NHBB SSRI-6632ZZ High-Precision Miniature Radial Ball Bearing
This is an ultra-high-precision, instrument-grade miniature radial ball bearing manufactured by New Hampshire Ball Bearings (NHBB). Fabricated from premium stainless steel, it is engineered for exceptional reliability, low torque, and smooth operation under demanding mechanical constraints. It features double metal shields for contamination exclusion and a specialized synthetic lubricant optimized for high-performance instruments.
Physical Dimensions
- Bore Diameter (d): 0.1875 in (3/16" / 4.7625 mm)
- Outer Diameter (D): 0.3750 in (3/8" / 9.5250 mm)
- Width (B): 0.1250 in (1/8" / 3.175 mm)
Material & Construction
- Ring & Ball Material: AISI 440C Stainless Steel (offers superior corrosion resistance and high rockwell hardness)
- Enclosure Type: Double Shielded (Metal "ZZ" non-contact shields to retain lubricant and block dust without increasing torque)
- Retainer Type: Ribbon Cage (Two-piece stamped stainless steel retainer for low frictional drag)
Performance Classifications
- Precision Rating: ABEC-7 / ISO P4 (Ultra-precision tolerances for minimum runout and high rotational accuracy)
- Radial Internal Clearance: P25 (Tight, tightly controlled radial play for precise alignment)
- Lubrication Code: LY669 (Factory-filled with a specialized, stable synthetic lubricant engineered for extended service life and consistent viscosity across temperature variances)
Primary Applications
Due to its strict ABEC-7 tolerance and stainless construction, this component is ideally suited for:
- Medical devices and dental handpieces
- Aerospace, aviation instruments, and gyroscopes
- High-end optical encoders and robotics
- Precision testing equipment and calibration instruments