Search found 1873 matches

by Mr Ron
Wed Jan 15, 2020 3:03 pm
Forum: General Discussion
Topic: Keeping drilled holes aligned
Replies: 38
Views: 1031

Re: Keeping drilled holes aligned

I will be using the mill with a spotting drill to locate the holes, then go back and drill the holes. When scribing centerlines, how much is allowed for the thickness of the scriber? I'm guessing it would be around ±.003 depending on how sharp the scriber is. When scribing aluminum, I have been usin...
by Mr Ron
Tue Jan 14, 2020 2:02 pm
Forum: General Discussion
Topic: Keeping drilled holes aligned
Replies: 38
Views: 1031

Re: Keeping drilled holes aligned

Thank you all for your responses. I ordered a carbide 3/16" dia spotting drill, 90°, 1/2" flute length by Republic. Here is an example of what I am doing. The parts will be cut apart after all machining is done.
Lower element top knuckle.jpg
by Mr Ron
Mon Jan 13, 2020 2:06 pm
Forum: General Discussion
Topic: Keeping drilled holes aligned
Replies: 38
Views: 1031

Re: Keeping drilled holes aligned

If I use a carbide spot drill, will it stay on location, or will it "skate" on a slippery brass surface?
by Mr Ron
Sun Jan 12, 2020 11:26 pm
Forum: General Discussion
Topic: Keeping drilled holes aligned
Replies: 38
Views: 1031

Keeping drilled holes aligned

I am gang milling 8 items in brass. The holes are #41 spaced 0.375" apart in a straight line. I can layout the holes using my DRO; so far so good. Here is where I am stumped; I need the holes to be exactly in line, but a #41 drill will drift off location unless I prick punch first; drill bits that s...
by Mr Ron
Mon Jan 06, 2020 11:01 am
Forum: General Discussion
Topic: First time using super glue chuck
Replies: 28
Views: 1177

Re: First time using super glue chuck

I'm glad you posted this. I am in the position of having to make some small parts and not being able to hold them in a vise for milling. I thought about double stick tape, but not super glue. That is the way I will hold the small parts. Thank you for posting.
by Mr Ron
Sun Jan 05, 2020 1:34 pm
Forum: General Discussion
Topic: Floating reamer holders
Replies: 21
Views: 1391

Re: Floating reamer holders

I'm hardly an expert on anything, but what comes to mind is to ream 1 or 2 tens under and finish to size by lapping. I think that way, a consistent diameter can be achieved.
by Mr Ron
Mon Dec 30, 2019 2:05 pm
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 702

Re: How to make small duplicate pieces?

Here is how I would attempt to do it: 1) Start with an overlength piece finished to .250 x .571 . 2) Drill the holes accurately, allowing for a saw kerf plus .010 for finishing. Put an extra hole at each end. Make a jig if necessary. 3) Saw the slots with a slotting saw. 4) Part the pieces off accu...
by Mr Ron
Mon Dec 30, 2019 10:47 am
Forum: General Discussion
Topic: Ball end mills
Replies: 17
Views: 1702

Re: Ball end mills

johnfreese wrote:
Sun Dec 29, 2019 9:20 pm
Remember with the mill spindle vertical there is zero fpm on the centerline of the cutter. As others suggested tilt the spindle to shift the cutting area away from dead center.
I wouldn't be feeding on the "Z" axis (plunge), but feeding in on the "X" or "Y" axis.
by Mr Ron
Mon Dec 30, 2019 10:40 am
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 702

Re: How to make small duplicate pieces?

Thanks for the replies. All told me how to cut the surfaces, but my main concern is; how to hold the piece in a mill vise as there is not much of a surface to grip. The 1/4 square collet is good, but I don't have one and other similar small pieces are of different bar sizes. I am hoping to do the wo...
by Mr Ron
Sun Dec 29, 2019 7:00 pm
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 702

How to make small duplicate pieces?

KNUCKLE ASSY.jpg KNUCKLE DET.jpg I don't know how this is going to turn out as the parts I'm trying to display are very small. but if you can zoom in, you might be able to see what I have. This is a sample part I have to make in duplicate. I've laid it out in the 1st picture and the 2nd picture sho...
by Mr Ron
Tue Dec 24, 2019 10:55 am
Forum: Milling Machines
Topic: Tri-onics Pro Max DRO
Replies: 4
Views: 626

Re: Tri-onics Pro Max DRO

Try a place like Mouser electronics or Newark electric or Allied electronics. There are many electronics companies that sell nixie tubes and also check out surplus dealers.
by Mr Ron
Sun Dec 22, 2019 2:27 pm
Forum: General Discussion
Topic: Ball end mills
Replies: 17
Views: 1702

Re: Ball end mills

I couldn't afford a Gorton or K&T much less a Bridgeport. Since my hobby is building model trains, my 6x26 mill is all I need for the present. If I were in the market for a new mill, I would be looking at something along the lines of Jet, Bridgeport, Kondia or anything with R8 tooling as I realize h...