Radial Internal Play
C4 Internal Play (Higher than C3)
Precision
Standard Precision
Heat Stabilization
No Heat Stabilization - Temperatures up to 120 °C
Suffix description
BIR3Special Bearing, Inner Ring Raceway Crowned
AThe Significance Of This Sign Is Not Determined Separately. They Are In Need For Appointment Of Special Features Of The Construction Of Internal Form External Uses. In General, The Use These Only Temporarily, During A Transitional Time To Avoid Confusion. In Some Cases, They Also For Permanent Appointment Of Bearings And Parts Of The Same Type And Size, But With A Differ Interior Design. (Source: Ina-Catalogue No. 307)
C4Bearing Internal Clearance Greater Than C3
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