SKF single-row deep groove ball bearing complete reference across the four ISO 15 metric series: 6000 (extra light), 6200 (light), 6300 (medium), 6400 (heavy). Bore d, outside diameter D, width B, dynamic C and static C₀ load ratings, limiting speed (grease and oil), suffix decoder (2RS/2RSH/2Z/2RSL/2NR/2RS1/N/NR/M/MA/C3/C4), cross-maker interchange to FAG, NSK, NTN, Timken, Koyo. Applications: electric motors, gearboxes, machine tools, fans, pumps, agricultural machinery, marine deck-machinery.
The SKF single-row deep groove ball bearing is the workhorse rolling element of industry — installed on more motors, gearboxes, machine tools, fans, pumps and general rotating machinery than any other bearing type combined. SKF publishes four metric series to ISO 15: 6000 (extra light), 6200 (light), 6300 (medium) and 6400 (heavy). All four share the same 5-mm-bore steps and interchange dimensionally between all major bearing makers. What differs by series is the section (light vs heavy) and thus the load rating at any given bore.
| Designation | Bore d (mm) | OD D (mm) | Width B (mm) | Dynamic C (kN) | Static C₀ (kN) | Limiting speed (rpm, grease) |
|---|---|---|---|---|---|---|
| 6000 | 10 | 26 | 8 | 4.75 | 1.96 | 34,000 |
| 6001 | 12 | 28 | 8 | 5.40 | 2.36 | 32,000 |
| 6002 | 15 | 32 | 9 | 5.85 | 2.85 | 28,000 |
| 6003 | 17 | 35 | 10 | 6.05 | 3.25 | 26,000 |
| 6004 | 20 | 42 | 12 | 9.36 | 5.00 | 22,000 |
| 6005 | 25 | 47 | 12 | 11.9 | 6.55 | 20,000 |
| 6006 | 30 | 55 | 13 | 13.8 | 8.30 | 17,000 |
| 6007 | 35 | 62 | 14 | 16.8 | 10.2 | 15,000 |
| 6008 | 40 | 68 | 15 | 17.8 | 11.6 | 13,000 |
| 6009 | 45 | 75 | 16 | 22.1 | 14.6 | 12,000 |
| 6010 | 50 | 80 | 16 | 22.9 | 16.6 | 11,000 |
| 6011 | 55 | 90 | 18 | 29.1 | 21.2 | 10,000 |
| 6012 | 60 | 95 | 18 | 30.7 | 23.2 | 9,500 |
| 6014 | 70 | 110 | 20 | 39.0 | 31.0 | 8,000 |
| 6016 | 80 | 125 | 22 | 47.5 | 40.0 | 7,000 |
| 6018 | 90 | 140 | 24 | 60.5 | 54.0 | 6,300 |
| 6020 | 100 | 150 | 24 | 63.7 | 60.0 | 6,000 |
| Designation | Bore d (mm) | OD D (mm) | Width B (mm) | Dynamic C (kN) | Static C₀ (kN) | Limiting speed (rpm, grease) |
|---|---|---|---|---|---|---|
| 6200 | 10 | 30 | 9 | 5.85 | 2.36 | 28,000 |
| 6201 | 12 | 32 | 10 | 7.28 | 3.10 | 26,000 |
| 6202 | 15 | 35 | 11 | 8.06 | 3.75 | 24,000 |
| 6203 | 17 | 40 | 12 | 9.95 | 4.75 | 20,000 |
| 6204 | 20 | 47 | 14 | 13.5 | 6.55 | 17,000 |
| 6205 | 25 | 52 | 15 | 14.8 | 7.80 | 15,000 |
| 6206 | 30 | 62 | 16 | 20.3 | 11.2 | 13,000 |
| 6207 | 35 | 72 | 17 | 27.0 | 15.3 | 11,000 |
| 6208 | 40 | 80 | 18 | 32.5 | 19.0 | 10,000 |
| 6209 | 45 | 85 | 19 | 35.1 | 21.6 | 9,000 |
| 6210 | 50 | 90 | 20 | 37.1 | 23.2 | 8,500 |
| 6211 | 55 | 100 | 21 | 46.2 | 29.0 | 7,500 |
| 6212 | 60 | 110 | 22 | 55.3 | 36.0 | 7,000 |
| 6213 | 65 | 120 | 23 | 58.5 | 40.5 | 6,300 |
| 6214 | 70 | 125 | 24 | 63.7 | 45.0 | 6,000 |
| 6215 | 75 | 130 | 25 | 68.9 | 49.0 | 5,600 |
| 6216 | 80 | 140 | 26 | 72.8 | 55.0 | 5,300 |
| 6217 | 85 | 150 | 28 | 87.1 | 64.0 | 4,800 |
| 6218 | 90 | 160 | 30 | 101 | 73.5 | 4,500 |
| 6220 | 100 | 180 | 34 | 124 | 93.0 | 4,000 |
| 6222 | 110 | 200 | 38 | 146 | 112 | 3,600 |
| 6224 | 120 | 215 | 40 | 146 | 118 | 3,400 |
| 6226 | 130 | 230 | 40 | 156 | 132 | 3,200 |
| 6228 | 140 | 250 | 42 | 174 | 153 | 2,800 |
