TIMKEN 2MM211WIDUL SUPER PRECISION BEARINGS

Description:

The Timken 2MM211WICRDUL (Manufacturing Part Number: 2MM211WI DUL, World Part Number: 7211C-T-P4S-DUL) is a matched duplex set of super precision single-row angular contact ball bearings from the Timken Fafnir® 200WI series. Factory matched with DUL (light preload), this bearing set is designed for high-speed machine tool spindles requiring exceptional rigidity, low runout, and precise shaft positioning. It is commonly used in CNC machining centers, milling machines, grinding machines, jig borers, precision lathes, and other high-accuracy manufacturing equipment.

Applications:

The Timken 2MM211WICRDUL bearing set is engineered for high-speed spindle applications where accuracy, rigidity, and thermal stability are critical. Its duplex light preload arrangement improves spindle stiffness, minimizes vibration, and delivers excellent rotational accuracy, making it ideal for CNC machining centers, high-speed milling machines, grinding machines, machining spindles, routers, and other industrial machine tools requiring super precision bearings.

Technical Specifications:

• Manufacturer Part Number (MPN): 2MM211WICRDUL (Manufacturing Part Number: 2MM211WI DUL)
• World Part Number: 7211C-T-P4S-DUL
• Manufacturer: Timken Fafnir
• Product Type: Super precision angular contact ball bearing set
• Bearing Type: Duplex matched single-row angular contact ball bearings
• Series: 200WI (ISO 7211C)
• Bore Diameter (ID): 55 mm
• Outside Diameter (OD): 100 mm (3.937 in)
• Bearing Width (Single): 21 mm (0.827 in)
• Total Width (Duplex Set): 42 mm (1.654 in)
• Contact Angle: 15°
• Arrangement: Duplex matched pair
• Preload: DUL (Light preload)
• Ball Material: Steel
• Cage Type: CR outer land riding cage
• Cage Material: MBR phenolic cage
• Precision Rating: ISO P4S (ABEC 7/9 equivalent)
• Static Radial Load Rating (C0): 40,000 N (9,000 lbf) per bearing
• Dynamic Radial Load Rating (Ce): 58,700 N (13,200 lbf) per bearing
• ISO Dynamic Radial Load Rating (C1): 53,400 N (12,000 lbf) per bearing
• Limiting Speed (Grease): 14,500 rpm
• Limiting Speed (Oil): 29,000 rpm
• Maximum Shaft Fillet Radius: 1.5 mm (0.059 in)
• Maximum Housing Fillet Radius: 1.5 mm (0.059 in)
• Function: Supports combined radial and axial loads in high-speed precision spindle applications.
• Features: Factory-matched duplex set, light preload, super precision construction, low runout, high rigidity, optimized for machine tool spindles, and excellent thermal stability.

Common Replacements:

• Timken 2MM211WICRDUL super precision bearing set
• SKF 7211 CD/P4A duplex bearing set
• NSK 7211CTYNSULP4 duplex bearing set