Bore
K - 1:12 Tapered Bore (Standard for Most Types)
Seal
No Seal
Cage Type
S - Steel or Standard Cage
Radial Internal Play
C4 Internal Play (Higher than C3)
Precision
Standard Precision
Lubrication
Standard Lubrication
Heat Stabilization
No Heat Stabilization - Temperatures up to 120 °C
Suffix description
KTapered Bore, Taper 1:12
C4Bearing Internal Clearance Greater Than C3
Product description
The 1218K/C4 SKF belongs to the group of double-row self-aligning deep-groove ball bearings. This bearing type without a seal is a double-row bearing. Both rows are housed in a spherical raceway in the outer ring. This construction allows the bearing to be self-aligning. This means that any misalignment of the shaft relative to the bearing housing does not adversely affect performance.
These features make the 1218K/C4 SKF highly suitable for applications where substantial misalignment or shaft deflections may occur. Also, self-aligning bearings have the lowest friction of all rolling-element bearings. Even at higher speeds, there is only limited frictional heat. These bearings are capable of handling high radial loads. To a lesser extent, they can be axially loaded in both directions.
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