GQZ 7205CD/HC Hybrid Ceramic Angular Contact Ball Bearing 25×52×15mm Silicon Nitride Ball High‑Speed Precision Bearing
The 7205CD/HC hybrid ceramic angular contact ball bearing adopts steel rings and silicon nitride ceramic rolling balls, featuring 15‑degree CD contact angle open‑type structure. Ceramic balls feature low density, low friction and excellent heat‑dissipation performance, effectively reducing bearing heat generation under high‑speed running conditions.
It is widely used in high‑speed machine tool spindles, high‑frequency motors and precision automation rotary platforms.
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- Model
- 7205CD/HC
- Inner Diameter (ID)
- 25 mm
- Outer Diameter (OD)
- 52 mm
- Width
- 15 mm
- Contact Angle
- 15°
- Structure
- Open type angular contact ball bearing, hybrid ceramic Si₃N₄ balls, steel inner & outer rings
- Material
- GCr15 steel raceway, silicon nitride ceramic balls
- Cage
- Polyamide resin cage
- ClearanceStandard CN clearance
- Precision Grade
- P0, P4 optional
- Approx Net Weight
- 0.14 kg
- Dynamic Load Cr
- 14800 N
- Static Load C0r
- 9420 N
- Limiting Speed(Grease)
- 14200 rpm
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- Light‑weight silicon nitride ceramic balls greatly reduce centrifugal force for superior high‑speed performance
- Lower friction coefficient reduces heat generation and improves high‑speed operating stability
- 15° CD contact angle balances radial load capacity and high‑speed rotation performance
- Ceramic rolling elements possess good wear resistance and anti‑seizure capability
- Open‑type structure supports different sealing and duplex pairing configurations
- Custom design available (P4 precision grade, DB/DF duplex matched set, OEM laser marking)
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This bearing is widely used in:
- High‑speed machine tool spindles, grinding spindles and high‑frequency motor assemblies
- Precision measuring instruments and automated precision rotary platform components
- High‑speed textile spindles, robotics joint parts and medical processing equipment
- Various high‑speed rotary equipment requiring low heat generation and long service life
???? 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 hybrid ceramic angular contact bearing custom projects
- Strict ceramic ball screening, run‑out and high‑speed simulation 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
- Ceramic ball appearance screening, 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 hybrid ceramic bearing matching solution suggestions
- Competitive factory price
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Yes, back‑to‑back DB and face‑to‑face DF pre‑matched sets are available.
Standard hybrid ceramic bearings: 10‑18 days
Custom high‑precision specifiion products: depending on specifiions
Yes, we provide stable supply for long‑term cooperation.
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