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Drawing of 6904 ZZE: ⌀20 × ⌀37 × 9 mm6904 ZZEZZE
Fig. 1: 6904 ZZE, end view and section; rolling element geometry per the NSK catalogue. Dimensions in mm

There is no photo of this product: the drawing shows the dimensions of 6904 ZZE

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

Bearing NACHI 6904 ZZE

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Specifications

Manufacturer number
ISO designation
Equivalents
4 exact, 17 approximate
d
20 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
37 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
9 mm
Width BRing width. Source: supplier data
Seal
ZZEmetal shields on both sides
Clearance
normal clearance
C
6.35 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
3.7 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
m
0.036 kg
MassWeight of the product. Source: supplier data
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Equivalents

the same size 20 × 37 × 9 from other brands

21 products
Series illustration (not a photo of this item): 6904 ZZE
You are viewingNACHI 6904 ZZE

Everything the number specifies matches: series 69, 20 × 37 × 9 mm, metal shields on both sides, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the NACHI catalogue.
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Details

what this bearing is, questions

About the bearing

D 37d 20B 9
d×D×Bsize 20 × 37 × 9mm
Cdynamic 6.35kN
C0static 3.7kN
mweight 0.036kg

Deep groove ball bearing 6904-ZZ, design ZZE: metal shields on both sides.

C, C₀, m: NACHI 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.

Will 6904 ZZE 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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