NSK Bearing

Basic Technical Specifications of NSK Bearings

• Dimensions: d 3–400 mm, D 7–600 mm, B/T 3–160 mm (ISO & JIS standards)

• Materials: SUJ2 steel, SUS440C stainless steel; seals made of NBR/HNBR/Fluorocarbon; steel or stainless steel shields

• Shield / Seal Types: Z / ZZ, DU / DDU, VV, Open

• Precision Classes: P0, P6, P5–P2 (suitable for CNC machines and spindle systems)

• Load Capacity: Radial load Cr 1.5–250 kN; axial load Ca 0.5–150 kN; service life L10h 5,000–20,000 hours

• Speed Limits:

  • 6000–6900 series: 8,000–32,000 rpm

  • Tapered roller bearings: 3,500–8,000 rpm

  • Cylindrical roller bearings: 4,000–12,000 rpm

  • Angular contact bearings: 10,000–30,000 rpm

• Internal Clearance: C0, C3, C4

• Fit Tolerance: Inner ring g6/h6/j5/k5; outer ring H7/J7/K7

• Lubrication: NSK greases LGU, LG2, NS7; spindle oils

• Quality Standards: ISO 9001, ISO 14001, JIS B 1518; noise/vibration control grades V1–V4