Angular Contact Ball Bearings
7311 Angular Contact Ball Bearing
55 × 120 × 29 mm
7311 is a angular contact ball bearing from the 73 series with a 55 mm bore, a 120 mm outside diameter and a 29 mm width. It has a dynamic load rating of 77,400 N and a static load rating of 55,350 N and a speed rating of 7,740 rpm (oil lubrication), weighing about 1.39 kg. The radial cross-section (D − d) is 65 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
7311 Specifications
| Bearing No. | 7311 |
|---|---|
| d (Bore) | 55 mm |
| D (Outer Dia.) | 120 mm |
| B (Width) | 29 mm |
| Dynamic Load | 77,400 N |
| Static Load | 55,350 N |
| Max. RPM | 7,740 |
| Weight | 1.39 kg |
| Series | 73 Series Single Row Angular Contact Ball Bearings |
7311 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the 73 series page.
7311-2RS
rubber seals on both sides
7311-ZZ
metal shields on both sides
7311 M
machined brass cage
Neighbouring Sizes in the 73 Series
7311 — Frequently Asked Questions
What are the dimensions of the 7311 bearing?
The 7311 has a bore (d) of 55 mm, an outside diameter (D) of 120 mm and a width of 29 mm, so it is written 55 × 120 × 29 mm.
What is the load rating of the 7311?
Dynamic load rating 77,400 N and static load rating 55,350 N. The speed rating is 7,740 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the 7311 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include 7311-2RS (rubber seals on both sides), 7311-ZZ (metal shields on both sides), 7311 M (machined brass cage). Tell us the exact designation you need in a quote request.
Which other bearings have the same 55 mm bore as the 7311?
Other angular contact ball bearings with a 55 mm bore include 7911 (80 mm OD), 7011 (90 mm OD), 3211 (100 mm OD), 5211 (100 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the 7311 bearing across India?
Yes. Logass Trade Centre supplies the 7311 Pan India with technical support, from single pieces to bulk orders. Use the quote button to share your quantity and brand preference.
Need pricing on the 7311?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.