transmission systems requiring high rigidity.
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| Specifiion | Value |
|---|---|
| Model | 7226BDBD (two 7226BD bearings in DB arrangement) |
| Inner Diameter (ID) | 130mm |
| Outer Diameter (OD) | 230mm |
| Single Bearing Width | 40mm |
| Total Assembly Width | 80mm |
| Contact Angle | 30° (BD type) |
| Structure | Back-to-back DB matched double set angular contact ball bearing, pressed steel cage |
| Material | GCr15 bearing steel |
| Basic Dynamic Load Cr (double set) | 278kN |
| Basic Static Load C0r (double set) | 356kN |
| Grease Limiting Speed | 3200 r/min |
| Total Weight | 14.8kg |
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- DB back-to-back pairing provides outstanding tilting rigidity, strong resistance to overturning moment
- 30° large contact angle BD structure improves bidirectional axial load capacity for heavy working conditions
- Factory pre-matched clearance, ready to install, saves on-site adjustment time and avoids assembly error
- Double set arrangement distributes load evenly, enhances overall operation stability and service life
- Full heat treatment ensures high surface hardness, excellent wear resistance and fatigue performance
- Support customized preload grade, OEM laser marking and neutral export wooden case packaging
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This matched bearing set is widely used in:
- Heavy CNC machine tool spindles and milling head assemblies
- Large industrial gear reducers and heavy transmission systems
- Construction machinery rotary parts and heavy loading equipment
- Metallurgical rolling mill auxiliary roller assemblies
- High-power motor and pump bearing supports
???? Ideal for customers looking for high rigidity matched angular contact bearing solutions
- 25+ years experience manufacturing matched angular contact ball bearing assemblies
- Complete stock of 72 series BD single & DB/DF/DT matched bearing sets
- Strict pairing tolerance control, consistent preload and clearance for every set
- 100% dimensional, noise and load testing before shipment
- Professional technical matching support reply within 24 hours
- Stable mass supply for machine tool factories and reducer manufacturers
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- Raw material composition & hardness inspection
- Precision grinding and heat treatment process monitoring
- Contact angle tolerance and pairing clearance calibration test
- DB set tilting rigidity and preload consistency test
- Rotation noise and temperature rise endurance testing
- Anti-rust treatment and export wooden box packaging inspection before delivery
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Looking for reliable DB matched angular contact ball bearing supplier?
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- Fast quotation within 24 hours
- Engineer one-on-one equipment matching support
- Custom preload grade and clearance service
- Competitive factory bulk wholesale price
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