Step 6: Arm Mount
The rest of the arm will be mounted onto a small wood structure that the drill motor rotates.
From 3/4" plywood, cut two 2" x 6 1/4" strips, a 2" x 5 1/2" strip, and a 3" x 3 3/4" piece.
Cut a 1 1/2" x 3 3/4" piece of 7/8" thick wood for the base. In this piece, drill a hole in the center for the bolt that will be clamped into the drill chuck.
Drill three holes through the 3" x 3 3/4" piece and the 7/8" wood base side and secure with screws.
Drill three small holes near the top of the 3" x 3 3/4" piece for three eye hooks.
Drill two holes through each of the longer strips and into the base and front side.
Secure each side with two wood screws.
Drill two holes through the remaining piece on the top of the structure and through each of the side pieces. Secure with two screws.
From 3/4" plywood, cut two 2" x 6 1/4" strips, a 2" x 5 1/2" strip, and a 3" x 3 3/4" piece.
Cut a 1 1/2" x 3 3/4" piece of 7/8" thick wood for the base. In this piece, drill a hole in the center for the bolt that will be clamped into the drill chuck.
Drill three holes through the 3" x 3 3/4" piece and the 7/8" wood base side and secure with screws.
Drill three small holes near the top of the 3" x 3 3/4" piece for three eye hooks.
Drill two holes through each of the longer strips and into the base and front side.
Secure each side with two wood screws.
Drill two holes through the remaining piece on the top of the structure and through each of the side pieces. Secure with two screws.
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