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1204 EKTN9

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1204 EKTN9

Self-aligning ball bearing with tapered bore
Self-aligning ball bearings, with a tapered bore, have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. They are insensitive to angular misalignment of the shaft relative to the housing, which can be caused, for example, by shaft deflection. The tapered bore facilitates ease of mounting via adapter sleeves or withdrawal sleeves.

  • Ease of mounting via adapter sleeves or withdrawal sleeves
  • Accommodate static and dynamic misalignment
  • Excellent high-speed performance
  • Excellent light load performance
  • Low friction

Description

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Bore type

Tapered 1:12

Dimensions - 1204 EKTN9

Dimensions

d

20 mm

Bore diameter
D

47 mm

Outside diameter
B

14 mm

Width
d1

≈ 28.88 mm

Shoulder diameter inner ring
D1

≈ 40 mm

Shoulder diameter outer ring
r1,2

min. 1 mm

Chamfer dimension

Abutment dimensions - 1204 EKTN9

Abutment dimensions

Da

max. 41.4 mm

Abutment diameter housing
ra

max. 1 mm

Fillet radius

Calculation data

Basic dynamic load ratingC

12.7 kN

Basic static load ratingC0

3.4 kN

Fatigue load limitPu

0.176 kN

Reference speed

32 000 r/min

Limiting speed

20 000 r/min

Permissible angular misalignmentα

2.5 °

Calculation factorkr

0.04

Limiting valuee

0.3

Calculation factorY0

2.2

Calculation factorY1

2.1

Calculation factorY2

3.3

Mass

Mass bearing

0.12 kg

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