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Drawing of 2304 MC3: ⌀20 × ⌀52 × 21 mm⌀52⌀20212304 MC3
Fig. 1: 2304 MC3, 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 2304 MC3

Load: radial medium; axial low, on both sidesSelf-aligning ball

Bearing NSK 2304 MC3

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Specifications

Manufacturer number
ISO designation
GOST number
Equivalents
1 exact, 3 approximate
d
20 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
52 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
21 mm
Width BRing width. Source: supplier data
Seal
open, no protection
Clearance
MC3
01

Equivalents

the same size 20 × 52 × 21 from other brands

4 products
Series illustration (not a photo of this item): 2304 MC3
You are viewingNSK 2304 MC3

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

  • Series illustration (not a photo of this item): 2304 2RS2304 2RScontact seals on both sides, normal clearanceCT20 × 52 × 2154 pcs€2.75Request a quote
  • Series illustration (not a photo of this item): 2304 2RS2304 2RScontact seals on both sides, normal clearanceno brand20 × 52 × 21available to orderon requestRequest a quote
  • Cross-section drawing to size: Self-aligning ball, 20 × 52 × 21 mm2304 2RS ETN9contact seals on both sides, normal clearance, E, TN9ISB20 × 52 × 21available to orderon requestRequest a quote
02

Details

what this bearing is, questions

About the bearing

d×D×Bsize 20 × 52 × 21mm

Self-aligning ball bearing 2304. Under GOST the same bearing is designated 1604.

Frequently asked questions

What is 1604?

It is the same bearing under GOST 3189-89: 1604 corresponds to the ISO base 2304. Size 20 × 52 × 21 mm, a full equivalent of 2304.

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.

03

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