| National Precision Bearing p/n | Aurora Part Number |
| M81935/1-03 | ASM-3T |
| M81935/1-04 | ASM-4T |
| M81935/1-05 | ASM-5T |
| M81935/1-06 | ASM-6T |
| M81935/1-07 | ASM-7T |
| M81935/1-08 | ASM-8T |
| M81935/1-10 | ASM-10T |
| M81935/1-12 | ASM-12T |
| M81935/1-14 | ASM-14T |
| M81935/1-16 | ASM-16T |
| M81935/2-03 | ASW-3T |
| M81935/2-04 | ASW-4T |
| M81935/2-05 | ASW-5T |
| M81935/2-06 | ASW-6T |
| M81935/2-07 | ASW-7T |
| M81935/2-08 | ASW-8T |
| M81935/2-10 | ASW-10T |
| M81935/2-12 | ASW-12T |
| M81935/2-14 | ASW-14T |
| M81935/2-16 | ASW-16T |