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Drawing of 30308 JR: ⌀40 × ⌀90 × 25.25 mm⌀90⌀40T 25.25α30308 JR
Fig. 1: 30308 JR, 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 JR

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

Bearing Koyo 30308 JR

€15.87per piece
In stock: 49 pcs
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Specifications

Manufacturer number
Equivalents
1 exact, 7 approximate
d
40 mm
Bore diameter dBearing bore = shaft diameter. Source: two supplier sources
D
90 mm
Outside diameter DOutside diameter = housing bore. Source: two supplier sources
T
25.25 mm
Total width TOverall width of an assembled tapered roller bearing. Source: two supplier sources
C
113 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
101 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
m
0.757 kg
MassWeight of the product. Source: supplier data
01

Equivalents

the same size 40 × 90 × 25.25 from other brands

22 products
Photo: 30308 JR
You are viewingKoyo 30308 JR
€15.87baseline for the price comparison

Same size, different design: the difference is written in the row.

  • Cross-section drawing to size: Tapered roller, 40 × 90 × T 25.25 mm31308different series: 31308CT40 × 90 × ?22 pcs€3.61−€12.26Request a quote
  • Cross-section drawing to size: Tapered roller, 40 × 90 × T 25.25 mm31308different series: 31308NTE40 × 90 × ?194 pcs€4.92−€10.95Request a quote
  • Photo: 31308 A31308 Adifferent series: 31308Z&S40 × 90 × 23available to order€9.63−€6.24Request a quote
  • Cross-section drawing to size: Tapered roller, 40 × 90 × T 25.25 mm31308different series: 31308no brand40 × 90 × ?available to orderon requestRequest a quote
  • Cross-section drawing to size: Tapered roller, 40 × 90 × T 25.25 mm27308 (31308)different series: 31308CT40 × 90 × ?available to orderon requestRequest a quote
  • Photo: 31308 A31308 Adifferent series: 31308FAG40 × 90 × 23out of stockon requestRequest a quote
  • Cross-section drawing to size: Tapered roller, 40 × 90 × T 25.25 mm31308 J2/QCL7CJ2, QCL7C: not decodedSKF40 × 90 × ?available to orderon requestRequest a quote

Under the price: the difference from the price of this bearing (€15.87).
02

Details

what this bearing is, questions

About the bearing

d×D×Tsize 40 × 90 × 25.25mm
Cdynamic 113kN
C0static 101kN
mweight 0.757kg

Tapered roller bearing 30308 JR.

C, C₀, m: Koyo data. Another brand publishes its own figures, so compare them against that brand’s catalogue.

Frequently asked questions

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.

03

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