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Drawing of 6406 ZZ: ⌀30 × ⌀90 × 23 mm6406 ZZZZ
Fig. 1: 6406 ZZ, 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 6406 ZZ

Load: radial medium; axial low, on both sidesDeep groove ball

Bearing Koyo 6406 ZZ

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Specifications

Manufacturer number
ISO designation
GOST number
Equivalents
4 exact, 15 approximate
d
30 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
Seal
ZZshields, both sides
Clearance
normal clearance
C
54.2 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
23.9 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
m
0.735 kg
MassWeight of the product. Source: supplier data
01

Equivalents

the same size 30 × 90 × 23 from other brands

19 products
Series illustration (not a photo of this item): 6406 ZZ
You are viewingKoyo 6406 ZZ

Everything the number specifies matches: series 64, 30 × 90 × 23 mm, metal shields on both sides, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the Koyo catalogue.
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Details

what this bearing is, questions

About the bearing

D 90d 30B 23
d×D×Bsize 30 × 90 × 23mm
Cdynamic 54.2kN
C0static 23.9kN
mweight 0.735kg

Deep groove ball bearing 6406-ZZ, design ZZ: metal shields on both sides. Under GOST the same bearing is designated 80406.

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

Frequently asked questions

How does 2RS differ from ZZ?

2RS has rubber seals that touch the inner ring and keep out dust and water better, which is the usual choice for field machinery. ZZ has metal shields that do not touch, allow higher speeds, and protect against dirt less well.

What is 80406?

It is the same bearing under GOST 3189-89: 8 — metal shields on both sides, 0406 corresponds to the ISO base 6406. Size 30 × 90 × 23 mm, a full equivalent of 6406-ZZ.

Will 6406 ZZ C3 fit instead?

Same size, clearance greater than normal. C3 is used where the bearing runs hot or sits on the shaft with an interference fit. If the old bearing is not marked C3, take this one.

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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