Cylindrical Roller Bearings
N309 Cylindrical Roller Bearing
45 × 100 × 25 mm
N309 is a cylindrical roller bearing from the N3 series with a 45 mm bore, a 100 mm outside diameter and a 25 mm width. It has a dynamic load rating of 71,100 N and a static load rating of 69,750 N and a speed rating of 7,560 rpm (oil lubrication), weighing about 0.857 kg. The radial cross-section (D − d) is 55 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
N309 Specifications
| Bearing No. | N309 |
|---|---|
| d (Bore) | 45 mm |
| D (Outer Dia.) | 100 mm |
| B (Width) | 25 mm |
| Dynamic Load | 71,100 N |
| Static Load | 69,750 N |
| Max. RPM | 7,560 |
| Weight | 0.857 kg |
| Series | N3 Series Single Row Cylindrical Roller Bearings |
N309 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the N3 series page.
N309 C3
radial clearance larger than normal
N309 M
machined brass cage
N309 K
tapered bore (1:12)
N309 P6
higher running accuracy (ISO class 6)
Neighbouring Sizes in the N3 Series
N309 — Frequently Asked Questions
What are the dimensions of the N309 bearing?
The N309 has a bore (d) of 45 mm, an outside diameter (D) of 100 mm and a width of 25 mm, so it is written 45 × 100 × 25 mm.
What is the load rating of the N309?
Dynamic load rating 71,100 N and static load rating 69,750 N. The speed rating is 7,560 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the N309 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include N309 C3 (radial clearance larger than normal), N309 M (machined brass cage), N309 K (tapered bore (1:12)), N309 P6 (higher running accuracy (ISO class 6)). Tell us the exact designation you need in a quote request.
Which other bearings have the same 45 mm bore as the N309?
Other cylindrical roller bearings with a 45 mm bore include NU1009 (75 mm OD), N209 (85 mm OD), NF209 (85 mm OD), NJ209 (85 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the N309 bearing across India?
Yes. Logass Trade Centre supplies the N309 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 N309?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.