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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.
Hagati
A day
Amabwiriza
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.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'Igiti Gikomeye1 igice
Imisumari y'ibiti1 igiceIbikoresho bikenewe:
Umucumita w'Intoki
Ivuvuzo ry'ukuboko rifite umutwe
Inyundo3
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.
Ibikoresho by'iyi ntambwe:
Ivuvuzo ry'ukuboko rifite umutwe1 igice
Umurongo uziguye w'icyuma cyoroheje1 igice
Umuheha w'umuringa1 igiceIbikoresho bikenewe:
Umucumita w'Ibyuma
Amakariso (Ikariso ry'Intoki)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.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'Igiti Gikomeye1 igice
Umurongo ugororotse w'icyuma cyoroshye1 igiceIbikoresho bikenewe:
Umucumita w'Intoki5
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.
Ibikoresho by'iyi ntambwe:
Icyegeranyo cy'inyuzi z'impande esheshatu1 igice
Umupira w'Impande Esheshatu1 igiceIbikoresho bikenewe:
Ibyuma byo kubaza6
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.
Ibikoresho
8- 1 igiceUmwanya
- 1 igiceUmwanya
- Umwanya
- Umwanya
- 1 igiceUmwanya
- Umwanya
- Umwanya
- 1 igiceUmwanya
Ibikoresho bikenewe
6- Umwanya
- Umwanya
- Umwanya
- Umwanya
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