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Drawing of 31308 A: ⌀40 × ⌀90 × 25.25 mm⌀90⌀40B 23T 25.25C 17α31308 A
Fig. 1: 31308 A, 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 31308-A

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

Bearing FAG 31308-A

Price on request
Available to order
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Specifications

Manufacturer number
ISO designation
GOST number
OEM number
511.01.329
Equivalents
2 exact, 16 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
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
17 mm
Cup width CWidth of the outer ring of a tapered roller bearing. Source: supplier data
m
0.72 kg
MassWeight of the product. Source: supplier data
01

Equivalents

the same size 40 × 90 × 25.25 from other brands

21 products
Photo: 31308 A
You are viewingFAG 31308-A

Everything the number specifies matches: series 313, 40 × 90 × 23 mm, special design. The codes in the number are read against the FAG catalogue.

  • Photo: 31308 A31308 AThis bearingFAG40 × 90 × 23out of stockon requestyou are here
  • Photo: 31308 A31308 AZ&S40 × 90 × 23available to order€9.63Request a quote
02

Details

what this bearing is, questions

About the bearing

d×D×Tsize 40 × 90 × 25.25mm
mweight 0.72kg

Tapered roller bearing 31308. Under GOST the same bearing is designated 27308.

M: FAG data. Another brand publishes its own figures, so compare them against that brand’s catalogue.

Frequently asked questions

What is 27308?

It is the same bearing under GOST 3189-89: 27308 corresponds to the ISO base 31308. Size 40 × 90 × 25.25 mm, a full equivalent of 31308.

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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