• Simple, versatile and robust design
  • Low friction
  • High-speed capability
  • Accommodate radial and axial loads in both directions
  • Require little maintenance

Description

Deep groove ball bearing

Single row deep groove ball bearings are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types.

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Dimensions - 6308

Dimensions

d
40 mm
Bore diameter
tΔdmp -0.01  –  0 mm Deviation limits of mid-range bore diameter
D
90 mm
Outside diameter
tΔDmp -0.013  –  0 mm Deviation limits of mid-range outside diameter
B
23 mm
Width
tΔBs -0.06  –  0 mm Deviation limits of ring width
d1
56.11 mm
Shoulder diameter
D2
77.7 mm
Recess diameter
r1,2
min. 1.5 mm
Chamfer dimension
P6 and tighter width tolerance
ISO tolerance class for dimensions
Abutment dimensions - 6308

Abutment dimensions

da
min. 49 mm
Diameter of shaft abutment
Da
max. 81 mm
Diameter of housing abutment
ra
max. 1.5 mm
Radius of shaft or housing fillet

Calculation data

Basic dynamic load rating C
42.3 kN
Basic static load rating C0
24 kN
Fatigue load limit Pu
1.02 kN
Reference speed
17 000 r/min
Limiting speed
11 000 r/min
Minimum load factor kr
0.03
Calculation factor f0
13.2

Tolerances of run-out

Range of section height at inner ring of assembled bearing tKia
10 µm
Range of section height at outer ring of assembled bearing tKea
18 µm
ISO tolerance class for geometrical tolerances
P6
Dimensions - 6308

Dimensions

d
1.5748 in
Bore diameter
tΔdmp -10  –  0 µm Deviation limits of mid-range bore diameter
D
3.5433 in
Outside diameter
tΔDmp -13  –  0 µm Deviation limits of mid-range outside diameter
B
0.9055 in
Width
tΔBs -60  –  0 µm Deviation limits of ring width
d1
2.2091 in
Shoulder diameter
D2
3.0591 in
Recess diameter
r1,2
min. 0.0591 in
Chamfer dimension
P6 and tighter width tolerance
ISO tolerance class for dimensions
Abutment dimensions - 6308

Abutment dimensions

da
min. 1.9291 in
Diameter of shaft abutment
Da
max. 3.189 in
Diameter of housing abutment
ra
max. 0.0591 in
Radius of shaft or housing fillet

Calculation data

Basic dynamic load rating C
9 509 lbf
Basic static load rating C0
5 395 lbf
Fatigue load limit Pu
229 lbf
Reference speed
17 000 r/min
Limiting speed
11 000 r/min
Minimum load factor kr
0.03
Calculation factor f0
13.2

Tolerances of run-out

Range of section height at inner ring of assembled bearing tKia
10 µm
Range of section height at outer ring of assembled bearing tKea
18 µm
ISO tolerance class for geometrical tolerances
P6