6311 Ball Bearing
Size 55 x 120 x 29 mm. Single row deep groove ball bearing by AMB Bearings, Ahmedabad.
The 6311 is a single row deep groove ball bearing from the 6300 series (medium series, for heavier loads). It has a 55 mm bore, a 120 mm outside diameter and is 29 mm wide. It carries radial load with some axial load in both directions and runs smoothly at high speed.
Sizes in this bore range are used in tractor and truck gearboxes, heavy pumps, industrial gear units and machinery. Because 6311 is a standard ISO number, the AMB 6311 fits wherever a 6311 from SKF, NBC, FAG, NTN or any other maker is specified.
6311 types we supply
- 6311 open: no shields or seals. Used where the bearing runs in gearbox oil.
- 6311 N: snap ring groove in the outer ring, so a circlip can locate the bearing in the housing.
- 6311 ZZ: metal shields on both sides. Keeps out dust, low friction, good for higher speeds. Also written 6311 2Z or 6311 Z Z.
- 6311 2RS: rubber seals on both sides. Better against water and fine dirt, ideal for wheels and outdoor use. Also written 6311 2RS1, 6311 LLU or 6311 DDU by other makers.
6311 specifications
| Bearing number | 6311 |
|---|---|
| Type | Single row deep groove ball bearing |
| Bore diameter (d) | 55 mm |
| Outside diameter (D) | 120 mm |
| Width (B) | 29 mm |
| Available as | Open, N, ZZ/2RS |
| Brand | AMB |
| Supplied from | Changodar, Ahmedabad, Gujarat |
| Supply | Pan India dispatch and export |
Main dimensions are the standard ISO values for this number. Tell us your application and we will confirm the right type before dispatch.
How to order 6311 bearings
AMB Bearings supplies the 6311 to dealers, distributors, retailers and workshops across India, in standard and bulk packing, and to importers overseas. Send the quantity and your city on WhatsApp or call +91 99251 38408, and we reply with stock, packing and rates.
Related sizes
See the full Ball bearings range or the size chart.
Frequently asked questions
What is the size of the 6311 bearing?
The 6311 bearing has a 55 mm bore (inner diameter), a 120 mm outside diameter and a width of 29 mm (55 x 120 x 29 mm).
What is the difference between 6311 ZZ and 6311 2RS?
Both are the same size. 6311 ZZ has metal shields that keep out dust with very low friction. 6311 2RS has rubber seals that also keep out water and fine dirt, so it suits wheels and wet or dusty places. For high speed in a clean place choose ZZ; for wheels and outdoor use choose 2RS.
Does AMB supply 6311 bearings in bulk?
Yes. AMB Bearings supplies 6311 in standard and bulk packing to dealers, distributors, retailers and workshops in every state, and exports overseas. Message +91 99251 38408 on WhatsApp for rates.
Need 6311 bearings?
Send quantity and delivery city. We reply with availability, packing and trade rates.