| 6230 | 150 | 270 | 45 | 186 | 170 | 2,600 |
| Designation | Bore d (mm) | OD D (mm) | Width B (mm) | Dynamic C (kN) | Static C₀ (kN) | Limiting speed (rpm, grease) |
|---|---|---|---|---|---|---|
| 6300 | 10 | 35 | 11 | 8.06 | 3.40 | 24,000 |
| 6301 | 12 | 37 | 12 | 9.75 | 4.15 | 22,000 |
| 6302 | 15 | 42 | 13 | 11.4 | 5.40 | 20,000 |
| 6303 | 17 | 47 | 14 | 14.3 | 6.80 | 18,000 |
| 6304 | 20 | 52 | 15 | 16.8 | 7.80 | 15,000 |
| 6305 | 25 | 62 | 17 | 23.4 | 11.6 | 13,000 |
| 6306 | 30 | 72 | 19 | 29.6 | 16.0 | 11,000 |
| 6307 | 35 | 80 | 21 | 35.1 | 19.0 | 10,000 |
| 6308 | 40 | 90 | 23 | 42.3 | 24.0 | 9,000 |
| 6309 | 45 | 100 | 25 | 55.3 | 31.5 | 8,000 |
| 6310 | 50 | 110 | 27 | 65.0 | 38.0 | 7,000 |
| 6311 | 55 | 120 | 29 | 74.1 | 45.0 | 6,300 |
| 6312 | 60 | 130 | 31 | 85.2 | 52.0 | 6,000 |
| 6313 | 65 | 140 | 33 | 96.2 | 60.0 | 5,300 |
| 6314 | 70 | 150 | 35 | 110 | 68.0 | 5,000 |
| 6315 | 75 | 160 | 37 | 119 | 76.5 | 4,500 |
| 6316 | 80 | 170 | 39 | 130 | 86.5 | 4,300 |
| 6317 | 85 | 180 | 41 | 140 | 96.5 | 4,000 |
| 6318 | 90 | 190 | 43 | 163 | 114 | 3,800 |
| 6320 | 100 | 215 | 47 | 174 | 140 | 3,400 |
| 6322 | 110 | 240 | 50 | 203 | 166 | 3,000 |
| 6324 | 120 | 260 | 55 | 229 | 190 | 2,600 |
| 6326 | 130 | 280 | 58 | 245 | 220 | 2,400 |
| 6328 | 140 | 300 | 62 | 274 | 245 | 2,200 |
| 6330 | 150 | 320 | 65 | 276 | 265 | 2,000 |
Every SKF bearing part number ends with 0-3 suffixes that describe the seal, cage, clearance, and preservative:
| Suffix | Meaning |
|---|---|
| (none) | Open bearing, no seals, no shields |
| Z / 2Z | One / two metal shields (non-contact); grease-retained for medium-speed service |
| RS / 2RS | One / two contact rubber seals; better dust exclusion, slightly higher friction |
| RSH / 2RSH | Improved contact seals — SKF's higher-friction, high-dust-exclusion seal (Grease Lubricant Life extended) |
| RS1 / 2RS1 | Nitrile (NBR) seals to older SKF designation; largely superseded by RSH |
| RSL / 2RSL | Low-friction contact seals; between Z and RS in friction; SKF's compromise design |
| N / NR | Snap ring groove on OD (N) or snap ring groove + snap ring (NR) |
| M | Machined brass cage (typical for medium-large sizes) |
| MA / MB / MP | Machined brass cage with variant guiding (MA = outer-ring guided, MB = inner-ring guided, MP = ball-guided) |
| J | Pressed steel cage (default on many small sizes) |
| TN / TN9 | Polyamide 6.6 cage; TN9 is the fibre-reinforced variant, service to 120 °C |
| C0 / CN | Standard clearance (default; usually omitted) |
| C2 | Reduced radial clearance (interference-fit-preloaded shaft applications) |
| C3 | Increased radial clearance beyond normal (compensates thermal expansion; electric motor default) |
| C4 | Radial clearance greater than C3 (higher-temperature or heavier-fit applications) |
| C5 | Radial clearance greater than C4 (specialised) |
| P5 / P6 / P4 / P2 | Precision-tolerance classes (P2 tightest, ABEC 9 equivalent) |
| W64F / W64 | SKF Life-lubricated bearing (factory-sealed for maintenance-free service) |
Example: SKF 6205-2RSH/C3 = 25 mm bore, light 6200 series, both sides sealed with SKF's high-performance contact seal, radial clearance C3 (extended for a motor fit). SKF 6205-2Z/C3 = same bore but with metal shields instead of rubber seals.
