21309K-C3
Tier-one manufacturer — brand supplied may vary ✓ Bore checked against the ISO tableRegular price
$86.95 USD
Regular price
Sale price
$86.95 USD
Unit price
per
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Bore45 mm
1.7717 in
Outside dia.100 mm
3.937 in
Width25 mm
0.9843 in
TypeSpherical roller bearing
SealingOpen
ClearanceC3
Ships separately from our European warehouse — shipping from $79, quoted at checkout
Ships from our European partner stock — allow 5–8 business days
Ships from our European partner stock — allow 5–8 business days
Image is for illustration purposes only.
What 21309K-C3 means
| Code | Position | Meaning |
|---|---|---|
2 |
Type | Spherical roller bearing |
1 |
Width series | Width series 1 |
3 |
Diameter series | Diameter series 3 (medium) |
09 |
Bore | Bore code 09 × 5 = 45 mm |
K |
Bore type | Tapered bore, taper 1:12 (mounts on an adapter or withdrawal sleeve) |
C3 |
Internal clearance | C3: radial internal clearance greater than Normal |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
21309K-C3 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 45 mm | 1.7717 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 100 mm | 3.937 in | Supplier catalogue listing |
| Width (B) | 25 mm | 0.9843 in | Supplier catalogue listing |
| Bearing type | Spherical roller bearing | Stated by the designation | |
| Seals / shields | Open (no seals or shields) | Stated by the designation | |
| Internal clearance | C3 (greater than Normal) | Stated by the designation | |
| Bore | Tapered bore (1:12) | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
21309K-C3 is a spherical roller bearing, 45 mm bore × 100 mm OD × 25 mm wide (1.7717 × 3.937 × 0.9843 in). It has C3 internal clearance and a tapered bore (1:12).
The 21309K-C3 is a spherical roller bearing with a 45 mm tapered bore (1:12 taper) and C3 radial internal clearance. The tapered bore design allows for mounting directly on tapered shafts or adapter sleeves, while the C3 clearance accommodates thermal expansion in applications with higher operating temperatures or interference fits.
Inner Diameter (ID)
45 mm
Series
213
Bearing Type
Spherical roller bearing
