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微型台钻

 渤海小鱼0728 2017-04-08

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pivot end turned down to .125" then parted off the original shaft slipped into hole, it will get fixed with some locktite.

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now it is parallel in the engaged position

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just need to make the locking carrier for the finger control end and a couple of stop collars at the pivot.

 

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Michaelthe quill control is now sorted and the thumb-wheel works a treat.

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and raised a little

 

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Next up another dial, which will have to wait until I head into town again.Greg Thanks you are too kind, But I have to admit looking at Gerald Wingrove's tooling was my inspiration. it still blows me away that he made all those machines design build in 9 weeks.

 

I couldn't wait to go to town so stole the 1/2 inch travel dial of my magnetic base.

 

 

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Since the quill doesn't really need to travel any further than that before adjusting the whole thing on the pillar anyway it seemed like a good idea.

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I found a reject toolmakers clamp part and butchered it some more to make a tab for the dial to mate against. I had an odd bit of aluminum that was already bored 1 inch with a set screw so substituted the steel one for a brass thumbscrew to make adjusting it easy.

 

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So now it is good to go .hanks everyone for the compliments.

 

Keith the large mill drill is out in the shop and the motor on it is 3/4 horse, as i mentioned the poor mans DRO is accomplished with three butchered dial vernier calipers.

The sensitivity is quite a way from the smaller drill inasmuch as the quill on the big mill drill is 3 inches in diameter and the handles are about 12 inches for a radius of 24. which means that when using it to drill tiny holes I need to be able to view the work through a magnifying visor while stretching my arm up to the handle to make very fine pecks at the surface.  I am comfortable doing a lot of work with the big mill drill.

 

The small drill is very quiet and I can get close without feeling like I am doing Yoga stretches to operate it when drilling. I guess the best analogy is the difference between cutting some brass with the jewelers saw versus the 20 in bandsaw, not that I don't use both for the appropriate tasks. I hope that I have clarified why I made this tool.

 

Today another tweak to smooth out the operation I flipped the quill dial over so that it read the proper direction when going down It look a bit tidier as well.

 

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 Also made a small keeper plate for the dial end of the x direction for the table so that the end of the dial does not get caught in the T slots

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