KG
Drawing of 30308: ⌀40 × ⌀90 × 25.25 mm⌀90⌀40B 23T 25.25C 20α30308
Fig. 1: 30308, end view and section; internal parts simplified per ISO 8826-1. Dimensions in mm

There is no photo of this product: the drawing shows the dimensions of 30308

Combined load at an angle (tapered, high), axial on one sideTapered roller

Bearing KG 30308

Price on request
Available to order

Specifications

Manufacturer number
GOST number
d
40 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
90 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
23 mm
Width BRing width. Source: supplier data
T
25.25 mm
Total width TOverall width of an assembled tapered roller bearing. Source: supplier data
Cup width C
20 mm
Cup width CWidth of the outer ring of a tapered roller bearing. Source: supplier data
C
91.5 kN
Basic dynamic load rating CLoad for one million revolutions at 90 % reliability; the L10 life is calculated from it as (C/P)^p. ISO method, manufacturer’s figure: do not carry it over to another brand. Source: supplier data
C0
102 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
Limiting speed
5,900 rpm
Limiting speedMechanical limit; depends on the seal (SKF 6200: 36,000 open, 17,000 with 2RSH). Source: supplier data
m
0.769 kg
MassWeight of the product. Source: supplier data
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Equivalents

the same size 40 × 90 × 25.25 from other brands

22 products
Series illustration (not a photo of this item): 30308
You are viewingKG 30308

Everything the number specifies matches: series 303, 40 × 90 × 23 mm, ordinary steel, design without special letters. The codes in the number are read against the KG catalogue.

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Details

what this bearing is, questions

About the bearing

d×D×Tsize 40 × 90 × 25.25mm
Cdynamic 91.5kN
C0static 102kN
mweight 0.769kg

Tapered roller bearing 30308. Under GOST the same bearing is designated 7308.

C, C₀, m and limiting speed 5,900 rpm: KG data. Another brand publishes its own figures, so compare them against that brand’s catalogue.

Frequently asked questions

What is 7308?

It is the same bearing under GOST 3189-89: 7308 corresponds to the ISO base 30308. Size 40 × 90 × 25.25 mm, a full equivalent of 30308.

Can I fit another brand instead of this bearing?

Without checking, only an exact equivalent: the size, seal, clearance and design match according to the brand’s catalogue. Positions with the same geometry differ in seal, clearance or design, and each one says so in the equivalents block. Load ratings differ between manufacturers, so for a heavily loaded unit compare C.

How do I get a price and a lead time?

Press “Request a quote” and send the part number and quantity. We reply with the price, availability and delivery terms for your country.

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