3 Attachment(s)
Keys for Perreymond Brevete
Almost finished with these keys. I knew they would be difficult, and I surely wasn't disappointed. The smallest is about 2-1/2" and 5" on the big one. Each key was made from a single piece of steel. The large key started out as a 7" x 2-1/2" X 3/4" chunk. To hold the steel in the lathe between centers, extra length was needed at both ends. So the steel was laid out with dye and center drilled at each end. Also drilled for the pin. Next step was cutting out much of the excess with the band saw and some chain drilling. At each end enough was cut off to fit on a lathe dog. Now set up on the lathe, the turning can be and should be completed. The extra length at the bit end should also be turned down round to the same diameter as the shaft. This helps to properly establish the round area under the bit that is filed down by hand.