Drawing of 31306 A: ⌀30 × ⌀72 × 20.75 mm⌀72⌀30B 19T 20.75C 14α31306 A
Fig. 1: 31306 A, end view and section; internal parts simplified per ISO 8826-1. Dimensions in mm
Bearing Z&S 31306 A — photo 1
Bearing Z&S 31306 A — photo 2
Bearing Z&S 31306 A — photo 3
Combined load at an angle (tapered, high), axial on one sideTapered roller

Bearing Z&S 31306 A

Price on request
Available to order

Specifications

Manufacturer number
ISO designation
OEM number
30 KD 13
d
30 mm
Bore diameter dBearing bore = shaft diameter. Source: two supplier sources
D
72 mm
Outside diameter DOutside diameter = housing bore. Source: two supplier sources
B
19 mm
Width BRing width. Source: supplier data
T
20.75 mm
Total width TOverall width of an assembled tapered roller bearing. Source: two supplier sources
Cup width C
14 mm
Cup width CWidth of the outer ring of a tapered roller bearing. Source: supplier data
C
47.3 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
50 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
Limiting speed
6,700 rpm
Limiting speedMechanical limit; depends on the seal (SKF 6200: 36,000 open, 17,000 with 2RSH). Source: supplier data
m
0.39 kg
MassWeight of the product. Source: supplier data
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Equivalents

the same size 30 × 72 × 20.75 from other brands

15 products
Photo: 31306 A
You are viewingZ&S 31306 A

Everything the number specifies matches: series 313, 30 × 72 × 19 mm, special design. The codes in the number are read against the Z&S catalogue.

  • Photo: 31306 A31306 AThis bearingZ&S30 × 72 × 19out of stockon requestyou are here
  • Photo: 31306 A31306 AFAG30 × 72 × 19available to order€36.34Request a quote
02

Details

what this bearing is, questions

About the bearing

d×D×Tsize 30 × 72 × 20.75mm
Cdynamic 47.3kN
C0static 50kN
mweight 0.39kg

Tapered roller bearing 31306.

C, C₀, m and limiting speed 6,700 rpm: Z&S 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.

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