Bearing Number Decoder
Enter 6205, 6204-2RS, or 22210 — get bore, OD, width, and type
Bearing number daaliye — bore, OD, width aur type paaiye
Most industrial bearing designations follow the ISO 15 pattern used by SKF, FAG, NSK, NTN, and other major brands. A deep-groove ball bearing like 6205 breaks down as: first digit (6) = bearing type (deep groove ball), second digit (2) = dimension series (light), and the last two digits (05) = bore code. For bore codes 04 and above, bore diameter in mm = code × 5, so 05 means 25 mm bore. For 6205-2RS, the suffix 2RS means rubber seal on both sides. A 6205 has a 25 mm bore, 52 mm outer diameter, and 15 mm width. This decoder understands the 6xxx single-row deep-groove family, 62xx and 63xx series, 22xxx spherical roller bearings, 30xxx tapered rollers, and common suffixes (2RS, ZZ, C3, NR, E). Enter your bearing number and get instant dimensions without looking up a catalogue.
Calculator
Type the number exactly as printed on the bearing. Case-insensitive; spaces ignored.
- 2RSRubber contact seal on both sides — best for dusty factory environments
ƒFormula
Bore (mm) = code × 5 (for codes 04 and above)For 2-digit bore codes 00-03, special rules apply: 00 = 10 mm, 01 = 12 mm, 02 = 15 mm, 03 = 17 mm. From code 04 onward, multiply by 5 to get bore diameter in mm. Bores above 480 mm use a different convention (e.g. /500 denotes 500 mm bore directly).
Units: All dimensions in millimetres (mm)
Bearing number padhna kaise sikhen?
Bearing number sirf ek random code nahin hai, usme bearing ka type, dimension series, aur bore diameter sab encoded hota hai. ISO 15 standard ke hisaab se, 6205 number ko toh ya samjhein: pehla digit (6) = deep groove ball bearing, doosra digit (2) = dimension series (light duty), aur last ke do digits (05) = bore code. Bore code 04 ya usse upar ke liye, bore = code × 5 mm. Toh 05 ka matlab 25 mm bore. Bearing ke body pe likhe suffixes bhi important hain, 2RS matlab rubber seal dono taraf, ZZ matlab metal shield, C3 matlab radial clearance group 3 (zyada clearance, high-speed applications ke liye).
Worked Examples
Decoding 6204-2RS
Problem: A machine manual asks for a 6204-2RS. What does this mean physically?
Solution: 6 = deep groove ball bearing. 2 = light dimension series. 04 = bore code → 04 × 5 = 20 mm bore. Standard 6204 has OD 47 mm and width 14 mm. The -2RS suffix means rubber seal on both sides. Result: 20 × 47 × 14 mm sealed deep-groove ball bearing.
What is a 22210-E1-C3?
Problem: Your conveyor vendor specified a 22210-E1-C3 bearing. What size is it?
Solution: 22 = spherical roller bearing, 2 = dimension series, 10 = bore code → 10 × 5 = 50 mm bore. OD 90 mm, width 23 mm. -E1 = SKF/FAG upgraded internal design (more load capacity). -C3 = extra radial clearance for higher operating temperatures.
Choosing between 6205-2RS and 6205-ZZ
Problem: Both look similar. What's the practical difference?
Solution: Same physical dimensions (25×52×15 mm). -2RS = two rubber contact seals (better dust and moisture protection, slightly higher friction). -ZZ = two metal shields (lower friction, slightly less dust protection). For dusty Indian factory environments, -2RS is usually preferred.
Common Bearing Dimensions, Deep Groove (62xx), Spherical (22xxx), Taper (30xxx)
| Bearing | Bore (mm) | OD (mm) | Width (mm) | Type |
|---|---|---|---|---|
| 6200 | 10 | 30 | 9 | Deep groove ball |
| 6201 | 12 | 32 | 10 | Deep groove ball |
| 6202 | 15 | 35 | 11 | Deep groove ball |
| 6203 | 17 | 40 | 12 | Deep groove ball |
| 6204 | 20 | 47 | 14 | Deep groove ball |
| 6205 | 25 | 52 | 15 | Deep groove ball |
| 6206 | 30 | 62 | 16 | Deep groove ball |
| 6207 | 35 | 72 | 17 | Deep groove ball |
| 6208 | 40 | 80 | 18 | Deep groove ball |
| 6305 | 25 | 62 | 17 | Deep groove ball (heavy) |
| 6306 | 30 | 72 | 19 | Deep groove ball (heavy) |
| 22210 | 50 | 90 | 23 | Spherical roller |
| 22211 | 55 | 100 | 25 | Spherical roller |
| 30204 | 20 | 47 | 15.25 | Tapered roller |
| 30205 | 25 | 52 | 16.25 | Tapered roller |
| 30206 | 30 | 62 | 17.25 | Tapered roller |
All sizes are ISO-standard metric bearings. Suffix codes (2RS, ZZ, C3, NR, E) modify seals, clearance, and design — they don't change main dimensions.
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Shri Narayan Machinery LLP · C-101, Sector 9, Noida · Call +91-9811104037 · GST invoice on every order
SKF Deep Groove Ball Bearings
6200, 6300, 6000 series, 10 mm to 200 mm bore sizes in stock at Noida Sector 9.
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Full bearing range, deep groove, tapered, spherical, thrust, pillow block.
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SKF LGMT 2, LGWA 2, and specialty bearing greases for repack and maintenance.
View productsFrequently Asked Questions: Bearing Number Decoder
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