120BAR10DB Back To Back Angular Contact Ball Bearing 120×180×54mm for CNC Machine

• 120BAR10DB is a back-to-back(DB) matched set of angular contact thrust ball bearing with 30° contact angle. Made of GCr15 bearing steel, this open precision bearing is pre-configured for high speed operation, delivers high axial stiffness and handles bidirectional axial loads. It is widely used for ball screw support on high precision CNC machine tools.

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• 30° contact angle balances speed and axial stiffness
• DB back-to-back matched pair, preloaded for high rigidity
• Open structure suitable for oil-air lubrication
• High precision P4 grade for accurate positioning
• Low heat generation for continuous high-speed running

• CNC machining center ball screw supports
• High-speed precision machine tool spindles
• Precision grinding machinery
• Heavy duty ball screw drive assemblies
• Industrial high-precision positioning equipment

*Ready stock. Short lead time. Fast delivery. Send us your bearing list and let’s get started!

• 30 years professional bearing industry experience
• ISO certified strict quality inspection
• Flexible OEM & private label customization
• 3-5 days fast delivery for stocked bearings
• Full bearing series, universal interchangeable size
• Factory direct price & reliable after-sales service

*Need custom bearings? Share your drawings, specifications or requirements — we’ll find the right solution for you.