GQZ S7204CD/HC Hybrid Ceramic Single Row Angular Contact Ball Bearing 20×47×14mm 15° Contact Angle Open Type

S7204CD/HC is super precision single row angular contact ball bearing.

• S: Universal matchable design
• CD: 15° contact angle, high-capacity D internal geometry
• HC: Hybrid construction, steel inner & outer rings + silicon nitride ceramic rolling elements with electric insulation capability

Open structure supports circulating oil lubrication. It bears combined radial load and one-way axial load. Single bearing can be arranged back-to-back (DB), face-to-face (DF) or tandem (DT) to withstand bidirectional axial loads. Ceramic balls reduce centrifugal force at high rotation speed, restrain electric erosion and lower operating temperature. Widely adopted on high-speed CNC spindles, frequency conversion servo motors, ball screw supports and high-precision rotary equipment vulnerable to stray current damage.

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

Model

S7204CD/HC

Dimensions

d20 mm, D47 mm, B14 mm

Min chamfer r

1 mm

Net weight

approx 0.092 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 resin cage

Structure form

Open type without seals

Basic dynamic load Cr

11900 N

Basic static load C0r

5850 N

Limiting speed (oil lubrication)

48000 rpm

Additional Info

Complete dimension drawings and load data available on request.

1. HC hybrid ceramic rolling elements achieve insulation performance, effectively avoid bearing electric pitting corrosion
2. 15° CD high-capacity structure balances high-speed performance and load carrying capacity
3. S universal matchable design, flexible for various duplex paired installation modes on site
4. Low-density ceramic balls cut centrifugal load, realize higher limiting speed than all-steel bearings
5. Open design adapts continuous circulating oil lubrication for long-term high-speed precision operation
6. Customizable: P4/P5 precision grade, multiple preload classes, OEM laser marking, dedicated high-speed grease

• High-speed vertical & horizontal machining center main spindles
• Variable frequency servo motors and generator rotary shafts
• Precision ball screw fixed-end support assemblies
• High-speed grinding machinery and automation precision transmission units
• Rotary equipment exposed to stray electric current and electric corrosion risk

25 years professional bearing manufacturer, products exported globally.

Strict inspection on ceramic ball roundness and surface quality.

Ultra-precision raceway superfinishing to meet high precision requirements.

24-hour technical support for pairing layout and preload selection.

Ample stock for machinery distributors.

Precise dimensions and stable service performance.

GCr15 ring quenching & tempering hardness inspection

Silicon nitride ceramic ball dimension sorting and surface defect detection

Precision superfinishing for raceway surfaces

Contact angle, internal clearance and rotational vibration testing

If you need S7204CD/HC hybrid ceramic angular contact bearings:

Send inquiry to obtain below supports:

• Quick quotation within 24 hours
• DB/DF matched set solution consultation
• Optional precision grade and preload selection
• Competitive factory direct price
• Contact our sales team for full datasheets and formal offer.