Spherical Roller Bearings
21311 Spherical Roller Bearing
55 × 120 × 29 mm
21311 is a spherical roller bearing from the 213 series with a 55 mm bore, a 120 mm outside diameter and a 29 mm width. It has a dynamic load rating of 130,500 N and a static load rating of 146,700 N and a speed rating of 2,970 rpm (oil lubrication), weighing about 1.71 kg. The radial cross-section (D − d) is 65 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
21311 Specifications
| Bearing No. | 21311 |
|---|---|
| d (Bore) | 55 mm |
| D (Outer Dia.) | 120 mm |
| B (Width) | 29 mm |
| Dynamic Load | 130,500 N |
| Static Load | 146,700 N |
| Max. RPM | 2,970 |
| Weight | 1.71 kg |
| Series | 213 Series Double Row Spherical Roller Bearings |
21311 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the 213 series page.
21311 C3
radial clearance larger than normal
21311 K
tapered bore (1:12)
21311 K30
tapered bore (1:30)
21311/CA
machined brass cage, one piece
21311/W33
oil groove and holes in the outer ring
Neighbouring Sizes in the 213 Series
21311 — Frequently Asked Questions
What are the dimensions of the 21311 bearing?
The 21311 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 21311?
Dynamic load rating 130,500 N and static load rating 146,700 N. The speed rating is 2,970 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the 21311 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include 21311 C3 (radial clearance larger than normal), 21311 K (tapered bore (1:12)), 21311 K30 (tapered bore (1:30)), 21311/CA (machined brass cage, one piece). Tell us the exact designation you need in a quote request.
Which other bearings have the same 55 mm bore as the 21311?
Other spherical roller bearings with a 55 mm bore include 22211 (100 mm OD), 22311 (120 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the 21311 bearing across India?
Yes. Logass Trade Centre supplies the 21311 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 21311?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.