7230BDBD Back-to-Back Matched 30° Contact Angle Double Set Angular Contact Ball Bearing 150×270×90mm For Heavy Machine Tool Spindle & Industrial Reducer

7230BDBD is a back-to-back (DB) pre-matched double set angular contact ball bearing, composed of two 7230BD single-row bearings with 30° contact angle, overall dimension 150×270×90mm.

The DB pairing structure provides excellent tilting rigidity and strong overturning moment resistance, capable of bearing heavy radial load and bidirectional axial load simultaneously. Factory pre-adjusted clearance ensures direct installation without on-site debugging. It is widely used on heavy machine tool spindles, large reducers and construction machinery transmission systems requiring high rigidity.

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👉 Full technical data and installation drawings available upon request

• DB back-to-back pairing delivers outstanding tilting rigidity, strong resistance to overturning moment
• 30° large contact angle BD structure enhances 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 bearing arrangement shares load evenly, improves overall stability and service life
• Full heat treatment ensures high hardness, excellent wear resistance and fatigue performance
• Support customized preload grade, OEM laser marking and neutral export wooden case packaging

👉 Helps reduce maintenance cost and improve equipment operation stability

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

👉 We focus on quality, reliability, and long-term partnership

• 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

👉 Ensuring consistent stable performance for every matched bearing set

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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