MB=Machined Brass Cage, Inner Ring Centred. KR=Tapered Bore. E44=Outer Ring With Machined Lubrication Groove And Holes (Double Row Only). P4=Dimensional & Running Accuracy To ISO Tolerance Class 4 (More Accurate Than P5)-Abec.7.
Inner (d) Inch
Outer (D) Inch
Width (B) Inch
Description from Medias
Manufacturer Part Number (MPN)
NN3012MB KRE44 P4
Bore
K - 1:12 Tapered Bore (Standard for Most Types)
Seal
No Seal
Cage Type
M - Brass Cage
External Modification
No External Modification
Radial Internal Play
Cn Normal Internal
Precision
P4 Precision (Higher than P5)
Heat Stabilization
Special Treatment
No Heat Stabilization - Temperatures up to 120°C