HCB71911-C-T-P4S-UL Precision Spindle Bearing_Ball Bearing,Roller Bearing,Pillow Block Bearing

HCB71911-C-T-P4S-UL Precision Spindle Bearing

Brand	=	SEMRI
Manufacturer Part Number	=	HCB71911-C-T-P4S-UL
Inside Diameter	=	55mm
Outside Diameter	=	80mm
Width	=	13mm
Contact Angle	=	15°
Precision Grade	=	P4S
Seals or Shields	=	None
Material	=	Hybrid Ceramic
Clearance	=	CN = Standard Internal clearance
Cage Type	=	T = Outerring Guided Phenolic Cage

Target Industrial Applications
1. CNC Machine Tools and Precision Machinery Spindles (Primary Application)
This is the most critical application scenario for this bearing. High-precision machine tools require minimal spindle vibration and low temperature rise during cutting operations.
High-Speed Motorized Spindles: Due to the use of silicon nitride ceramic balls, which are lightweight and generate minimal centrifugal force, these bearings are ideal for supporting high-speed motorized spindles in modern CNC machining centers, engraving/milling machines, and high-speed milling machines.
High-Precision Grinding Machine Spindles: Grinding processes demand extremely low surface roughness. The P4S rotational precision of this bearing ensures ultra-low runout for surface, internal, and cylindrical grinding spindles at high speeds, effectively eliminating machining chatter marks (vibration ripples).
CNC Lathes and Turn-Mill Combi-Centers: Used in precision turning spindles for manufacturing high-precision components, non-ferrous metals, and hard alloys.

2. Precision Semiconductor and Electronics Manufacturing Equipment
The semiconductor industry imposes rigorous standards on operating speed, precision, and cleanliness.
Wafer Dicing/Slicing Machine Spindles: Dicing spindles operate at ultra-high rotational speeds. This bearing ensures that the cutting blades maintain micron-level positioning accuracy without drifting.
High-Speed PCB Drilling and Milling Machines: Used for high-speed micro-hole drilling in printed circuit boards, where the bearings must withstand ultra-high frequency start-stop cycles and high-speed operations.

3. High-Speed Drivetrains and Precision Power Systems
Turbochargers and Micro Gas Turbines: Selected experimental-grade or highly demanding micro-turbine systems utilize hybrid ceramic bearings to withstand ultra-high speeds and high-temperature environments.
High-Speed Centrifuges: Applied in the main spindle drive units of laboratory medical centrifuges and industrial separation centrifuges, leveraging their low friction and high-speed capabilities.

4. Precision Testing and Metrology Instrumentation
Dynamometers and High-Speed Test Benches: Serving as the core support bearings in automotive component and electric motor high-speed testing rigs, they prevent frictional heat and vibration from distorting test data accuracy.
Precision Positioning Rotary Tables: Used in the high-precision rotary axes of advanced coordinate measuring machines (CMMs) or optical inspection equipment.

Note: Since this model features a UL (Universal matching with Light preload) design, design engineers typically configure 2 to 4 of these bearings in a combined arrangement (such as Back-to-Back "DB" or Tandem "DT" arrangements) in practical applications. This flexibility satisfies the specific requirements for spindle rigidity and axial load capacity across different operating environments.

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