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Drawing of 3309 A: ⌀45 × ⌀100 × 39.7 mm⌀100⌀4539.73309 A
Fig. 1: 3309 A, 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 3309 A

Combined load at an angle (angular contact), axial on one sideAngular contact ball

Bearing SKF 3309 A

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Specifications

Manufacturer number
Equivalents
1 exact, 8 approximate
d
45 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
100 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
39.7 mm
Width BRing width. Source: supplier data
Seal
open, no protection
C
75 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
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Equivalents

the same size 45 × 100 × 39.7 from other brands

9 products
Cross-section drawing to size: Angular contact ball, 45 × 100 × 39.7 mm
You are viewingSKF 3309 A

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

  • Series illustration (not a photo of this item): 3309 2RS3309 2RScontact seals on both sides, standard designCT45 × 100 × 39.720 pcs€7.17Request a quote
  • Type diagram, no dimensions: ball3309 BD-XL-2HRS-TVH-C3contact seals on both sides, clearance C3, TVH, XL, BD: not decodedFAG45 × 100 × ?available to orderon requestRequest a quote
  • Cross-section drawing to size: Angular contact ball, 45 × 100 × 39.7 mm3309B-2RSRTNGC3contact seals on both sides, clearance C3, B, TNGNEUWEG45 × 100 × 39.7available to orderon requestRequest a quote
  • Type diagram, no dimensions: ball3309B-2RSRTNGC3 N AR3N5contact seals on both sides, clearance C3, 5, A, B, TNG, groove for a snap ring, R3: not decodedNSK45 × 100 × ?available to orderon requestRequest a quote
  • Cross-section drawing to size: Angular contact ball, 45 × 100 × 39.7 mm3309 A-2RS1/MT33contact seals on both sides, A, MT33SKF45 × 100 × 39.7available to orderon requestRequest a quote
  • Photo: 3309 2RS3309 2RScontact seals on both sides, standard designZ&S45 × 100 × 39.7out of stockon requestRequest a quote
  • Cross-section drawing to size: Angular contact ball, 45 × 100 × 39.7 mm3309J N 55, J, groove for a snap ringNSK45 × 100 × 39.7available to orderon requestRequest a quote
  • Cross-section drawing to size: Angular contact ball, 45 × 100 × 39.7 mm3309 A/C3clearance C3SKF45 × 100 × 39.7available to orderon requestRequest a quote
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Details

what this bearing is, questions

About the bearing

D 100d 45B 39.7
d×D×Bsize 45 × 100 × 39.7mm
Cdynamic 75kN

Angular contact ball bearing 3309 A.

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

Frequently asked questions

Will 3309 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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