Fafnir2MM219WICRDULSuper Precision Angular Contact Ball Bearing 95x170x32 mm 15 Degree ABEC 7/9 Light Preload Phenolic Cage

Product Description

What this part is

Fafnir 2MM219WI-SUL super precision single-row angular contact ball bearing. Bore: 95 mm (3.7402 in). Outside Diameter: 170 mm (6.6929 in). Overall Width: 32 mm (1.2598 in). ISO 7219 envelope, open on both faces, with a phenolic outer-land-riding cage.

Decoding the designation

Contact Angle: 15°. Precision Class: P4S (ABEC 7/9). Series: Fafnir 200WI, mapping to the ISO 72 medium dimension family at a 95 mm bore. Cage Material: Phenolic. Cage Type: Outer-land-riding. Arrangement: single, universally ground. Preload: Light. Searchable forms of the number: 2MM219WI-SUL, 2MM-219-WI-SUL, 2MM219WISUL, 2MM219WI-CR-SUL, and the carton cross 2MM 219 WI CR DUL.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness, while a 25° bearing in the same envelope carries more thrust and less speed. Light preload holds running torque and heat generation down, which suits higher spindle speeds. The phenolic cage is light and runs quietly at speed. A single row takes thrust in one direction.

Load ratings

Dynamic Load Rating: 146.0 kN (146,000 N / 33,500 lbf). Static Load Rating: 96.5 kN (96,500 N / 21,600 lbf). Item Weight: 5.6 lb (2.54 kg). Maximum shaft or housing fillet radius cleared by the bearing corner: 2.0 mm (0.079 in).

Materials and construction

Bearing Material: chrome bearing steel. Rolling Elements: steel balls, single row. Number of Rows: 1. Bore Type: Straight. Closure Type: Open both faces. Internal Clearance: N/A — the SUL execution is preload-set. Lubricant: grease or oil. Maximum Temperature: 120 °C. Minimum Temperature: –30 °C.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, universally ground, so it mounts alone or stacks back-to-back, face-to-face or in tandem, with preload established by the ground faces.

Interchange guidance

The ISO designation is 7219C-T-P4S at 15°. Closest at 15°: NSK 7219CTYNSULP4 (light preload) and SKF 7219 CDGA/P4A (extra light preload, so check the preload when pairing). A 3MM219WI shares the 95 x 170 x 32 mm envelope at a 25° contact angle and is a related size, as is any variant at medium or heavy preload.

Applications

Machine tool spindles, grinding spindles, precision gearboxes and high-speed rotating assemblies. Harmonization Code: 8482.10.50. Country of Origin: United States.