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Lathe Drill Holder Jig

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Project by socrbent posted 01-26-2019 05:33 PM 1946 views 5 times favorited 6 comments Add to Favorites Watch

Most often I make jigs to fill a need. This one was no exception. The 2 piece jig holds a drill parallel to center of lathe rotation on the tool rest. It allowed me to make several symetrical holes in a piggy bank I was turning for the feet, eyes, nostrils, ears, coin slot and tail. Mounting on tool rest allows easy movement in/out and laterally. The base piece in images 5 and 6 allow mounting on this tool rest which was choosen for the straight vertical sides and curve that gives the base support in several directions:

When the 1” thick base is slide down on this rest, it provides a solid smooth surface for the upper fixture to slide on.

I traced the shape of the rest on the pine scrap from milled down 2×6 and cut out on a band saw. It split in two as soon as I tested it on tool rest. So after sanding for a better fit, it was re-glued together and a maple strip was glued and screwed to split side (right of photo 4) so long grain in maple would prevent splitting again and provide a smooth surface to sliding on that side. Another maple strip slide was glued to 1/2 of opposite side allowing the base to be tightened to rest. A 4” screw was added across the gap (along left of photo 4) in such a way as to allow gap to be pulled close tightening the base to rest. You can see the access to the recessed screw on right of the photo above. So far the base fit is such that tightening has not been needed. Photo 5 shows a scrap of 1/8” ply wood added to top side of base with grain oriented in direction of sliding. Got a lot of tear out that doesn’t affect any thing but looks crappy. It is only glued to rear half of base to allow clamping base to rest. I first tried a 3/4” thick piece of mdf in stead of the 1/8” plywood but discovered it raised the jig above center even when tool rest was at its lowest point. The 1/8” piece allows the drill to be right on center:

I choose the Dewalt hammer drill because it was my newest drill and likely to be around for use on the jig for longer than an older drill. Also its metal body could be clamped without damage. It only needs a small amount of pressure on clamp to hold drill in place. Lastly the drills shape lends itself to the fixture (top and bottom are both parallel to axis of drilling. The 2 small maple shims make the drill parallel to base.
The upper fixture of mdf and pine scraps simply sits on top of base so that it can slide in toward center of lathe:

Contact areas between the base and upper fixture were waxed and buffed.

So far it worked just as I hoped and the base may be used for other purposes. Results:


Hope this may help others and I welcome comments/suggestions.

-- socrbent Ohio





6 comments so far

View Andybb's profile

Andybb

3243 posts in 1653 days


#1 posted 01-26-2019 05:38 PM

I sometimes get as much satisfaction making a well made working jig as I do some projects, especially the ones I dream up and design myself. Nice job!

-- Andy - Seattle USA

View ZAGREB's profile

ZAGREB

1276 posts in 2699 days


#2 posted 01-26-2019 05:47 PM

fantastic,thanks for sharing

-- bambi

View tyvekboy's profile

tyvekboy

2110 posts in 4063 days


#3 posted 01-26-2019 06:07 PM

Great jug. Innovative Jig.

-- Tyvekboy -- Marietta, GA ………….. one can never be too organized

View lew's profile

lew

13331 posts in 4805 days


#4 posted 01-26-2019 11:22 PM

That’s really neat! Thanks!!

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View swirt's profile

swirt

6102 posts in 4021 days


#5 posted 01-27-2019 02:50 AM

Clever idea.

-- Galootish log blog, http://www.timberframe-tools.com

View socrbent's profile

socrbent

1040 posts in 3319 days


#6 posted 01-27-2019 03:58 AM

Thanks guys. I appreciate your kind comments and was really happy when the jig worked as I wanted.

-- socrbent Ohio

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