Drawing of 30306 A: ⌀30 × ⌀72 × 20.75 mm⌀72⌀30B 19T 20.75C 16α30306 A
Fig. 1: 30306 A, end view and section; internal parts simplified per ISO 8826-1. Dimensions in mm
Bearing Z&S 30306 A — photo 1
Bearing Z&S 30306 A — photo 2
Bearing Z&S 30306 A — photo 3
Combined load at an angle (tapered, high), axial on one sideTapered roller

Bearing Z&S 30306 A

Price on request
Available to order

Specifications

Manufacturer number
ISO designation
GOST number
OEM number
30 KB 03, 575.37.160
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
16 mm
Cup width CWidth of the outer ring of a tapered roller bearing. Source: supplier data
C
56.1 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
56 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
Limiting speed
7,500 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

16 products
Photo: 30306 A
You are viewingZ&S 30306 A

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

  • Series illustration (not a photo of this item): 3030630306standard designCT30 × 72 × 192,605 pcs€1.76Request a quote
  • Series illustration (not a photo of this item): 3030630306standard designNTE30 × 72 × 19279 pcs€2.76Request a quote
  • Cross-section drawing to size: Tapered roller, 30 × 72 × T 20.75 mm31306standard designCT30 × 72 × ?available to order€2.72Request a quote
  • Photo: 3030630306standard designTIMKEN30 × 72 × 19available to order€18.63Request a quote
  • Photo: 31306 A31306 Adifferent series: 31306FAG30 × 72 × 19available to order€36.34Request a quote
  • Series illustration (not a photo of this item): 3030630306standard designno brand30 × 72 × 19available to orderon requestRequest a quote
  • Series illustration (not a photo of this item): 3030630306standard designKG30 × 72 × 19available to orderon requestRequest a quote
  • Cross-section drawing to size: Tapered roller, 30 × 72 × T 20.75 mmHR31306J 55, J, HR: not decodedNSK30 × 72 × ?available to orderon requestRequest a quote
  • Cross-section drawing to size: Tapered roller, 30 × 72 × T 20.75 mm31306standard designSKF30 × 72 × ?available to orderon requestRequest a quote
  • Photo: 31306 A31306 Adifferent series: 31306Z&S30 × 72 × 19out of stockon requestRequest a quote
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Details

what this bearing is, questions

About the bearing

d×D×Tsize 30 × 72 × 20.75mm
Cdynamic 56.1kN
C0static 56kN
mweight 0.39kg

Tapered roller bearing 30306. Under GOST the same bearing is designated 7306.

C, C₀, m and limiting speed 7,500 rpm: Z&S data. Another brand publishes its own figures, so compare them against that brand’s catalogue.

Frequently asked questions

What is 7306?

It is the same bearing under GOST 3189-89: 7306 corresponds to the ISO base 30306. Size 30 × 72 × 20.75 mm, a full equivalent of 30306.

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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