Drawing the Rear of the Keys

The next step is to draw in the rear of the keys. Using a speed square, draw lines from your marks on the rear edge of the key blank straight down to line NO. Blacken out the 17/32ā€ [13.4mm] space at the left of the blank, and the space after the last key on the right of the blank. Blacken out the area to the right of the highest ā€œDā€ key from line HI to line LM. These are waste areas which will eventually be cut out. Your key blank should look like the following illustration.