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Simplified drawing of the bearing per ISO 8826-1, dimensions of 6304 2RS NR: ⌀20 × ⌀52 × 15 mm⌀52⌀20156304 2RS NR2RS
Fig. 1: 6304 2RS NR, simplified drawing per ISO 8826-1. Dimensions in mm
Bearing KOYO 6304 2RS NR — photo 1
Bearing KOYO 6304 2RS NR — photo 2
Bearing KOYO 6304 2RS NR — photo 3
Load: radial medium; axial low, on both sidesDeep groove ball

Bearing KOYO 6304 2RS NR

€12.91per piece
Available to orderThe manager confirms the lead time
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Specifications

Manufacturer number
ISO designation
GOST number
Equivalents
2 exact, 51 approximate
d
20 mm
Bore diameter dBearing bore = shaft diameter. Source: two supplier sources
D
52 mm
Outside diameter DOutside diameter = housing bore. Source: two supplier sources
B
15 mm
Width BRing width. Source: two supplier sources
Seal
2RSrubber, both sides
Clearance
normal clearance
m
0.14 kg
MassWeight of the product. Source: supplier data
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Equivalents

the same size 20 × 52 × 15 from other brands

53 products
Photo: 6304 2RS NR
You are viewingKoyo 6304 2RS NR
€12.91baseline for the price comparison

Everything the number specifies matches: series 63, 20 × 52 × 15 mm, contact seals on both sides, NR, normal clearance, special design. The codes in the number are read against the Koyo catalogue.

  • Photo: 6304 2RS NR6304 2RS NRThis bearingKoyo20 × 52 × 15available to order€12.91you are here
  • Series illustration (not a photo of this item): 6304 DDUNR6304 DDUNRNSK20 × 52 × 15available to orderon requestRequest a quote

Under the price: the difference from the price of this bearing (€12.91).
02

Details

what this bearing is, questions

About the bearing

D 52d 20B 15
d×D×Bsize 20 × 52 × 15mm
mweight 0.14kg

Deep groove ball bearing 6304-2RS, design 2RS: contact seals on both sides. Under GOST the same bearing is designated 180304.

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 180304?

It is the same bearing under GOST 3189-89: 18 — contact seals on both sides, 0304 corresponds to the ISO base 6304. Size 20 × 52 × 15 mm, a full equivalent of 6304-2RS.

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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