The SKF 6008-2Z/C3 is a single row deep groove ball bearing with a 40 mm bore, 68 mm outside diameter and 15 mm width, fitted with a non-contact metal shield on both sides (2Z) and C3 radial internal clearance. It belongs to the SKF Explorer performance class and, per SKF, carries a basic dynamic load rating of 17.8 kN and a basic static load rating of 11 kN.
The designation can be read directly: 6 = single row deep groove ball bearing, 0 = ISO dimension series 10 (extra-light), the thinnest cross-section of the three common series, used where radial space is limited; 08 = bore code for 40 mm (08 x 5); 2Z = shields on both sides; C3 = radial internal clearance greater than normal.
Shields leave a narrow gap to the inner ring, so friction stays low and SKF lists a limiting speed of 11,000 r/min for this version, compared with 6,300 r/min for the sealed 6008-2RS1/C3. That makes the 2Z design the usual choice for electric motors, fans and other clean, fast-running positions.
Technical data
| SKF designation | 6008-2Z/C3 |
|---|---|
| Bearing type | Single row deep groove ball bearing |
| Dimension series | 60 – ISO dimension series 10 (extra-light) |
| Bore diameter (d) | 40 mm |
| Outside diameter (D) | 68 mm |
| Width (B) | 15 mm |
| Basic dynamic load rating (C) | 17.8 kN |
| Basic static load rating (C0) | 11 kN |
| Reference speed | 22,000 r/min |
| Limiting speed | 11,000 r/min |
| SKF performance class | SKF Explorer |
| Sealing | Shield on both sides (non-contact) |
| Radial internal clearance | C3 (greater than normal) |
| Cage | Sheet metal (pressed steel) |
| Bore type | Cylindrical |
| Lubricant | Grease, no relubrication feature |
| Material | Bearing steel |
| Net weight | 0.194 kg |
| Condition | New, original SKF |
Typical applications
- General machinery shafts and housings
- Machine-tool and woodworking spindles running at moderate speed
- Electric motors and generators (drive-end and non-drive-end positions)
- Gearbox input shafts and speed reducers
- Like-for-like replacement of a worn SKF 6008-2Z/C3
Compatibility and replacement
Every 6008 bearing made to ISO 15 has the same 40 x 68 x 15 mm boundary dimensions, so this bearing fits wherever a 6008 with shields and C3 clearance from another maker was used. Suffixes differ between brands: shields are often marked ZZ or 2Z, contact seals 2RS, 2RS1, DDU or LLU, and the clearance C3 may appear as “C3” or “/C3”. Always match the sealing arrangement and the clearance class shown on the old bearing; if your machine needs the other closure, the 6008-2RS1/C3 is the same size.
Frequently asked questions
What is the difference between 6008-2Z/C3 and 6008-2RS1/C3?
Only the closures. The 6008-2Z has non-contact steel shields; the 2RS1 version has contact rubber seals. Per SKF, the limiting speed is 11,000 r/min for 2Z and 6,300 r/min for 2RS1; the load ratings are the same. Choose shields for speed and low friction, seals for dirt and moisture.
What does C3 mean, and can I use a bearing without it?
C3 is a radial internal clearance greater than normal. It leaves room for the inner ring to expand with a tight shaft fit or with heat, which is why electric motors and hot-running machines often specify it. Fit the clearance class the machine maker specifies or that is marked on the old bearing; do not swap C3 for normal clearance without checking.
Which shaft and housing does it fit?
A 40 mm shaft seat and a 68 mm housing bore, with 15 mm of axial space. The exact fit tolerances depend on the load and on which ring rotates, so follow the machine drawing or the old bearing seat.
Related parts
- SKF 6008-2RS1/C3 (sealed version)
- SKF 6007-2Z/C3 (35 mm bore)
- SKF 6009-2Z/C3 (45 mm bore)
- All SKF 6000 Series Bearings
Part of the SKF 6000 series stocked by RendatSP for electric motors, gearboxes, pumps, fans, conveyors and general industrial machinery, with fast shipping to Iraq, Saudi Arabia, UAE, Egypt, Yemen, Libya and across the Middle East and Africa.
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