Cylindrical Roller Bearings
N311 Cylindrical Roller Bearing
55 × 120 × 29 mm
N311 is a cylindrical roller bearing from the N3 series with a 55 mm bore, a 120 mm outside diameter and a 29 mm width. It has a dynamic load rating of 99,900 N and a static load rating of 99,900 N and a speed rating of 6,300 rpm (oil lubrication), weighing about 1.42 kg. The radial cross-section (D − d) is 65 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
N311 Specifications
| Bearing No. | N311 |
|---|---|
| d (Bore) | 55 mm |
| D (Outer Dia.) | 120 mm |
| B (Width) | 29 mm |
| Dynamic Load | 99,900 N |
| Static Load | 99,900 N |
| Max. RPM | 6,300 |
| Weight | 1.42 kg |
| Series | N3 Series Single Row Cylindrical Roller Bearings |
N311 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the N3 series page.
N311 C3
radial clearance larger than normal
N311 M
machined brass cage
N311 K
tapered bore (1:12)
N311 P6
higher running accuracy (ISO class 6)
Neighbouring Sizes in the N3 Series
N311 — Frequently Asked Questions
What are the dimensions of the N311 bearing?
The N311 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 N311?
Dynamic load rating 99,900 N and static load rating 99,900 N. The speed rating is 6,300 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the N311 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include N311 C3 (radial clearance larger than normal), N311 M (machined brass cage), N311 K (tapered bore (1:12)), N311 P6 (higher running accuracy (ISO class 6)). Tell us the exact designation you need in a quote request.
Which other bearings have the same 55 mm bore as the N311?
Other cylindrical roller bearings with a 55 mm bore include NU1011 (90 mm OD), N211 (100 mm OD), NF211 (100 mm OD), NJ211 (100 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the N311 bearing across India?
Yes. Logass Trade Centre supplies the N311 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 N311?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.