Page 74 - Rollingbearings

Suitability of rolling bearings for industrial applications

Suitability of rolling bearings for industrial applications

Symbols Load carrying capability Misalignment
+++ excellent ↔ double direction
++ good ← single direction
+ fair ◻ non-locating displacement on the seat
- poor ◾ non-locating displacement within the bearing
– – unsuitable ✓ yes
✗ no Static misalignment Dynamic misalignment (few tenths of a degree)
Radial load Axial load Moment load

Bearing type

Deep groove ball bearings + + ↔ A –, B + – – –
A B
Insert bearings + + ↔ – – ++ – –
A B C
Angular contact ball bearings, single row + 1) ++ ← – – – – –
A, B ++ A, B ++ ↔ A ++, B + A, C – –,
matched single row – –
A B C C ++ 1) C ++ ← C – – B –
double row ++ ++ ↔ ++ – – – –
A B
four-point contact + 1) ++ ↔ – – – – – –

Self-aligning ball bearings A B ++ – – – – +++ + 2)
+
–
Bearing type and arrangement Needle roller bearings, with steel rings A A A A B B B B C C D C D +++ A – –, B + ← – – A, B – – –
Cylindrical roller bearings, with cage
– –
–
– –
A, B + ←
++
–
C, D + ↔
+ ←
–
– –
full complement, single row
– –
full complement, double row
– –
–
– –
+++
C + ↔
++
– –
– –
– –
C ++
–
assemblies / drawn cups
C –
A –, B +
– –
combined bearings A A B B C C ++ A, B – – – – – – – –
– –
++
C ++
B.2
Tapered roller bearings, single row +++ 1) ++ ← – – – – –
A, B +++ A, B ++ ↔ A +, B ++ A –
matched single row – –
A B C C +++ 1) C ++ ← C – – B, C – –
A +
double row +++ ++ ↔ A –, B – – – –
A B B ++
Spherical roller bearings +++ + ↔ – – +++ + 2)
CARB toroidal roller bearings, with cage +++ – – – ++ –
full complement +++ – – – ++ –
A + ←
Thrust ball bearings – – – – – – – –
A B B + ↔
A + ←
with sphered housing washer – – – – ++ – –
A B B + ↔
Cylindrical roller thrust bearings – – ++ ← – – – – – –
Needle roller thrust beairngs – – ++ ← – – – – – –
Spherical roller thrust bearings + 1) +++ ← – – +++ + 2)
1) Provided the F a /F r ratio requirement is met 2) Reduced misalignment angle – contact SKF 3) Depending on cage and axial load level
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