The Craftmans Shop > New from Old

Po' man's mag drill

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DICKEYBIRD:


I'm having to drill & tap a ton of holes on my new CNC project. I don’t have a mag drill so I cobbled up this rig to ensure that the holes are all nice & straight.

 A friend let me borrow his lever-assist safe drilling gizmo but in use it doesn't guarantee that the hole is perpendicular to the work.  I made up a guide stand for it by modifying an old British Leyland screw press I had squirreled away .  I modded it with some longer guide rods and 2 acetal bushed aluminum plates to attach to the drill.

He also let me have a 12V electromagnetic security door lock. I ordered another one from ebay for a total of (allegedly) 1200 lbs. clamping force. The E/M’s won’t be used to anchor the end of the lever, just to solidly clamp the base once the hole position is located.  They're wired in series for 24vdc.  A chain either wrapped around or bolted to the table at the far end of the lever allows applying as much pressure on the drill as needed. The length of lever is adjustable out to about 3 feet.

The drill spindle was buggered a bit from slippage so I milled 3 flats on it to stop that problem.    I included a pic of the wacky setup I used to mill the flats. Finally found a use for the clamped V-blocks I picked up a long time ago.

The pics show a large drill in it just for kicks; no way I'm drilling a hole that big in that nice blanchard-ground table top!  I didn't actually need the additional leverage of the safe drilling gizmo for these small holes but it's there when I need it.  I just aligned the drill over the punch mark, switched on the magnets, climbed up on a step stool & let my body weight work for me.

John Rudd:
Nice bit of lateral thinking there DB....   :thumbup:
Anything to get the job done..thanks for sharing. :dremel:

PekkaNF:
How it is drilling?

Once I had to lug small drill press near to 200*200 mm square pipe and clamp it down on it, because the poor drill table would have broken under the load of the three metre long pipe...not to mention my back.

Pekka

awemawson:
That's a good mod I reckon, but can I send you a bit of new cable for the drill before you kill yourself  :bugeye:

Mag drills are wonderful things  :thumbup:

Mine sits in a box most of the year, but came out to play on Wednesday drilling 64 holes in those farm signs I made - by modern standards it's huge and clunky but by heck it makes the job go so much better  :clap:

Pete W.:

--- Quote from: awemawson on March 10, 2017, 07:00:36 AM ---That's a good mod I reckon, but can I send you a bit of new cable for the drill before you kill yourself  :bugeye:

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I refrained from posting a couple of hours ago because I didn't want to come over as a smart a**e!  Well, no more than usual anyway!!

Andrew has posted words which combine friendliness, tact and concern with sound advice.  Take care, Dickeybird, we need you.

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