| C |
60° Contact Angle |
| A |
As A Second Letter After The Contact Angle Information (for BTW Series Only): Bearing With A Larger Bore To To Be Mounted On The Large Diameter Side Of A Cylindrical Roller Bearing With A Tapered Bore |
| TN9 |
Injection Moulded Cage Of Glass Fibre Reinforced Polyamide 6,6, Rolling Element Centred |
| UP |
Special Tolerance Class For Machine Tool Spindle Bearings; Dimensional Accuracy Approximately To ISO Tolerance Class 4 And Running Accuracy Better Than ISO Class 4 |
| W33 |
Lubrication Groove And Three Holes In Bearing Outer Ring |
