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Hand-Crank Drill Press in a Wooden Frame, with a Screw-Fed Table (Boy Mechanic, 1915)
A cheap drill press for iron and brass: the chuck of an old carpenter's brace on a cranked shaft running in a brass bearing through one post of a wooden frame, and a sliding table pushed up against the drill by a 1/2 in bolt through the opposite post.
Intermediate
A day
Instructions
1
1
Read the Boy Mechanic
Read the Boy Mechanic
"A broken carpenter's brace furnished the chuck, which was fastened to a 1/2-in. shaft having a detachable crank."
2
2
Build the frame
Build the frame
Make a frame of two end posts about 3 in wide joined by side rails about 1 in by 2 in, as in the drawing. Bore a hole for the chuck shaft through one post and for the feed bolt through the other, on one line and exactly central.
Materials for this step:
Hardwood Board1 piece
Wood Screws1 pieceTools needed:
Hand Saw
Brace and Bit
Hammer3
3
Fit the chuck shaft
Fit the chuck shaft
Press a brass tube tightly into the hole in the first post as a bearing. Fasten the chuck from a broken brace to a 1/2 in shaft running in the tube, with a detachable crank on the outer end.
Materials for this step:
Brace and Bit1 piece
Mild Steel Round Bar1 piece
Brass Tube1 pieceTools needed:
Hacksaw
Files (Hand File)4
4
Make the sliding table
Make the sliding table
Make the table from a post like the end posts with guides that keep it in line between the rails. Fix a plate on its underside where the bolt bears.
Materials for this step:
Hardwood Board1 piece
Mild Steel Flat Bar1 pieceTools needed:
Hand Saw5
5
Fit the feed screw
Fit the feed screw
Fasten a square nut in the opposite post and run a 1/2 in machine bolt through it to push the table up against the drill. A crank can be fitted to the bolt.
Materials for this step:
Hex Bolt Assortment1 piece
Hex Nut1 pieceTools needed:
Chisels6
6
Troubleshooting
Troubleshooting
Hand drill press troubleshooting.
Flow
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7
7
History and honest limits
History and honest limits
From **The Boy Mechanic, Book 2** (Popular Mechanics, 1915), p. 242, by L. R. Kelley (checked on the archive.org scan boymechanicbook200chic2). Only the shaft, bolt and drawing sizes are his; the wood and fixings are ours.
Materials
8- 1 piecePlaceholder
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