Mill advice needed
 

As the title says, i'm in need of some mill advice.
I've been looking into buying a mill for some time now and been weighing up the options.

I have the chance of buying a used (quite old) Bridgeport turret J-head mill (UK built)
Would this be to big for model making and a novice machinist?

Thanks for looking and any opinions appreciated

Stu

Re: Mill advice needed
 

I'd rather have too big than be limited. There are several occasions where I have an idea that I can't create because I'm limited to my Taig Micro Mill's size. If it's a reasonable price and you can afford it, go for it.

Re: Mill advice needed
 

check it and make sure that it is working as in not to much slop
and then make sure you have the room lol don't ask how I thought about this question lol
and the more tooling that comes with it the better and as you have been told you can always use small bits in a big mill but can't always use big bits in a mini mill

Re: Mill advice needed
 

Thanks Guys,

I was staying away from micro mills for that very reason, I don't want to have to upgrade in a year or twos time and I'm fortunate to have plenty of room for a large machine.

If there is a lot of play, is it adjustable or possible to re-build?

Stu

Re: Mill advice needed
 

If I could have, I would have bought a Bridgeport knee mill too, but I did not have a good place for it. It's best to keep them in a climate controlled environment, otherwise they will rust. An insolated garage will do. Drastic changes in temperature will cause the machine to sweat, and the moisture will cause rust.

If you have a means to do so, by all rights buy the biggest mill you can. You will be glad when you need the extra x, y, and z axis working envelope. A smaller mill can still do larger parts, but it means repositioning your work a lot more, and that's a pain. Your throat height, however, will be something you cannot overcome.

That said, I am more then pleased with my bench top milling machine. It has it's limitations, but for what I do, it has been the best tool purchase I have ever made. I use it almost daily. My thought is any milling machine is better then no milling machine.

Re: Mill advice needed
 

Very constructive, thankyou,

I have a similar problem with surface rust on my cast woodworking machines, I usually coat them with an anti-rust after use.

Iv'e looked at bench top machines but second hand they go for way more than a full sized, more demand I guess and new is out of my budget.

Stu

Re: Mill advice needed
 

Used Bridgeports can be rebuilt but it may cost more than what you pay for the mill. I wish that I had the room for a full size machine of any type. That is why I have Sherline machines. I have 6 of them right now that get almost daily use. A couple of them are dedicated lathes for making my bezels.

I would go look at the mill and ask to see it run if possible. Check to see how much the hand wheels move before the table moves. This will tell you how much 'slop' is in the machine.

Good luck in your dealings :)

Re: Mill advice needed
 

Hey Stu ..you probably thought of this but its also important as to what you have available for a power supply .I am not sure what the average service in europe has .how many amps / volts ..Most of your smaller bench top machines out there will plug into most outlets and changing panels are quite expensive. anyway hope you find something great

Re: Mill advice needed
 

Wow that sounds like quite a production shop you have there!
Would love to see some pics.

I live in France and the machine I'm interested in is in the UK so I may have to take a gamble:eek:

I have a 3 phase 45 amp supply (15amps per phase) and run 3ph woodwork machines so hopefully should have that covered, but thanks anyway.

Stu

Re: Mill advice needed
 

Been awhile but picked up my Bridgeport yesterday, I asked the local quarry man to come up with his forklift to unload it from my van, here it is in position:

http://i1252.photobucket.com/albums/...psd62a2684.jpg

http://i1252.photobucket.com/albums/...psf988ebd3.jpg

He also threw in the deal a 10inch rotary table, a fixed machine vise and a swivel one:

http://i1252.photobucket.com/albums/...ps9c972f7e.jpg

Its also got a Mitutuyo DRO fitted (not in pics) just need to get it wired in.
I have to say I'm pretty chuffed:D, its an old machine thats seen some action but for what I want it for should last me for years.

Thanks for every ones advice
Cheers
Stu

Re: Mill advice needed
 

Wow, That is a lot of machine. I cant beleive you had to call in a favor to help unload it.

Re: Mill advice needed
 

Looks like you got a good deal :)

Re: Mill advice needed
 

It weighs a ton, literally, and he was more than happy to help, I offered him payment for his services but he refused and said "thats what neighbours are for" (I also buy my granite from him if I need it on a job, so I guess that helped)

Yeah I'm really pleased with it so far, got it wired in and started making some chips:D

Had a spare 7 inch 3 jaw chuck for the lathe so I made an adaptor plate for the rotary table and machined a centering bar on the lathe:

http://i1252.photobucket.com/albums/...ps4567a9fa.jpg

Cheers
Stu

Re: Mill advice needed
 

Got my new 2 inch indexed face mill today and just had to give it a try:

Also fixed the power feed unit, you gotta love power feed!

http://i1252.photobucket.com/albums/...ps7ea25b21.jpg

http://i1252.photobucket.com/albums/...ps221a435c.jpg

Not sure what the best speed to run it at though:confused:

Cheers
Stu

Re: Mill advice needed
 

Looks like fun and potentially a hobby all by itself?

Jim

Re: Mill advice needed
 

Its awesome :D

I like it that much that I treated it to a new DRO, the old one was very basic and one of the scales packed up, was cheaper to buy a complete new kit from China:

http://i1252.photobucket.com/albums/...ps398c787a.jpg

Scales installed with the original covers:

http://i1252.photobucket.com/albums/...ps74bc3689.jpg

http://i1252.photobucket.com/albums/...psf8ee4f86.jpg

Cheers
Stu

Re: Mill advice needed
 

Hello Stuart

Seems we have something in common:) as well as an interest in your new project, I also bought an old Bridgeport some years ago, it also had a worn out Anilam Wizard DRO, can you point me in the direction that you bought your DRO from?

Also and this is a tad cheeky:) would you be happy to share your JD sketches with me?

All the best

5"

Re: Mill advice needed
 

Hi 5"

The Bridgeport really is a fantastic piece of kit, not that I have anything to compare it to mill wise, would like to see some pics of yours and anything you have made with it.

I bought my dro kit here: DRO kit

They were really good to deal with, great comms, took paypal and arrived a week after ordering by fedex, great price too!

With regards to my sketches, theres not much to share really, they are sort of "on the back of fag packet" type thing.
Its a case of trial and error, I take measurements make a few notes and then machine until it fits and looks right, its all part of the fun :D

I can try and help you out with dimensions and wot not if you need it but it might be best to wait until I've finished mine to make sure that it works:eek:

Cheers
Stu

Re: Mill advice needed
 

Stu

Amongst other small jobs on the Bridgeport I have cut the gears for my 3" Burrell traction engine, I'm currently doing some trials on cutting the spline for the crankshaft:jaw:not without some problems like cutter coming loose in FC3 holder
http://www.phoneinsick.co.uk/images/Photo0108.jpg

http://www.phoneinsick.co.uk/images/Photo0121.jpg


I hope the pics are of reasonable quality

5"

Re: Mill advice needed
 

Wow that's some engineering right there! I don't think you going to need my help!
Where are you located? looks like a Union Jack in the background?

Stu