GQZ 7205CD/HC Hybrid Ceramic Single Row Angular Contact Ball Bearing 25×52×15mm 15° Contact Angle Open Type

7205CD/HC follows SKF super precision bearing standard specification.

• CD: 15° contact angle, high capacity D-design internal structure, universal matchable for duplex assembly
• HC: Hybrid construction, GCr15 steel rings + silicon nitride ceramic rolling elements, electrical insulation performance

  Open type design allows convenient circulating oil lubrication. It bears combined radial load and one-way axial load. Single bearing can be combined as DB back-to-back, DF face-to-face or DT tandem sets to withstand bidirectional axial loads. Ceramic balls reduce centrifugal force at high speed, suppress electrical erosion and lower operating temperature. Widely adopted on high-speed CNC spindles, frequency conversion motors, ball screw supports and precision high-speed rotary equipment.

  Formal quotation will be sent within 24 hours upon your inquiry.

Model

7205CD/HC

Dimensions

d25 mm, D52 mm, B15 mm

Min chamfer r

1 mm

Net weight

approx 0.132 kg

Structure

Single row angular contact ball bearing

Contact angle

15°

Material

Inner/outer ring: GCr15 bearing steel; rolling element: Si₃N₄ ceramic balls; machined phenolic cage

Structure type

Open design, no seals

Basic dynamic load Cr

13500 N

Basic static load C0r

9700 N

Limiting speed (oil lubrication)

38000 rpm

Complete dimension drawings and load data available on request.

1. HC hybrid ceramic balls realize insulation effect, effectively eliminate electric pitting damage inside bearings
2. 15° CD large capacity structure balances high-speed capability and load carrying performance
3. Universal matchable design, flexible for DB/DF/DT paired installation on site
4. Lower density ceramic balls reduce centrifugal load, achieve higher limiting speed than all-steel bearings
5. Open structure supports continuous oil lubrication, suitable for long-time high-speed precision operation
6. Customizable: P4/P5 precision grade, different preload classes, OEM laser marking, special high-speed grease

• High-speed vertical & horizontal machining center main spindles
• Frequency conversion servo motors and generator rotary shafts
• Precision ball screw support bearing assemblies
• High-speed grinding equipment and automation precision transmission units
• Rotary machinery vulnerable to stray current and electrical corrosion

• 25 years professional bearing manufacturer, products exported globally.
• Strict inspection for ceramic ball roundness and surface quality.
• Precision superfinishing for super precision grade requirements.
• 24-hour technical support for pairing arrangement and preload selection.
• Ample stock for machinery distributors.
• Precise dimensions and stable service performance.

• GCr15 ring quenching & tempering hardness inspection
• Silicon nitride ceramic ball dimensional sorting and surface defect testing
• Precision superfinishing for raceway surfaces
• Contact angle, internal clearance and rotational vibration testing

If you need 7205CD/HC hybrid ceramic angular contact bearings:

Send inquiry to obtain below supports:

• Quick quotation within 24 hours
• DB/DF matched set scheme consultation
• Precision grade and preload optional solutions
• Competitive factory direct price

  Contact our sales team for full datasheets and formal offer.