SEMRI B7205-E-2RSD-T-P4S-DUL_Ball Bearing,Roller Bearing,Pillow Block Bearing

B7205-E-2RSD-T-P4S-DUL Spindle Bearing
SEMRI B7205-E-2RSD-T-P4S-DUL Spindle Bearing

Brand	=	SEMRI
Manufacturer Part Number	=	B7205-E-2RSD-T-P4S-DUL
Inside Diameter（d）	=	25mm
Outside Diameter（D）	=	52mm
Width（B）	=	15mm
Combined Width (2B)	=	30mm
Contact Angle (a)	=	25°
Precision Grade	=	P4S
Seals or Shields	=	Non Contact Seals
Clearance	=	CN = Standard Internal clearance
Cage Type	=	T = Outerring Guided Phenolic Cage

Key application areas include the following core sectors:
1. High-speed CNC machine tools and motorized spindles for high-speed machining centers: The 25° contact angle (E) is ideal for high-speed cutting spindles, commonly used in the high-speed milling of light alloys and aluminum parts. Woodworking routers and CNC engraving/milling machines: Used at the front or rear of the spindle to handle high-speed engraving of wood, plastics, and soft metals. Precision internal grinding machine wheelheads: Serve as spindle supports for small grinders, providing extremely high rotational accuracy while maintaining high speeds.
2. Automation and precision transmission systems: CNC machine tool ball screw supports—while dedicated screw bearings are often used, this type of universal combination bearing is also employed in pairs at the ends of compact, high-speed, light-load screws. Precision direct-drive motors (DD motors) and servo axes: Used in industrial automation joints requiring high dynamic response and the elimination of axial play.
3. Semiconductor and electronic manufacturing equipment: Micro-hole PCB drilling machines—circuit board drilling requires extremely high speeds (often tens of thousands of RPM), and 25° angular contact bearings are core components of these motorized spindles. High-speed chip mounters: Used in the high-speed rotation and positioning mechanisms of placement heads; the 2RSD seal design effectively prevents splashed rosin or dust from entering the bearing.
4. Turbines and fluid machinery: Small turbochargers and blowers—serve as rotor supports in small, high-speed gas compressors and turbopumps used in experimental or specialized industrial applications.

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