627-ZZ Deep Groove Ball Bearing Technical Documentation
1. Product Overview
- Model: 627-ZZ
- Type: Double Shielded Deep Groove Ball Bearing
- Precision Grade: Standard (P0)
2. Detailed Parameters
| Model |
d (mm) |
D (mm) |
B (mm) |
Cr (kN) |
Cor (kN) |
Speed (rpm) |
| 623-ZZ |
3 |
10 |
4 |
0.65 |
0.23 |
48,000 |
| 624-ZZ |
4 |
13 |
5 |
1.3 |
0.485 |
44,000 |
| 625-ZZ |
5 |
16 |
5 |
1.8 |
0.68 |
38,000 |
| 626-ZZ |
6 |
19 |
6 |
2.3 |
0.92 |
32,000 |
| 627-ZZ |
7 |
22 |
7 |
3.1 |
1.4 |
28,000 |
| 628-ZZ |
8 |
24 |
8 |
3.9 |
1.8 |
24,000 |
| 629-ZZ |
9 |
26 |
8 |
4.7 |
2.3 |
20,000 |
3. Performance Characteristics
- Type: Deep groove ball bearing with double metal shields (ZZ)
- Dimensions (mm): Inner diameter (d) = 7, Outer diameter (D) = 22, Width (B) = 7
- Dynamic Load Rating (Cr): 3,300 N (335 kgf)
- Static Load Rating (Cor): 1,370 N (140 kgf)
- Speed Limits:
- Grease lubrication: 30,000 rpm (open), 28,000 rpm (sealed)
- Oil lubrication: 36,000 rpm (open)
- Weight: 12.7–12.9 g (varies by seal type)
- Tolerance: Accommodates shaft misalignment of 8'–16'
-
Application Scenarios
- Typical Uses: Electric mixers, air purifiers, medical devices, food processing equipment, and precision instruments.
- Advantages: Low friction, high-speed capability, and suitability for radial/light axial loads.
- 4. Mechanical Performance
- Load Capacity: Primarily for radial loads, with limited axial load support
- Sealing: Double metal shields (ZZ) protect against contaminants, extending service life
- Material: High-carbon chromium steel (standard), with options for stainless steel or ceramic hybrids
.
5. Applications
- Industrial Machinery:
- Foundry equipment , industrial furnaces , heat treatment lines
- Pulverizers , spinning machines , industrial dryers
- Precision Instruments & Motors:
- High-speed pumps , miniature motors , small motors
- Suitable for space-constrained, high-speed rotating devices
- Other Equipment:
- Textile machinery , packaging printers , agricultural machinery

6. Key Advantages
- High-Speed Performance: Optimized for stable operation at ultra-high RPMs
- Durability: Dust shields extend lifespan in harsh environments
- Versatility: Handles combined radial/axial loads