Author Topic: Quick Toolpost Drill/grinder  (Read 9251 times)

Offline vtsteam

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Quick Toolpost Drill/grinder
« on: December 29, 2014, 07:24:22 PM »
I know I wrote a long time ago about truing up my 3 jaw chuck jaws with a Dremel mounted on the toolpost, but don't think I wrote about this simple other project here.

I needed to drill some evenly spaced mounting holes in a small engine head without removing it fro the chuck on the lathe, and i don't have a rotary table to fit it for the mill. Lots of ways to do this anyway, of course, but i wanted to try something right on the lathe with a flexible shaft tool I bought a long time ago. So here's a really quick little project I tried that worked out well.

First I cut a chunk of scrap aluminum into a piece small enough to make one of my round tool post type quick change tool holders:

« Last Edit: December 29, 2014, 07:48:30 PM by vtsteam »
I love it when a Plan B comes together!
Steve
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Offline vtsteam

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Re: Quick Toolpost Drill and Grinder
« Reply #1 on: December 29, 2014, 07:30:12 PM »
I trued it up on the mill, and then drilled a hole to accept a mounting bolt, to attach it to the Craftsman 12" lathe's cross slide. I also drilled a hole that would be a close fit on the handpiece of the flexible shaft tool. Actually, two different size holes from each side that met and formed a step -- the handpiece is tapered, and this provided a good grip at several points.

I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline vtsteam

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Re: Quick Toolpost Drill and Grinder
« Reply #2 on: December 29, 2014, 07:32:37 PM »
Here I'm checking the fit of the handpiece in the tool holder block:

I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline vtsteam

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Re: Quick Toolpost Drill and Grinder
« Reply #3 on: December 29, 2014, 07:37:24 PM »
A slit in the block clamps the handpiece further when the mounting bolt is tightened. Here I'm trying it out, drilling the model engine head. The raw stock is still in the chuck, and the head hasn't yet been parted off. The carriage was retracted to the needed diameter for the hole circle.

The bull gear in the lathe headstock serves as a dividing fixture on the craftsman. there is a pin plunger and holes drilled in the back of the gear:

I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline vtsteam

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Re: Quick Toolpost Drill and Grinder
« Reply #4 on: December 29, 2014, 07:43:53 PM »
And the finished head, parted off. This is a bash valve head for a model steam engine. All machining was done at one go -- without removing the raw stock from the chuck.

I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline SwarfnStuff

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Re: Quick Toolpost Drill/grinder
« Reply #5 on: December 30, 2014, 02:13:58 AM »
Specially good as you didn't have to mess with truing it up again. Almost impossible in the 3 jaw IMHO. Neat solution.
John B
Converting good metal into swarf sometimes ending up with something useful. ;-)

Offline steampunkpete

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Re: Quick Toolpost Drill/grinder
« Reply #6 on: December 30, 2014, 03:03:23 AM »
I've been mulling over a toolpost grinder / drill using this little beauty from ebay:

http://www.ebay.co.uk/itm/380728862616?_trksid=p2060778.m1438.l2648&ssPageName=STRK%3AMEBIDX%3AIT

Has anybody else tried it?

Offline krv3000

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Re: Quick Toolpost Drill/grinder
« Reply #7 on: December 30, 2014, 05:25:52 PM »
yep i have the makings just need the time to do it

Offline Fergus OMore

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Re: Quick Toolpost Drill/grinder
« Reply #8 on: December 30, 2014, 06:10:46 PM »
I made one up years ago. I bought a Bosch POF 45 or 50 router to do some woodworking. In what passed for instructionsm it had been a tool post grinder. All that was done was to remove the router table bit and make a 43mm collar to fit on the saddle at centre height. Mine is still lying about-somewhere.

If I want summat really suitable the spindle from Quorn or the Kennet or the Stent tool and cutter grinders fit on the saddle of my Myford. My only real gripe really is grit.



Happy New Year

Norman

Offline Meldonmech

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Re: Quick Toolpost Drill/grinder
« Reply #9 on: December 31, 2014, 04:40:36 AM »


       I have one of these flexible drives, offers a cheap and easy method of drilling in the lathe. Must give it a try.

                                                                  Cheers David

Offline Fergus OMore

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Re: Quick Toolpost Drill/grinder
« Reply #10 on: December 31, 2014, 04:57:42 AM »


       I have one of these flexible drives, offers a cheap and easy method of drilling in the lathe. Must give it a try.

                                                                  Cheers David

This 43mm collar thing is standard on many drills as well as routers

Norman

Offline drmico60

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Re: Quick Toolpost Drill/grinder
« Reply #11 on: December 31, 2014, 06:56:06 AM »
I made a toolpost drill using a flexible drive shaft. Full details here: http://mikesworkshop.weebly.com/toolpost-drill.html

Offline vtsteam

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Re: Quick Toolpost Drill/grinder
« Reply #12 on: December 31, 2014, 08:47:08 AM »
I made a toolpost drill using a flexible drive shaft. Full details here: http://mikesworkshop.weebly.com/toolpost-drill.html

Very nice! :clap:
I love it when a Plan B comes together!
Steve
www.sredmond.com