All 6xxx-series deep groove ball bearings are dimensionally interchangeable between all major bearing makers per ISO 15; only the suffix code varies by manufacturer:
| Feature | SKF | FAG | NSK | NTN | Timken | Koyo |
|---|---|---|---|---|---|---|
| Open | 6205 | 6205 | 6205 | 6205 | 205K | 6205 |
| Metal shield both sides | 6205-2Z | 6205-2ZR | 6205ZZ | 6205ZZ | 205KDD | 6205ZZ |
| Contact seal both sides | 6205-2RS / 2RSH | 6205-2RSR | 6205DDU / DDU2 | 6205LLU | 205PP | 6205 2RS |
| Increased clearance | C3 | C3 | C3 | C3 | — | C3 |
| Polyamide cage | TN9 | TVH | T | T2 | — | TN |
Example: SKF 6205-2RSH/C3 = FAG 6205-2RSR-C3 = NSK 6205DDUC3 = NTN 6205LLU/C3 = Timken 205PPC3 = Koyo 6205 2RS C3. All install interchangeably; load rating differs by ±10 % between makers depending on ISO 281 life-modification factor aISO.
If any single bearing accounts for the largest share of industrial spare-parts consumption, it is the 6205-2RSH. It sits inside the shaft-end of electric motor frames from ~0.75 to 5.5 kW (NEMA 145T / IEC 90S), on the fan-end of countless HVAC air-handling units, on gearbox output shafts, in pumps, in printer rollers, in food conveyor drives, in agricultural machinery, in automotive alternators and in domestic washing machines and dishwashers. Standard replacement is 25 mm bore × 52 mm OD × 15 mm width, both sides sealed with contact rubber seal, C3 clearance for motor fit. In an emergency, any maker's 6205-2RS/C3 will fit and function; SKF's -2RSH offers longer scheduled maintenance interval on high-dust exposure.
Q: What's the difference between 6205-2RS and 6205-2RSH? Both are SKF nomenclature for deep-groove ball bearings with contact rubber seals on both sides. 2RSH is the newer, higher-performance seal design with improved dust/water exclusion at the cost of slightly higher friction. 2RS is the earlier designation. On a bearing supplied today, 2RSH is what SKF ships; the two are functionally interchangeable in most applications.
Q: Is 6205 C3 the same as 6205 CN? No — CN (or C0, both are "normal" clearance) is standard; C3 is INCREASED clearance. For electric motor service, C3 is the standard specification because the bearing warms up in operation and needs radial space to expand. Using CN in a motor risks thermal-lockup and premature failure.
Q: When do I choose 6000 vs 6200 vs 6300 series at the same bore? At 25 mm bore: 6005 (6000 series, extra light) = 47 mm OD, C=11.9 kN; 6205 (6200 series, light) = 52 mm OD, C=14.8 kN; 6305 (6300 series, medium) = 62 mm OD, C=23.4 kN. Choose 6000 for lightest-load applications where a small OD is critical (compact machines, small motors); 6200 for general use (default choice); 6300 for higher-load applications where OD space allows. The step in load rating is about 25 % from series to series.
Q: Can I use a 2Z-shielded bearing where a 2RS-sealed one was specified? Not usually — the 2Z shield does not exclude water or fine dust. Sealed 2RS bearings are specified where wash-down water, aerosols, or fine particulate would enter a shielded bearing. Downgrading 2RS to 2Z shortens service life; upgrading 2Z to 2RS raises friction and reduces limiting speed marginally.
Dimensions and load ratings above are the SKF General Catalogue nominal values for the standard open-, shielded- and sealed-bearing variants. Confirm the specific suffix combination against the SKF current product data sheet before ordering. All values calculated to ISO 76 (static) and ISO 281 (dynamic) with SKF's aISO life-modification factor. Cross-maker interchange holds dimensionally per ISO 15; load ratings vary by ±10 % between makers.