Spherical Roller Bearings
21308 Spherical Roller Bearing
40 × 90 × 23 mm
21308 is a spherical roller bearing from the 213 series with a 40 mm bore, a 90 mm outside diameter and a 23 mm width. It has a dynamic load rating of 79,200 N and a static load rating of 81,000 N and a speed rating of 2,970 rpm (oil lubrication), weighing about 0.705 kg. The radial cross-section (D − d) is 50 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
21308 Specifications
| Bearing No. | 21308 |
|---|---|
| d (Bore) | 40 mm |
| D (Outer Dia.) | 90 mm |
| B (Width) | 23 mm |
| Dynamic Load | 79,200 N |
| Static Load | 81,000 N |
| Max. RPM | 2,970 |
| Weight | 0.705 kg |
| Series | 213 Series Double Row Spherical Roller Bearings |
21308 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the 213 series page.
21308 C3
radial clearance larger than normal
21308 K
tapered bore (1:12)
21308 K30
tapered bore (1:30)
21308/CA
machined brass cage, one piece
21308/W33
oil groove and holes in the outer ring
Neighbouring Sizes in the 213 Series
21308 — Frequently Asked Questions
What are the dimensions of the 21308 bearing?
The 21308 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 21308?
Dynamic load rating 79,200 N and static load rating 81,000 N. The speed rating is 2,970 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the 21308 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include 21308 C3 (radial clearance larger than normal), 21308 K (tapered bore (1:12)), 21308 K30 (tapered bore (1:30)), 21308/CA (machined brass cage, one piece). Tell us the exact designation you need in a quote request.
Which other bearings have the same 40 mm bore as the 21308?
Other spherical roller bearings with a 40 mm bore include 22208 (80 mm OD), 22308 (90 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the 21308 bearing across India?
Yes. Logass Trade Centre supplies the 21308 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 21308?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.