With all the numbers recorded the rotors take a trip over to the lathe to get the shaft cut down to the correct length, which is part of the pre-build. Final assembly is done only after everything has been checked and rechecked. |
The rotor is measured to double check the lathe work. |
Again the supercharger is pre-assembled and clearances are rechecked. One of the rotors has another appointment with the lathe. |
This time the lathe trims a hair off the body of the rotor to achieve the correct clearance in the supercharger assembly. |
The truing of rotors takes place at its own station. The rotor shafts are cleaned and deburred with any damage repaired. A lot of the work that hits this bench comes in from eBay or swap meet purchases. |
Balancing holes are chamfered. |
On the fourth pre-assembly everything checks out. The smallest of movement of the bearing plates allows thousandths clearance changes along the length and ends of the rotors. |
BDS does not use any shims in assembly. The shimless process takes longer, but adds to the overall longevity and performance of the supercharger assembly. As shims wear tolerances change. These shims came out of a customer core rebuild. |
The smaller dowel pins are removed. The supercharger takes a trip over to the drill press. |
The positioning holes are drilled out for insertion of the larger and final dowel pins. The larger dowel pins lock in all the tolerances. |
