S7204CD/HC Angular Contact Ball Bearing 20×47×14mm 15° Contact Angle for CNC Machine Spindle

Product Overview
- S7204CD/HC is single row hybrid ceramic angular contact ball bearing with 15° contact angle. It uses GCr15 steel raceways paired with silicon nitride ceramic balls. This bearing supports combined radial and one-direction axial loads. Ceramic rolling elements reduce centrifugal force at high speed, lower heat buildup and prevent electric corrosion, well suited for high-precision high-speed rotary systems.
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Key Specifications
| Parameter |
Specification |
| Model |
S7204CD/HC |
| Bearing Type |
Hybrid Ceramic Angular Contact Ball Bearing |
| Inner Diameter d |
20 mm |
| Outer Diameter D |
47 mm |
| Width B |
14 mm |
| Basic Dimensions |
204714mm |
| Contact Angle |
15° |
| Seal Type |
Open Type |
| Cage |
Polyamide Cage |
| Rings Material |
GCr15 Chrome Bearing Steel |
| Rolling Element |
Si3N4 Silicon Nitride Ceramic Balls |
| Basic Dynamic Load Cr |
11.9 kN |
| Basic Static Load C0r |
5.85 kN |
| Limiting Speed(Grease) |
43000 rpm |
| Precision Rating |
P0 |
| Weight |
0.092 kg |
Main Features
- 15° contact angle bears combined radial and single-direction axial load
- Lightweight Si3N4 ceramic balls cut centrifugal force for ultra-high speed operation
- Non-conductive ceramic balls isolate current to avoid electric corrosion
- Low friction reduces heat generation in continuous high-speed running
- High rigidity and stable rotation precision for precision machinery
- Open design allows oil lubrication for extreme high-speed working conditions
Typical Applications
- CNC machine tool spindles
- High speed high-frequency motors
- Precision grinding equipment
- High-speed textile spindles
- Aerospace auxiliary rotary parts
- High-speed automation rotary units
*Ready stock. Short lead time. Fast delivery. Send us your bearing list and let’s get started!
Why Choose GQZ Bearing
- 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






FAQ
Q: What is S7204CD/HC bearing?
A: It is hybrid ceramic angular contact ball bearing, steel rings with silicon nitride ceramic balls, 15° contact angle.
Q: What does HC suffix mean?
A: HC stands for hybrid ceramic, rolling balls are silicon nitride ceramic.
Q: Can this bearing resist electric corrosion?
A: Yes, ceramic balls are non-conductive to cut off current and prevent electric pitting damage.
Q: What is the dimension of S7204CD/HC?
A: Standard size 20×47×14mm.
Q: Does it take both radial and axial load?
A: Yes, it can carry radial load plus unidirectional axial load.
*Need custom bearings? Share your drawings, specifications or requirements — we’ll find the right solution for you.