Cylindrical Roller Bearings
NJ311 Cylindrical Roller Bearing
55 × 120 × 29 mm
NJ311 is a cylindrical roller bearing from the NJ3 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
NJ311 Specifications
| Bearing No. | NJ311 |
|---|---|
| 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 | NJ3 Series Single Row Cylindrical Roller Bearings |
NJ311 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the NJ3 series page.
NJ311 C3
radial clearance larger than normal
NJ311 M
machined brass cage
NJ311 K
tapered bore (1:12)
NJ311 P6
higher running accuracy (ISO class 6)
Neighbouring Sizes in the NJ3 Series
NJ311 — Frequently Asked Questions
What are the dimensions of the NJ311 bearing?
The NJ311 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 NJ311?
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 NJ311 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include NJ311 C3 (radial clearance larger than normal), NJ311 M (machined brass cage), NJ311 K (tapered bore (1:12)), NJ311 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 NJ311?
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 NJ311 bearing across India?
Yes. Logass Trade Centre supplies the NJ311 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 NJ311?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.