Deep Groove Ball Bearings
6311 K Bearing
55 × 120 × 29 mm
Also written 6311/K
6311 K is the 6311 deep groove ball bearing (55 mm bore, 120 mm outside diameter) with the option K. The standard-design dimensions below come from our 6300 series table.
6311 K Specifications
Standard-design values for 6311. Load and speed ratings can differ for sealed or special versions; we confirm them on quotation.
| Bearing No. | 6311 |
|---|---|
| d (Bore) | 55 mm |
| D (Outer Dia.) | 120 mm |
| B (Width) | 29 mm |
| Dynamic Load | 64,350 N |
| Static Load | 40,500 N |
| Max. RPM | 6,120 |
| Weight | 1.37 kg |
| Series | 6300 Series Single Row Deep Groove Ball Bearings |
Reading the Designation 6311 K
| 6311 | Base size: deep groove ball bearing, 55 × 120 × 29 mm. |
|---|---|
| K | tapered bore, taper 1:12 |
Suffix meanings vary slightly between manufacturers (SKF, FAG, NTN, NSK and others each have their own codes), so we always confirm the exact designation before supplying.
Other Bearings with a 55 mm Bore
6311 K — Frequently Asked Questions
What are the dimensions of the 6311 K bearing?
The base size 6311 measures 55 × 120 × 29 mm (bore × outside diameter × width). Suffixes such as K change the sealing, clearance, cage or special treatment but not the boundary dimensions of the standard design.
What does 6311 K mean?
6311 is the base size. K: tapered bore, taper 1:12. Suffix meanings can differ slightly between manufacturers, so confirm the exact designation with us before ordering.
Can you supply the 6311 K bearing across India?
Yes. Share the exact designation, quantity and preferred brand through the quote button and our technical team will confirm availability and pricing within one business day.
Can’t find your size?
We supply sizes, brands and special versions of deep groove ball bearings that are not listed on this page. Type the exact size or designation you need and send it to us for a quote.
Need pricing on 6311 K?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.