GQZ 71814ACD/DB Ultra-Thin Angular Contact Ball Bearing 70×90×10mm DB Back-To-Back Matched Bearing Set
The 71814ACD/DB single row angular contact ball bearing is supplied as a factory pre-matched back-to-back (DB) duplex set with 25° contact angle. The ultra-thin 718 series cross-section saves radial installation space, and back-to-back arrangement delivers excellent rigidity to bear radial load and bidirectional axial loads simultaneously.
It is widely used for precision machine tool spindles, testing instruments and high-speed precision automation rotary structures.
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- Model
- 71814ACD/DB
- Inner Diameter (ID)
- 70 mm
- Outer Diameter (OD)
- 90 mm
- Single Bearing Width
- 10 mm
- Set Width for DB pair
- 20 mm
- Contact Angle
- 25°
- Structure
- Two single bearings pre-ground matched, Back-to-Back DB arrangement, open type
- Material
- GCr15 chrome bearing steel
- Gear Type (if any)
- N/A
- Cage
- Polyamide or phenolic resin cage
- Clearance
- Standard CN clearance
- Precision Grade
- P0, P4 optional
- Approx Net Weight (pair)
- 0.27 kg
- Dynamic Load Cr
- 34200 N
- Static Load C0r
- 32000 N
- Limiting Speed(Grease)
- 4200 rpm
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- Back-to-back DB duplex arrangement provides strong anti-moment capacity and overall rigidity
- 25° ACD contact angle balances high speed performance and axial load carrying capacity
- Ultra-thin 718 series dimension greatly reduces radial space occupation for compact spindles
- Factory pre-matched paired set avoids manual pairing error and ensures consistent preload
- Separable structure enables convenient assembly and maintenance for precision rotary shafts
- Custom design available (P4 precision grade, hybrid ceramic version, OEM laser marking)
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This bearing is widely used in:
- Precision machine tool spindles, grinding equipment and high-frequency small motor assemblies
- Measuring instruments, optical equipment and automated precision rotary platforms
- Textile high-speed spindles, packaging precision machinery and robotics joint components
- General high-rigidity rotary equipment requiring compact radial installation dimension
???? Ideal for customers looking for reliable and long-life bearing solutions
- 25+ years experience in industrial bearing manufacturing
- Exported to 50+ countries worldwide
- Rich experience in OEM precision duplex matched angular contact bearing custom projects
- Strict pairing precision, noise and rotation accuracy inspection before shipment
- Fast response within 24 hours
- Stable supply for long-term cooperation
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- Raw material hardness inspection
- Precision grinding & superfinishing raceway machining
- Heat treatment metallurgy control
- Duplex matching tolerance, rotation runout and noise testing
- Final dimensional & appearance inspection before delivery
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Looking for a reliable bearing supplier?
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- Fast quotation within 24 hours
- Technical support from engineers
- Custom duplex matched bearing solution suggestions
- Competitive factory price
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