The SKF 6211-2Z/C3 is a single row deep groove ball bearing with a 55 mm bore, 100 mm outside diameter and 21 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 46.2 kN and a basic static load rating of 29 kN.
The designation can be read directly: 6 = single row deep groove ball bearing, 2 = ISO dimension series 02 (light), the most widely used series, balancing size and load capacity; 11 = bore code for 55 mm (11 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 7,000 r/min for this version. That makes the 2Z design the usual choice for electric motors, fans and other clean, fast-running positions.
Technical data
| SKF designation | 6211-2Z/C3 |
|---|---|
| Bearing type | Single row deep groove ball bearing |
| Dimension series | 62 – ISO dimension series 02 (light) |
| Bore diameter (d) | 55 mm |
| Outside diameter (D) | 100 mm |
| Width (B) | 21 mm |
| Basic dynamic load rating (C) | 46.2 kN |
| Basic static load rating (C0) | 29 kN |
| Reference speed | 14,000 r/min |
| Limiting speed | 7,000 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 | 0.618 kg |
| Condition | New, original SKF |
Typical applications
- General machinery shafts and housings
- Compressors and vacuum pumps
- Gearbox input shafts and speed reducers
- Fans, blowers and ventilation units
- Like-for-like replacement of a worn SKF 6211-2Z/C3
Compatibility and replacement
Every 6211 bearing made to ISO 15 has the same 55 x 100 x 21 mm boundary dimensions, so this bearing fits wherever a 6211 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 6211-2RS1/C3 is the same size.
Frequently asked questions
What is the difference between 6211-2Z/C3 and 6211-2RS1/C3?
Only the closures. The 6211-2Z has non-contact steel shields; the 2RS1 version has contact rubber seals. Choose shields for speed and low friction, seals for dirt and moisture.
Which shaft and housing does it fit?
A 55 mm shaft seat and a 100 mm housing bore, with 21 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.
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.
Related parts
- SKF 6211-2RS1/C3 (sealed version)
- SKF 6210-2Z/C3 (50 mm bore)
- SKF 6212-2Z/C3 (60 mm bore)
- All SKF 6200 Series Bearings
Part of the SKF 6200 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.
