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308-2ZNR

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308-2ZNR

Deep groove ball bearing with filling slots and integral sealing
Single row deep groove ball bearings with filling slots, a snap ring, and shields on one or both sides, accommodate more balls than standard deep groove ball bearings. They are of a simple, yet versatile, design and are robust in operation, requiring little maintenance. They can accommodate radial and axial loads in both directions. They have a higher radial load carrying capacity than the corresponding bearings without filling slots but have a limited axial load carrying capacity due to the filling slots. The snap ring, fitted in an annular groove in the outer ring, facilitates axial location of the bearings within their housings. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.

  • Snap ring facilitates axial location within housing
  • Integral sealing prolongs bearing service life
  • Simple, versatile and robust design
  • Accommodate higher radial loads than corresponding bearings without filling slots, with limited axial loads in both directions
  • Require little maintenance

Description

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Dimensions - 308-2ZNR

Dimensions

d

40 mm

Bore diameter
D

90 mm

Outside diameter
B

23 mm

Width
d1

≈ 56.11 mm

Shoulder diameter
D2

≈ 77.7 mm

Recess diameter
D3

86.79 mm

Diameter of snap ring groove
D4

96.5 mm

Outside diameter of snap ring
b

2.7 mm

Width of snap ring groove
C

3.28 mm

Distance outer ring from side face to snap ring groove
f

2.46 mm

Width of snap ring
r0

max. 0.6 mm

Bottom radius of snap ring groove
r1,2

min. 1.5 mm

Chamfer dimension

Abutment dimensions - 308-2ZNR

Abutment dimensions

da

min. 49 mm

Diameter of shaft abutment
da

max. 56 mm

Diameter of shaft abutment
Da

max. 81 mm

Diameter of housing abutment
Db

min. 98 mm

Diameter of snap ring recess in the housing
ba

min. 3 mm

Width of snap ring recess in the housing
Ca

max. 5.74 mm

Distance from outer ring side face to snap ring back face
ra

max. 1.5 mm

Radius of shaft or housing fillet

Calculation data

Basic dynamic load ratingC

45.7 kN

Basic static load ratingC0

36 kN

Fatigue load limitPu

1.53 kN

Reference speed

14 000 r/min

Limiting speed

6 800 r/min

Minimum load factorkr

0.05

Mass

Mass bearing

0.64 kg

Included products

Snap ring

SP 90

Tolerance class

Dimensional tolerances

Normal

Radial run-out

Normal

recently added Bearing

Title

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