• SKF 628 & 638 Series Deep Groove Ball Bearings
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SKF 628 & 638 Series Deep Groove Ball Bearings

SKF 628 & 638 Series Deep Groove Ball Bearings

SKF single row deep groove ball bearings in the miniature 628 and 638 series (2Z, 2RS1, Z). Simple, robust, non-separable bearings for radial and axial loads at high speeds.

Key features

  • Single row, non-separable design with deep uninterrupted raceway grooves
  • Carries radial loads and axial loads in both directions, suitable for high speeds
  • Boundary dimensions to ISO 15:1998
  • Open bearings plus shielded (Z, 2Z, RZ, 2RZ) and sealed (RSL, RSH, RS1 and 2-side) variants where listed
  • Sealed and shielded bearings are greased for life; SKF Explorer sizes marked in the catalogue

Specifications

Bearing type Single row deep groove ball bearing
Design Non-separable
Dimension standard ISO 15:1998
Load direction Radial and axial (both directions)
Series 628 & 638
Seal / shield suffixes Z, 2Z, RZ, 2RZ, RSL, 2RSL, RSH, 2RSH, RS1, 2RS1
Units mm, kN, r/min
Brand SKF
Source SKF General Catalogue 6000, p. 324-327
628/4-2Z d: 4 mm | D: 9 mm | B: 3.5 mm | C: 0.54 kN | C0: 0.18 kN | Limiting speed: 70000 r/min
638/4-2Z d: 4 mm | D: 9 mm | B: 4 mm | C: 0.54 kN | C0: 0.18 kN | Limiting speed: 70000 r/min
628/5-2Z d: 5 mm | D: 11 mm | B: 4 mm | C: 0.64 kN | C0: 0.26 kN | Limiting speed: 60000 r/min
638/5-2Z d: 5 mm | D: 11 mm | B: 5 mm | C: 0.64 kN | C0: 0.26 kN | Limiting speed: 60000 r/min
628/6-2Z d: 6 mm | D: 13 mm | B: 5 mm | C: 0.88 kN | C0: 0.35 kN | Limiting speed: 53000 r/min
628/7-2Z d: 7 mm | D: 14 mm | B: 5 mm | C: 0.956 kN | C0: 0.4 kN | Limiting speed: 50000 r/min
628/8-2Z d: 8 mm | D: 16 mm | B: 5 mm | C: 1.33 kN | C0: 0.57 kN | Limiting speed: 45000 r/min
628/8-2RS1 d: 8 mm | D: 16 mm | B: 5 mm | C: 1.33 kN | C0: 0.57 kN | Limiting speed: 26000 r/min
638/8-2Z d: 8 mm | D: 16 mm | B: 6 mm | C: 1.33 kN | C0: 0.57 kN | Limiting speed: 45000 r/min
628/9-2Z d: 9 mm | D: 17 mm | B: 5 mm | C: 1.43 kN | C0: 0.64 kN | Limiting speed: 43000 r/min
628/9-Z d: 9 mm | D: 17 mm | B: 5 mm | C: 1.43 kN | C0: 0.64 kN | Limiting speed: 43000 r/min
628/9-2RS1 d: 9 mm | D: 17 mm | B: 5 mm | C: 1.43 kN | C0: 0.64 kN | Limiting speed: 24000 r/min
Deep Groove Ball BearingsSKF
12 product codes available in this family
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SKF 628 & 638 Series Deep Groove Ball Bearings

Brand SKF·Deep Groove Ball Bearings

Available part numbers (12)

628/4-2Z, 638/4-2Z, 628/5-2Z, 638/5-2Z, 628/6-2Z, 628/7-2Z, 628/8-2Z, 628/8-2RS1, 638/8-2Z, 628/9-2Z + 2 more — see full table ↓

How to order

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Product codes & specifications
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Product codeSpec
628/4-2Zd: 4 mm | D: 9 mm | B: 3.5 mm | C: 0.54 kN | C0: 0.18 kN | Limiting speed: 70000 r/min
638/4-2Zd: 4 mm | D: 9 mm | B: 4 mm | C: 0.54 kN | C0: 0.18 kN | Limiting speed: 70000 r/min
628/5-2Zd: 5 mm | D: 11 mm | B: 4 mm | C: 0.64 kN | C0: 0.26 kN | Limiting speed: 60000 r/min
638/5-2Zd: 5 mm | D: 11 mm | B: 5 mm | C: 0.64 kN | C0: 0.26 kN | Limiting speed: 60000 r/min
628/6-2Zd: 6 mm | D: 13 mm | B: 5 mm | C: 0.88 kN | C0: 0.35 kN | Limiting speed: 53000 r/min
628/7-2Zd: 7 mm | D: 14 mm | B: 5 mm | C: 0.956 kN | C0: 0.4 kN | Limiting speed: 50000 r/min
628/8-2Zd: 8 mm | D: 16 mm | B: 5 mm | C: 1.33 kN | C0: 0.57 kN | Limiting speed: 45000 r/min
628/8-2RS1d: 8 mm | D: 16 mm | B: 5 mm | C: 1.33 kN | C0: 0.57 kN | Limiting speed: 26000 r/min
638/8-2Zd: 8 mm | D: 16 mm | B: 6 mm | C: 1.33 kN | C0: 0.57 kN | Limiting speed: 45000 r/min
628/9-2Zd: 9 mm | D: 17 mm | B: 5 mm | C: 1.43 kN | C0: 0.64 kN | Limiting speed: 43000 r/min
628/9-Zd: 9 mm | D: 17 mm | B: 5 mm | C: 1.43 kN | C0: 0.64 kN | Limiting speed: 43000 r/min
628/9-2RS1d: 9 mm | D: 17 mm | B: 5 mm | C: 1.43 kN | C0: 0.64 kN | Limiting speed: 24000 r/min

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