Drawing of 61808 2RS: ⌀40 × ⌀52 × 7 mm61808 2RS2RS
Fig. 1: 61808 2RS, 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 61808 2RS

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

Bearing CT 61808 2RS

Price on request
Available to order

Specifications

Manufacturer number
ISO designation
d
40 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
52 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
7 mm
Width BRing width. Source: supplier data
Seal
2RSrubber, both sides
Clearance
normal clearance
C
4.94 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
3.45 kN
Basic static load rating C0Permissible load without rotation and under shock; ISO 76 method, manufacturer’s figure. Source: supplier data
m
0.034 kg
MassWeight of the product. Source: supplier data
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Equivalents

the same size 40 × 52 × 7 from other brands

9 products
Series illustration (not a photo of this item): 61808 2RS
You are viewingCT 61808 2RS

Everything the number specifies matches: series 618, 40 × 52 × 7 mm, contact seals on both sides, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the CT catalogue.

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Details

what this bearing is, questions

About the bearing

D 52d 40B 7
d×D×Bsize 40 × 52 × 7mm
Cdynamic 4.94kN
C0static 3.45kN
mweight 0.034kg

Deep groove ball bearing 61808-2RS, design 2RS: contact seals on both sides.

C, C₀, m: CT 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.

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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