PDA

View Full Version : Looking to have a small milling job done.



Chucktin
01-17-2016, 04:01 PM
I've got a small piece I need enlarged and 6 copies made. Material is 1/4" Aluminium. I can specify alloy. Looking for a small shop. Not a complex piece roughly size and shape of a auto safety belt tongue fits on 2" webbing.
CVT.

KIMFAB
01-17-2016, 04:39 PM
Need to get an idea of what it looks like and more importantly where are you?

PStechPaul
01-17-2016, 04:58 PM
This is mostly a DIY forum, but some members might be willing to do a small machining job for you. If you have a drill press, you might be able to get an X-Y vise and an end mill in the chuck and DIY. If you put an ad on your local Craigs List you might find someone nearby to help. But in any case, you need to supply a drawing with dimensions and tolerances, or perhaps sample to copy.

ahidley
01-17-2016, 05:13 PM
Maybe I can assist. Ahidley@aol.com

ikdor
01-17-2016, 05:17 PM
You could also try at practicalmachinist.com as over there they all do this for money, but don't include how much you think the/their effort is worth. You'll never recover from that.
And if you're in the US, don't mention that it resembles part of or is part of a safety harness. It triggers all kinds of pavlovian reactions :-)

Igor

flylo
01-17-2016, 05:51 PM
The young man I've been helping can do it & is pretty well set up. PM if interested & I'll give you his #.

Mcgyver
01-17-2016, 06:12 PM
Looking for a small shop.

is this from a fear of large spaces, or just being cheap? at home or work I value my time....one might argue that commercial shop would be cheaper end of the day than lightly equipped home shop - combination of the right equipment and used to working efficiently


Not a complex piece

strike 2.....post a drawing, if I have to machine it I'll say how complex it is to make.


roughly size and shape of a auto safety belt tongue fits on 2" webbing.

if its anything safety related, I wouldn't touch it....fine for a commercial shop, they have liability insurance (or should)

imo you should lead with, here's a drawing, anyone in my area want to quote it? Do a drawing and post it at PM - there's a section for it. If it really is simple you'll get quotes and be pleasantly surprised that its small dollars. Helpful as well to say where you are.

Chucktin
01-17-2016, 06:18 PM
Ok, I didn't know where to begin. I'll take that advice.

Mcgyver
01-17-2016, 06:20 PM
Ok, I didn't know where to begin. I'll take that advice.

apologies if i came of abrupt, just tryin' to call it as i see it :)

oxford
01-17-2016, 06:52 PM
If you are going to post it on Practical Machinist you had better make sure there is a detailed and toleranced drawing and everything is correct on it.

Mike Amick
01-17-2016, 07:26 PM
Whispering in your ear ....

Don't bother asking over on PM ... there are lots of guys here that would love to do it .. Several have offered.
Send them the drawing ...

vpt
01-17-2016, 08:03 PM
Would plasma cut work?

PStechPaul
01-18-2016, 02:59 AM
You might try making a drawing of the part using the free software from http://www.emachineshop.com/. You can choose from a variety of materials and get instant quotes for various quantities.

Lee in Texas
01-18-2016, 03:31 AM
CNCzone.com has a Request For Quote forum. I've had a couple of things made off that board.

Punkinhead
01-18-2016, 05:50 AM
This is mostly a DIY forum, but some members might be willing to do a small machining job for you. If you have a drill press, you might be able to get an X-Y vise and an end mill in the chuck and DIY.
Please don't advise people to do this. It's dangerous. Drill press morse tapers are not made to take side loads. The cutter stands a very good chance of ending up embedded in the OP's body.

PStechPaul
01-18-2016, 06:44 PM
From the time I got my mill/drill around 2004, until I got proper end mill holders and collets a couple years ago, I used end mills in the drill chuck for several milling operations. I did have some problems with the chuck coming loose from the JT taper, but I was always able to do the operations by taking light cuts and frequently stopping to bang the chuck into the taper more tightly. Mostly I had problems because I did not have the spindle locked securely, allowing it to ride up, and because the round column was not tight enough, so the head moved while I was milling so the slots were not straight. I agree that it may be unsafe, but then again any machine tool presents dangers if you are unfamiliar with its operation and the principles of proper work-holding and machining techniques. I started by experimenting slowly and cautiously, and then increased the speed, feed, and DOC until I sensed that it was not cutting right. Shortly before I bought the end mill holders, I even tackled difficult work like this:

http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0605_800x600.png

There was little problem with milling phenolic:
http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0609_800x600.png

This is where I really started having problems:
http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0615_800x600.png

But I got 'er done:
http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0616_800x600.png

John Stevenson
01-18-2016, 09:04 PM
http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0615_800x600.png

But I got 'er done:
http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0616_800x600.png




You should have used an axe, you would have got a better finish :p

PStechPaul
01-18-2016, 09:15 PM
Finish was not important. I just needed to remove metal, as this is what I was doing:

http://enginuitysystems.com/pix/Rear_Axle_Bearing_Support_0617_800x600.png

And I epoxied it in place, so roughness was actually a feature, rather than a flaw:
http://enginuitysystems.com/pix/Rear_Bearing_0626_800x600.png

But that was over two years ago, and I was a much clumsier bastard then, than now. :)

Chucktin
01-21-2016, 08:12 PM
I haven't given up. I have a drawing and specs on raw stock. Tolerances, I don't know, but the piece is simple. Tried a test by emailing the drawing to myself and that bombed! I will have an opportunity to try again this weekend.

oxford
01-21-2016, 08:27 PM
In general, the looser you have the tolerances the cheaper it will be to make. If you only need +/- .010" do call out +/- .001"

GEP
01-21-2016, 08:51 PM
I've got a small piece I need enlarged and 6 copies made. Material is 1/4" Aluminium. I can specify alloy. Looking for a small shop. Not a complex piece roughly size and shape of a auto safety belt tongue fits on 2" webbing.
CVT.
I can help you. I am in SW Michigan PM me if you like