The SKF 6004-2Z/C3 is a single row deep groove ball bearing with a 20 mm bore, 42 mm outside diameter and 12 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 9.95 kN and a basic static load rating of 5 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; 04 = bore code for 20 mm (04 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 19,000 r/min for this version, compared with 11,000 r/min for the sealed 6004-2RSH/C3. That makes the 2Z design the usual choice for electric motors, fans and other clean, fast-running positions.
Technical data
| SKF designation | 6004-2Z/C3 |
|---|---|
| Bearing type | Single row deep groove ball bearing |
| Dimension series | 60 – ISO dimension series 10 (extra-light) |
| Bore diameter (d) | 20 mm |
| Outside diameter (D) | 42 mm |
| Width (B) | 12 mm |
| Basic dynamic load rating (C) | 9.95 kN |
| Basic static load rating (C0) | 5 kN |
| Reference speed | 38,000 r/min |
| Limiting speed | 19,000 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 | 0.0684 kg |
| Condition | New, original SKF |
Typical applications
- General machinery shafts and housings
- Centrifugal pumps and pump motors
- Machine-tool and woodworking spindles running at moderate speed
- Fans, blowers and ventilation units
- Like-for-like replacement of a worn SKF 6004-2Z/C3
Compatibility and replacement
Every 6004 bearing made to ISO 15 has the same 20 x 42 x 12 mm boundary dimensions, so this bearing fits wherever a 6004 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 6004-2RSH/C3 is the same size.
Frequently asked questions
What is the difference between 6004-2Z/C3 and 6004-2RSH/C3?
Only the closures. The 6004-2Z has non-contact steel shields; the 2RSH version has contact rubber seals. Per SKF, the limiting speed is 19,000 r/min for 2Z and 11,000 r/min for 2RSH; the load ratings are the same. Choose shields for speed and low friction, seals for dirt and moisture.
Is it the same as a 6004ZZ or 6004-2RS from another brand?
Dimensionally yes: all 6004 bearings share 20 x 42 x 12 mm under ISO 15. A ZZ marking corresponds to this shielded design and 2RS to the sealed design; load ratings and speeds differ between makers, and the figures on this page are the SKF values.
Which shaft and housing does it fit?
A 20 mm shaft seat and a 42 mm housing bore, with 12 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 6004-2RSH/C3 (sealed version)
- SKF 6003-2Z/C3 (17 mm bore)
- SKF 6005-2Z/C3 (25 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.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the part number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
