Processes

By leveraging the combined experience of our parent company in Japan with our own two decades of automatic transmission shaft manufacturing at BPT, we are able to provide unparalleled levels of innovation and satisfaction to our customers.

RECEIVE RAW MATERIAL

COLD FORGING

NORMALIZING

LATHING

ROLLING

DRILLING

CARBURIZING

GRINDING

ASSEMBLY

DELIVERY

Cold Forging

Cold Forging is the keystone of BPT's manufacturing process. This technology enables BPT to quickly forge shafts with a high degree of accuracy at a low cost. Raw coil steel is shaped by the automated, progressive forging process to create the basic shape of the transmission shaft that will be precision machined into the final product.

Heat Treatment

BPT provides their own Heat Treatment processes to ensure a high level of quality and durability while minimizing costs. This process is divided into two areas: Normalizing, responsible for relieving the stress introduced during the cold forge process and improving the steel's mechanical properties in preparation for machining, and Carburizing, responsible for hardening the machined shafts before the final stages of production.

Machining

Machining begins at the Lathing process. Lathing is a multi-stage process using several NC machines to provide rough and finish cuts to the normalized shaft. The shafts proceed to the Rolling Process where splines and threads are formed. Next, the Drilling processes add holes and pathways for lubrication and hydraulic pressure before returning to our Heat Treatment area for Carburizing.

Once carburized, the hardened shafts are sent through the final production stages. Our NC grinding machines are able to create the final surfaces of the shaft with micron-precise tolerances. Internal components are then assembled into the part and the finished transmission shafts are inspected to ensure BPT's standard of excellence is met prior to preparation for delivery to the customer.