Mini to micro

Topics include, Machine Tools & Tooling, Precision Measuring, Materials and their Properties, Electrical discussions related to machine tools, setups, fixtures and jigs and other general discussion related to amateur machining.

Moderators: Harold_V, websterz, GlennW

Post Reply
Jose Rivera
Posts: 3803
Joined: Wed Feb 21, 2007 9:21 pm
Location: Vallejo California

Mini to micro

Post by Jose Rivera » Tue Oct 28, 2008 8:29 pm

I came across this site where one can find drills and end mills of very minute sizes.

I thought that it may be of interest to a few.

http://www.pmtnow.com/
There are no problems, only solutions.
--------------
Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa

User avatar
GlennW
Posts: 6969
Joined: Sun Apr 15, 2007 9:23 am
Location: Florida

Post by GlennW » Tue Oct 28, 2008 10:09 pm

I don't think your Dremel will work too well with that .0009" end mill :D

Pretty amazing stuff!!

User avatar
tmcd
Posts: 124
Joined: Tue Feb 19, 2008 9:57 pm
Location: Central Illinois USA

Re: Mini to micro

Post by tmcd » Tue Oct 28, 2008 10:34 pm

Jose Rivera wrote:I came across this site where one can find drills and end mills of very minute sizes.

I thought that it may be of interest to a few.

http://www.pmtnow.com/
Interesting. If you need something like that the prices don't really seem too bad either.

Tim

Jose Rivera
Posts: 3803
Joined: Wed Feb 21, 2007 9:21 pm
Location: Vallejo California

Hummingbird

Post by Jose Rivera » Tue Oct 28, 2008 10:49 pm

Glenn ... you'll be surprised !

This is what the micro drilling set-up looks like now.

I just may break a few trying, but possible :lol:
Attachments
DSCF5946.JPG
DSCF5943.JPG
DSCF5949.JPG
There are no problems, only solutions.
--------------
Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa

User avatar
GlennW
Posts: 6969
Joined: Sun Apr 15, 2007 9:23 am
Location: Florida

Post by GlennW » Wed Oct 29, 2008 5:02 am

Ahhh....pretty clever there Jose! I didn't realize you had made a new spindle you drive with the Dremel. I've always had a little difficulty understanding how a Dremel would be accurate enough to drive small drills without them wandering and wobbling. I imagine surface finish of the part has a large influence on small drills wanting to start in the correct location. A very low Ra would be quite helpful.

I guess holding micro drills accurately would be half the battle too.

Just don't drop it :D

Glenn
Last edited by GlennW on Wed Oct 29, 2008 6:39 am, edited 1 time in total.

scott oz
Posts: 48
Joined: Thu Mar 13, 2008 9:26 pm
Location: Freshwater NSW Australia

Post by scott oz » Wed Oct 29, 2008 5:46 am

Jose,

Thanks another project :lol: . Any tips on the mounting of the dremial tool and what's the attachment on the dremial never seen that before

From the pic's it looks fairly straight forward the mounting to the drill. :wink:

Jose Rivera
Posts: 3803
Joined: Wed Feb 21, 2007 9:21 pm
Location: Vallejo California

Drilling

Post by Jose Rivera » Wed Oct 29, 2008 12:52 pm

Glenn, Scott:

Actually the small drills will find center and drill fine with the wobble.
Adding the spindle has reduced the power of the Dremel about 30%.
It lost 10K RPM by just the drag on the dual bearings and the mass of the Albrecht 0-.062 chuck.

The X-Y table I found on eBay and I got lucky to get it for nearly nothing.
It must have been part of a micro film camera or similar in order to have those nice large micrometers for each axis. Made of brass completely except for the bearing balls, ball spacers and fasteners.

I still have to use it for something I need. I wanted to have it finished so I can work on the 1/16 scale black powder cannons, but making Hummingbirds is taking all of my free time (plus chaski) :D

Those little tables are picking up a good reputation.
Here is a comment a got from this gentleman in Canada.

From Mr. Keith Harrison:

"You are probably wondering if I have a sensitive Albrecht chuck why am I interested in the Hummingbird, well I still have busted a few bits with my floor model, but that may be to do with the press or not having a fast enough speed. I have also heard some praise about your micro table from guys on a ship modeling forum."

So these words are good news to me. It will bring revenue to keep my hands off the retirement house moneys. My wife has been very patient and supporting so far.
There are no problems, only solutions.
--------------
Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa

User avatar
GlennW
Posts: 6969
Joined: Sun Apr 15, 2007 9:23 am
Location: Florida

Post by GlennW » Wed Oct 29, 2008 1:51 pm

Jose,

That's great!!

Glad to hear it is working out well for you!

If you clean out the bearings and use a light weight white grease such a Lubriplate No. 105, you may get some speed back.

Glenn

Jose Rivera
Posts: 3803
Joined: Wed Feb 21, 2007 9:21 pm
Location: Vallejo California

Bearings

Post by Jose Rivera » Wed Oct 29, 2008 2:19 pm

The bearings are sealed ball bearings.

The speed is still enough, I can get 20,000 RPMs as it is.

Using a Proxon grinder during the WEME here in Vallejo, loaned by LittleMachineShop there was no power loss. Those grinder must have double or triple the power than Dremel's.
There are no problems, only solutions.
--------------
Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa

User avatar
GlennW
Posts: 6969
Joined: Sun Apr 15, 2007 9:23 am
Location: Florida

Post by GlennW » Wed Oct 29, 2008 2:30 pm

Yes, remove the seal from one side and wash out the existing grease as it is fairly heavy and causes quite a bit of drag. You may be able to replace the seal if you sre careful. What are they something like an R?ZZ bearing?

Glenn

User avatar
GlennW
Posts: 6969
Joined: Sun Apr 15, 2007 9:23 am
Location: Florida

Post by GlennW » Wed Oct 29, 2008 2:53 pm

Jose,

Just a little tip.

Bearings for Roller Blade skate wheels are available in ABEC 7 at just about any soprting goos store. Very nice small bearigs.

Glenn

Jose Rivera
Posts: 3803
Joined: Wed Feb 21, 2007 9:21 pm
Location: Vallejo California

Post by Jose Rivera » Wed Oct 29, 2008 4:13 pm

Glenn Wegman wrote:Jose,

Just a little tip.

Bearings for Roller Blade skate wheels are available in ABEC 7 at just about any soprting goos store. Very nice small bearigs.

Glenn
That's what they are Glenn, I bought several packets on eBay.
There are no problems, only solutions.
--------------
Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa

Post Reply