21305 Spherical Roller Bearing Dimensions
The ENRO 21305 is a spherical roller bearing in the 21300 series, 25 × 62 × 17 mm. Boundary dimensions follow the ISO 15 dimension series.
Three checks for the 21305
Most wrong replacements come from one of these. Each answer below comes from the ENRO model table.
Does the size match?
Measure bore, outside diameter and width. The 21305 is 25 × 62 × 17 mm. If one value differs, see the adjacent sizes below.
Adjacent sizes →Which version do you need?
ENRO lists one version: 21305W33. Match the seals, shields or bore type of the old bearing.
Versions table →Is the load rating enough?
Catalog ratings for the 21305 are pending confirmation. Send your load and speed with the RFQ.
Request ratings →Not sure which one you have? Send any part number and we'll match the dimensionally equivalent ENRO model.
Check my 2130521305 dimensions and ratings
| Bore diameterd | 25 mm |
|---|---|
| Outside diameterD | 62 mm |
| WidthB | 17 mm |
| Chamfer dimension, min.r min | 1.1 mm |
| Basic dynamic load ratingCr | On request |
| Basic static load ratingC0r | On request |
| Limiting speed, greasen grease | On request |
| Limiting speed, oiln oil | On request |
| Weight (approx.)m | On request |
| Series | 21300 |
| Material | GCr15 / GCr15SiMn chrome steel |
| Precision class | P0, P6 |
| Cage | Steel, brass |
| Origin | Made in China — Japanese-standard quality management |
Cr, C0r, limiting speeds and weight for the 21305 are catalog values pending confirmation and are shown as “On request”. ENRO does not estimate them; the confirmed values are sent with your quote.
What “21305” means
- 213 — bearing type and dimension series code.
- 05 — bore code: code 05 × 5 = 25 mm.
21305 variants: 21305W33
| Order as | Meaning |
|---|---|
| 21305W33 | Lubrication groove and holes. Groove and holes in the outer ring for relubrication. |
Internal clearance (for example CN or C3) is stated on your RFQ. Suffix selector →
Print or save this table as PDF, or ask us to send the spec sheet with your quote.
Selection notes for the 21305
How this size sits against its neighbours in the 21300 series and the other spherical roller bearing series with the same bore. Every figure is from the ENRO model table.
- The 21305 is the first of sixteen sizes ENRO lists in the 21300 series, 25 × 62 × 17 mm.
- Next size up, the 21306, is 30 × 72 × 19 mm: five millimetres more bore, ten millimetres more outside diameter, two millimetres wider.
- One other ENRO spherical roller bearing shares the 25 mm bore: the 22205 (22200 series) is 52 × 18 mm, ten millimetres less outside diameter and one millimetre wider.
- The 21305 has a radial section of 18.5 mm ((D − d) / 2) on a 17 mm width, so its cross-section is taller than it is wide.
- ENRO lists the 21305 in one version: 21305W33. In the same series, the 21306 is listed adding tapered bore 1:12 + lubrication groove and holes.
21305 bearing dimensions: range and series
16 sizes in the 21300 series.
Click a model to open its full specification page.
| Model | d mm | D mm | B mm | Cr kN | C0r kN | Grease rpm | Weight kg | Open model page |
|---|---|---|---|---|---|---|---|---|
| 21305 | 25 | 62 | 17 | On request | On request | On request | On request | This page |
| 21306 | 30 | 72 | 19 | 55 | 61 | 7,500 | 0.41 | |
| 21307 | 35 | 80 | 21 | 65 | 72 | 6,700 | 0.55 | |
| 21308 | 40 | 90 | 23 | 104 | 108 | 7,000 | 0.75 | |
| 21309 | 45 | 100 | 25 | 125 | 127 | 6,300 | 0.99 | |
| 21310 | 50 | 110 | 27 | 156 | 166 | 5,600 | 1.35 | |
| 21311 | 55 | 120 | 29 | 158 | 166 | 5,600 | 1.70 | |
| 21312 | 60 | 130 | 31 | 212 | 240 | 4,800 | 2.10 | |
| 21313 | 65 | 140 | 33 | 238 | 270 | 4,300 | 2.55 |
Catalog reference values. Full 21300 series table →
If the 21305 is not quite right
Nearest ENRO sizes by bore and by series. Check the housing and shaft before switching.
Other series with a 25 mm bore
Click a model to open its full specification page.
Same 62 mm outside diameter, different bore
Click a model to open its full specification page.
Specifications and boundary dimensions
Built to be checked, not believed. Boundary dimensions follow the ISO 15 dimension series. Ratings follow ISO 281 and clearance groups ISO 5753-1; every value on a model page can be checked against the standard.
Boundary dimensions
Boundary dimensions follow the ISO 15 dimension series. Same base number, same d, D and B.
Tolerances
Defines the tolerance classes for radial bearings. State the class you need on the RFQ.
Internal clearance
Defines the clearance groups C2, CN, C3, C4 and C5. State the group you need on the RFQ.
Rating life
Basis of the L10 basic rating life. Use it with the catalog Cr in our life calculator.
Japan-managed quality control
ENRO is a bearing brand for distributors and MRO buyers. Our QC protocol follows Japanese industrial quality practice. Our bearings are made in China.
100% outgoing inspection
Every ENRO bearing — not a sample, every unit — passes outgoing inspection before shipment.
Same color, same box, same label
Every order ships in the same color box with the same label, so repeat shipments match on the shelf.
How to order the 21305: packing and marking
- Version
- Cylindrical or tapered bore (K, K30), with or without W33.
- Clearance group
- CN, C3 or another group. State it per line.
- Quantity per line
- Quantities per model and whether the order repeats.
- Marking options
- ENRO packing, OEM / private label or neutral packaging. State which one per line.
- Destination
- Port or country the order ships to.
Free samples are available.
Get a quote for a 21305
- Model or part number for each line
- Quantity per line
- Seal or shield, snap ring or bore type
- Clearance group, if not CN
- Destination port or country
We reply within 24 hours on business days.
Quote 21305Engineering tools built on our catalog data
21305 FAQ
What are the dimensions of the 21305 spherical roller bearing?
The 21305 has a bore (d) of 25 mm, an outside diameter (D) of 62 mm and a width (B) of 17 mm. Minimum chamfer r is 1.1 mm.
What load rating does the 21305 have?
Load ratings, speeds and weight for the 21305 are catalog values pending confirmation. No figure is shown until it is confirmed; ask for the values with your RFQ.
Which versions of the 21305 can I order?
ENRO lists the 21305 as 21305W33 (Lubrication groove and holes). State the clearance group you need in your RFQ.
Is the ENRO 21305 interchangeable with other brands' 21305?
Boundary dimensions follow the ISO 15 dimension series. The ENRO 21305 is dimensionally interchangeable with other brands' 21305 of the same size. Confirm seal, clearance and cage requirements in your RFQ.
Where are ENRO bearings made?
ENRO bearings are Made in China by partner factories, under Japan-managed quality control. Every unit passes 100% outgoing inspection before shipment.
Which bearings have the same bore as the 21305?
In the ENRO range, 22205 (25 × 52 × 18 mm) share the 25 mm bore. Outside diameter and width differ, so check the housing before switching.
Which clearance group should I order for the 21305?
CN (normal) suits most positions. C3 is common where the inner ring runs warmer than the outer ring, as in electric motors. Groups are defined in ISO 5753-1; state the one you need in your RFQ.
Quote the 21305
Send any part number and we'll match the dimensionally equivalent ENRO model. We reply within 24 hours on business days.