Timken (Fafnir) 2MM210WI DUM Duplex Super Precision Angular Contact Ball Bearing, Metric Series, 50mm Bore, 90mm OD, 40mm Width, Open, Cylindrical Bore, Phenolic Cage, 15° Contact Angle, ABEC Class 7/9 Tolerance.
- Regular price
- $1,100.00
- Sale price
- $1,100.00
- Regular price
-
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Key Features
- ABEC 9/ISO P2 axial running tolerances for higher accuracy
- Non-critical features manufactured to ABEC 7/ISO P4 tolerances for cost effectiveness
- 15 degree initial contact angle for high degree of rigidity in both axial and radial directions and low operating temperatures
- Clean steel supports longer service life
Description
Timken® Duplex Super Precision Angular Contact Ball Bearings
Timken® Duplex Super Precision Angular Contact Ball Bearings are engineered for high-speed, high-accuracy applications where precision and rigidity are critical. Manufactured from premium bearing-grade steel and built to ABEC 7/9 (ISO P4/P2) tolerances, these bearings deliver exceptional rotational accuracy, smooth operation, and long-term performance under demanding operating conditions.
The angular contact design allows each bearing to support combined radial and axial loads, with the duplex (paired) configuration providing increased rigidity and load-carrying capacity. Timken’s precision manufacturing ensures optimized raceway geometry, consistent preload control, and minimal vibration — ideal for CNC spindles, machine tools, precision pumps, and robotics.
Available in a variety of contact angles, cage materials, and preload options, Timken Super Precision Bearings are designed to meet the highest standards of speed, stability, and reliability.
Specifications
Key Dimensions
| Rolling Element | Ball |
| Bore Size (ID) | 1.9685 in / 50.000 mm |
| Outer Diameter | 3.5433 in / 90.000 mm |
| Overall Width | 1.5748 in / 40.000 mm |
Performance
| Precision Class | ABEC Class 7/9 |
| Preload | Medium |
| Contact Angle | 15° |
| Maximum Capacity / Filling Slot | No |
| Relubricatable | No |
| Lubricant | Oil |
| Relubrication Feature | None |
Properties
| Bearing Type | Unmounted Ball Bearing |
| Outer Diameter Type | Cylindrical |
| Bore Type | Cylindrical |
| Row Type | 2 |
| Cage Material | Phenolic |
| Bearing Material | Steel |
| Material - Rolling Elements | Steel |
| Cage Type | Machined Window |
| Inner Ring Width | 0.7874 in / 20.000 mm |
| Outer Ring Width | 0.7874 in / 20.000 mm |
| Number of Bearings | Duplex |
| Flush Ground | Yes |
| Component | Assembly |
| Closure (Seal) Type | Open |
| Ring Type | One Piece Inner and One Piece Outer |
Mounting Dimensions
| Maximum Housing Fillet Radius | 0.043 in / 1.09 mm |
| Maximum Shaft Fillet Radius | 0.043 in / 1.09 mm |