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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
31 in stock
Open heavy-series deep groove ball bearing, 32 mm bore x 75 mm OD x 20 mm wide. A non-standard bore size carrying a heavier ball complement than a light-series bearing. Sold as 1 piece.
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31 in stock
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| MFR / Brand | SKF |
|---|---|
| MPN | 63/32 |
| GTIN | 7316571146225 |
| Model | 63-32 |
| Bearing Type | Deep Groove Ball Bearing |
| ID | 32 mm |
| OD | 75 mm |
| Width | 20 mm |
| Material | Steel |
|---|---|
| Base Number | 63/32 |
| Industry Terms | Deep groove ball bearing, radial ball bearing, 32mm bore bearing, heavy series ball bearing, open ball bearing, 32x75x20 bearing |
| Common Misspellings | 6332, 63 32, 63/32 C3, SKF 6332, 63x32 |
| Application Types | Gearboxes, electric motors, pumps, agricultural drives, conveyor and line shafting |
| Total Width | 20 mm |
| Bore Shaft Size | 32 mm |
| Mpn Variants | 63/32, 6332/32, 63-32, 63 32, 6332C |
| Rolling Elements | Balls |
| Number Of Rows | 1 |
| Snap Ring Included | Not specified |
| Internal Clearance | CN (normal) |
| Design Units | Metric |
| Bearing Material | Through-hardened bearing steel |
| Series | 63 (heavy dimension series) |
| Part Number | 63/32 |
A single-row deep groove ball bearing, 32 mm bore by 75 mm outside diameter by 20 mm wide, open on both sides. It belongs to the 63 heavy dimension series, so it uses a bigger ball complement and a heavier section than the light-series bearings usually fitted to a 32 mm shaft. Deep groove ball bearings take radial load plus axial load in either direction.
6 — single-row deep groove ball bearing.
3 — dimension series 63, the heavy section and width.
/32 — the slash form marks a bore stated directly in millimetres. The bore is 32 mm exactly.
No closure suffix — open both sides. A 2Z is metal shields and a 2RS1 rubber contact seals.
No clearance suffix — normal (CN) radial internal clearance.
A designation read as 6332 is a 160 mm bore bearing, a different part. 63/32 is the 32 mm bore.
32 mm is an odd shaft size, and the reason to reach for 63/32 rather than a 6207 or 6307 with an adapter is load. The heavy 63 section fits the largest balls that geometry allows, which buys capacity and life at the cost of a larger outer diameter and a lower speed ceiling than a light-series bearing of the same bore.
Being open, it takes lubrication on assembly and sealing from the housing. An open bearing relubricates freely and runs in flow-through oil, which is why gearboxes prefer it.
Bore: 32 mm.
Outside Diameter: 75 mm.
Width: 20 mm.
Dimension series: 63, heavy.
Number of rows: 1.
Rolling elements: balls.
Closure Type: open, both sides.
Internal Clearance: normal (CN).
Bearing Material: through-hardened bearing steel.
Unit Quantity: 1 Pc.
EAN: 7316571146225.
Unit Quantity: 1 Pc, one open bearing.
Standard shaft fit for a rotating inner ring under normal load: k5 or k6, with an H7 housing bore.
Grease fill for general duty: approximately one third of the free internal space.
Genuine same-envelope interchanges are the 32 x 75 x 20 mm deep groove bearings from other makers: FAG 63/32, NSK 63/32, NTN 63/32 and Koyo 63/32. A 6207 (35 x 72 x 17) and a 6007 (35 x 62 x 14) are different bores and sections, so those are related sizes rather than equivalents. A 63/32-2RS1 or 63/32-2Z is the same envelope with a different closure, which changes lubrication and sealing duty.
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