Cylindrical Roller Bearings
N308 Cylindrical Roller Bearing
40 × 90 × 23 mm
N308 is a cylindrical roller bearing from the N3 series with a 40 mm bore, a 90 mm outside diameter and a 23 mm width. It has a dynamic load rating of 52,650 N and a static load rating of 51,300 N and a speed rating of 8,460 rpm (oil lubrication), weighing about 0.643 kg. The radial cross-section (D − d) is 50 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
N308 Specifications
| Bearing No. | N308 |
|---|---|
| d (Bore) | 40 mm |
| D (Outer Dia.) | 90 mm |
| B (Width) | 23 mm |
| Dynamic Load | 52,650 N |
| Static Load | 51,300 N |
| Max. RPM | 8,460 |
| Weight | 0.643 kg |
| Series | N3 Series Single Row Cylindrical Roller Bearings |
N308 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the N3 series page.
N308 C3
radial clearance larger than normal
N308 M
machined brass cage
N308 K
tapered bore (1:12)
N308 P6
higher running accuracy (ISO class 6)
Neighbouring Sizes in the N3 Series
N308 — Frequently Asked Questions
What are the dimensions of the N308 bearing?
The N308 has a bore (d) of 40 mm, an outside diameter (D) of 90 mm and a width of 23 mm, so it is written 40 × 90 × 23 mm.
What is the load rating of the N308?
Dynamic load rating 52,650 N and static load rating 51,300 N. The speed rating is 8,460 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the N308 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include N308 C3 (radial clearance larger than normal), N308 M (machined brass cage), N308 K (tapered bore (1:12)), N308 P6 (higher running accuracy (ISO class 6)). Tell us the exact designation you need in a quote request.
Which other bearings have the same 40 mm bore as the N308?
Other cylindrical roller bearings with a 40 mm bore include NU1008 (68 mm OD), N208 (80 mm OD), NF208 (80 mm OD), NJ208 (80 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the N308 bearing across India?
Yes. Logass Trade Centre supplies the N308 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 N308?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.