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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:
1 in stock
Deep groove ball bearing, 55 x 120 x 29 mm, open, straight bore, outer ring snap ring groove with retaining ring fitted. ISO 6311 NR envelope.
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1 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 311KG |
| GTIN | 087796067141 |
| Model | 6311NR |
| Bearing Type | Ball Bearing, Open |
| ID | 55 mm |
| OD | 120 mm |
| Width | 29 mm |
| Series | 300K |
|---|---|
| Lubricant | Oil/Grease |
| Base Number | 311K |
| Overall Width | 29 mm |
| Mpn Variants | 311KG; 311 KG; 311-K-G; 6311-NR; 6311NR |
| Precision Class | Not specified |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Snap ring fitted |
| Internal Clearance | CN |
| Bearing Material | Chrome steel |
| Industry Terms | snap ring groove ball bearing; deep groove bearing with snap ring; 6311 NR bearing; Conrad ball bearing; 55x120x29 bearing |
| Common Misspellings | Fafnir 311 KG; Fanir 311KG; Fafnar 311KG; Faffnir 311KG; 311KG bearing |
| Application Types | Electric motors; gearboxes; pumps; industrial machinery; axial location in housings |
| Cross Reference 1 | SKF 6311 NR |
|---|---|
| Cross Reference 2 | FAG 6311-NR |
| Cross Reference 3 | NSK 6311NR |
| Cross Reference 4 | NTN 6311NR |
| Cross Reference 5 | Koyo 6311NR |
| Cross Reference 6 | 6311 (related size, no snap ring groove) |
Fafnir 311KG, a single-row deep groove ball bearing with a snap ring groove in the outer ring and the snap ring fitted. Unit Quantity: 1 Pc.
311 — the 300 heavy dimension series, bore code 11, which maps to the ISO 6311 envelope: 55 mm bore, 120 mm outside diameter, 29 mm width.
K — deep groove Conrad construction, which carries radial load and axial load from either direction and has no contact angle.
G — a snap ring groove machined in the outside diameter of the outer ring.
Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 29 mm. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Snap Ring Included: Snap ring fitted. Internal Clearance: CN. Bearing Material: Chrome steel. Series: 300K. Base Number: 311K. GTIN: 087796067141.
Envelope: 55 x 120 x 29 mm. The snap ring seats in the outer ring groove and locates the bearing axially against the housing face. Closure Type: Open.
ISO 6311 NR envelope, 55 x 120 x 29 mm. Crosses: SKF 6311 NR, FAG 6311-NR, NSK 6311NR, NTN 6311NR, Koyo 6311NR. A plain 6311 has no snap ring groove. Variants: 311KG, 311 KG, 311-K-G, 6311-NR, 6311NR.
Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 29 mm.
Yes. The outer ring has a snap ring groove and the snap ring is fitted.
Closure Type: Open. Internal Clearance: CN.
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