Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 15 of 46
Thread: CVA mill
-
9th August 2014, 11:21 AM #1
CVA mill
The little CVA mill has arrived . I will have to use the neighbours tractor to manouvre it into the shed . It is a lot heavier than it looks at 750kg .
It s in good shape considering its age , the table has suffered from a few mishaps and the top casting has been repaired by somebody - id say the machine has fallen over at one time and the top casting broke off , its been brazed together very neatly.
will post pics soon Mike
PS some history of the company CAV/CVA:the early years | Portland Road, Hove | Streets | Places | My Brighton and Hove
Almost 50 Years of CVA Machine Tool Manufacture | Portland Road | Portland Road, Hove | Streets | Places | My Brighton and Hove
-
9th August 2014 11:21 AM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
9th August 2014, 06:51 PM #2
pics
The pics
It is the 5 speed model and it has the #3 morse spindle . It is far more rigid than my DM45 is so it should handle some heavier work Mike
-
9th August 2014, 07:08 PM #3SENIOR MEMBER
- Join Date
- Aug 2011
- Location
- victoria
- Posts
- 524
-
9th August 2014, 07:31 PM #4GOLD MEMBER
- Join Date
- May 2011
- Location
- Murray Bridge SA
- Posts
- 3,339
Looks like a bit of bush engineering going on there, good old cocky wire holding things together. I'd say a restoration job is required.
Nice looking machine though.
Kryn
-
9th August 2014, 07:38 PM #5
transport
I used e-go ( hunter express ) to get it down here , didn't cost much to move it because its not a very wide or deep item, the weight doesn't seem to matter to them . The seller sat it on a pallet and wired it down . It is a very top heavy machine , and it would probably topple over very easily because the base/foot has such a small footprint . The machine has a solid feel to it , so much better than the flimsy 45 mill drill Ive been using
-
10th August 2014, 01:14 AM #6Senior Member
- Join Date
- Mar 2009
- Location
- Melbourne
- Age
- 54
- Posts
- 380
G'day Mike,
That's a nice looking machine you've got yourself there.
Looks like it has a pretty handy work envelope for a machine with such a small footprint.
Nice pickup mate.
Cheers,
Greg.
-
14th August 2014, 05:39 AM #7Member
- Join Date
- Mar 2014
- Location
- Norway
- Posts
- 53
Beautiful mill. I talked a friend into buying a CVA lathe which is a wonderful piece of gear. Heavy and accurate and no expense was spared in making it price.
Paul.
-
6th September 2014, 08:46 PM #8
worn
An update
Ive had the table ground . And today removed the Y axis lead screw and nut as it has substantial wear . I like the clever design of this milling machine , it allows you to remove the leadscrew and nut without disassembling any major bits . The acme thread is 7/8" and 5 tpi .. I will have a go at making a new leadscrew and nut
Mike
-
7th September 2014, 07:28 AM #9future machinist
- Join Date
- Mar 2008
- Location
- nowra
- Posts
- 1,361
Well I have another cva mill in my trailer.
BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE
Andre
-
7th September 2014, 08:37 PM #10
Twins !
Well done ! We can compare the ins and outs of these nice mills . I spent today trying to make a new Y axis leadscrew, the little Sheraton late struggled and the threading process turned into a complete mess . Despite roughing out the thread with a tool, the 3/4 hp motor stalled a few times during the plunge cutting with a sharp acme form tool . I will have another attempt on a larger lathe with more stability and power .Mike
-
7th September 2014, 09:37 PM #11future machinist
- Join Date
- Mar 2008
- Location
- nowra
- Posts
- 1,361
How much backlash do you have mine has about 1/4 turn on x and y. Mine also had the six wires so I can hook up to the vfd photos next week.
BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE
Andre
-
7th September 2014, 09:56 PM #12
backlash
Same with mine, about 1/4 turn on the Y and about 1/3 on the X .
I am going to cut the original leadscrew forward end off, and drill a hole into it . Then machine a spigot onto the new ACME leadscrew section and loctite it in to the original forward / handle end . OK sounds like the motor can be set up for Delta 240 3 phase . Look forward to the pics
BTW Im going to try this http://bbs.homeshopmachinist.net/thr...s-the-easy-way
Mike
-
8th September 2014, 02:27 PM #13GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
Hi Mike,
Whats wrong with the leadscrew? Just wear?
Stuart
-
8th September 2014, 02:40 PM #14
WEAR
hi
Yes , the Y lead screw is worn in the middle, where most lead screws wear The ends of the screw are ok , you can see the thinner worn threads in themiddle . The long bronze nut will be worn as well. Will be interesting doingthe replacement acetal nut trick - May take a few trial attempts before I workout how to do it
-
8th September 2014, 03:05 PM #15GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
Hi Mike,
Bearing in mind I cant see how worn your leadscrew is and I've never done this.
Assuming most of the wear is in the nut and only a little in the screw. As you are making your own nut to suit, you dont care if your thread form it a little off.
Would it be a completely stupid idea to try recutting the screw you have(possibly grinding the thread if you have a TPG)?
You dont have much to loose.
Stuart
Similar Threads
-
combination circular saw blade for saw mill (lucas mill)
By Tim Creeper in forum SMALL TIMBER MILLINGReplies: 17Last Post: 26th April 2013, 12:48 PM -
Selecting a small Mill / Mill/Drill
By Wombat200 in forum METALWORK FORUMReplies: 31Last Post: 15th March 2012, 10:58 PM -
Arboga EM825 mill vs Hercus model 0 mill?
By neksmerj in forum METALWORK FORUMReplies: 23Last Post: 14th May 2011, 03:16 PM -
No. 0 Mill Serial Number and Mill at Work Photos
By Anorak Bob in forum THE HERCUS AREAReplies: 1Last Post: 30th December 2008, 03:31 AM -
Comparison Between C.S Mill & Bandsaw Mill
By echnidna in forum SMALL TIMBER MILLINGReplies: 2Last Post: 7th October 2007, 04:26 PM