EMCO FB2 help

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EMCO FB2 help

This topic has 22 replies, 11 voices, and was last updated 12 November 2016 at 21:33 by Robbo.

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6 July 2016 at 11:14 #18135
Paul McGee 1
Participant
@paulmcgee1
Ive damaged the vertical spindle assembly
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6 July 2016 at 11:14 #245610
Paul McGee 1
Participant
@paulmcgee1
Can any one help me with a potential supplier now that this part is discontinued by Emco.

If not does anyone know the spec of this thread so that I can get it made.

It looks like a Acme thread has about 16 tpi max dia .591" and might be LH
6 July 2016 at 11:20 #245611
JasonB
Moderator
@jasonb
First port of call would be Pro Machine, they have got parts for my Emco lathe when I had it that had not been made for 20years.

Hopefully a user on her can give you a part number and also more details of the screw, is it an imperial or metric machine?
7 July 2016 at 01:06 #245667
Paul McGee 1
Participant
@paulmcgee1
Thanks Jason I have and they reiterated what I heard from EMCO's agent here in Australia that the FB2 isn't supported anymore so looks like I'm on my own – not quite thanks to all the help available from sites like these. So this morning I took the part to ACA Engineering, Geebung, Qld 4034 and Phil Fisher there said we'll do what we can to fix it up, $50. Probably $500 to make a new one. We decided its not an Acme thread but a square one.
7 July 2016 at 01:15 #245669
Paul McGee 1
Participant
@paulmcgee1
Sorry haven't answered your full question.

It's an Imperial machine and it's the vertical screw for lifting the milling head p/n E3B 000 130 and it's nut. All of which seems to be L/H thread. The steel used seems to have been quite soft so if I do have a new one made it will be of harder material.

Maybe there's a market for making spare parts for the FB2 or at least buying up used ones and making the parts available. It's a nice little machine and it only cost me $600 so I can afford to spend a little bit on it.
7 July 2016 at 01:17 #245670
Paul McGee 1
Participant
@paulmcgee1
I have the full instruction book and brochure so if anyone wants a copy I'm happy to share.
7 July 2016 at 07:09 #245675
Jim C
Participant
@jimc
Hi Paul, I have a Rishton vertical mill which I am told was based on the FB2. I am looking for a manual for it to try and sort the backlash that exists in the Y axis. Therefore I would be interested in a copy of yours as the two machines do look rather similar when you look at them on the Lathes website. Thanks, Jim.
7 July 2016 at 07:57 #245678
Paul McGee 1
Participant
@paulmcgee1
Give me your email Jim and I will scan and send the pages that should help you.
7 July 2016 at 08:14 #245681
JasonB
Moderator
@jasonb
Sounds like a similar leadscrew to the one I had on my Emcomat 8.6 which was 16tpi square thread and probably 15mm OD from memory.

Looking at an exploaded diagram online the easiest option may be to modify a standard Acme or trapizoidat leadscrew which are easily avalable and modify a standard nut to replace the Emco one.

There were several copies of the EB2 but they may not have used an exact match to the thread

Edited By JasonB on 07/07/2016 08:18:48
7 July 2016 at 08:36 #245683
Douglas Johnston
Participant
@douglasjohnston98463
I had that same make of machine some time back and would follow Jason's advice and use off the shelf acme threaded rod and an acme nut. If my memory serves me correctly it would be quite easy to do this and would be much cheaper. You probably wouldn't get 16 TPI threaded rod easily off the shelf but you could use 10 TPI which would make more sense on an imperial machine.

Doug
7 July 2016 at 09:26 #245690
Neil Wyatt
Moderator
@neilwyatt
Here's a source in the USA that seem to be able to supply almost any conceivable leadscrew & nut… except square., of course!

Edit – for 16 tpi., 3/8" L/H about 50 USD + delivery for two feet of leadscrew and a bronze nut.

Neil

Edited By Neil Wyatt on 07/07/2016 09:28:41
7 July 2016 at 09:31 #245691
Neil Wyatt
Moderator
@neilwyatt
Some interesting stuff in their FAQ section.

http://www.roton.com/faq.aspx

Particularly they state there's no benefit in using special steels if you have a bronze or plastic nut.

Neil

Edited By Neil Wyatt on 07/07/2016 09:32:50
7 July 2016 at 09:36 #245692
John Stevenson 1
Participant
@johnstevenson1
Doesn't the Imperial mini mill use a 16 tpi leadscrew ? Not sure if it LH though ?
7 July 2016 at 09:42 #245695
JasonB
Moderator
@jasonb
Would not really matter if it were left or right once you got used to it.

I'd try and get a diameter close to the existing so the end can be turned down to take the handwheel, fit the top bearing, etc.

I can't see to get the Emco Yahoo group now, although mainly aimed at lathes it did have some bits about the mills.
7 July 2016 at 09:49 #245696
steamdave
Participant
@steamdave
In order to reduce inevitable wear on the Z axis leadscrew, I always give the head a helping hand by turning the handle in one hand and using my other hand to relieve most of the weight.

I know that there are counterbalance systems for some of the far eastern mills, but they are not so easy to fit on an FB2.

Dave
The Emerald Isle
7 July 2016 at 11:49 #245702
Paul McGee 1
Participant
@paulmcgee1
Thanks Neil I have emailed Roton – good find.
7 July 2016 at 11:58 #245703
Paul McGee 1
Participant
@paulmcgee1
Hm lost a reply

I had said guess what in desperation I emailed EMCO and asked for the original drawings of the spindle and they sent them straight back !

It is a ACME thread , the drawing spec says 15mm dia16 tpi links geraullt 6g

Then it has a note "Die Steigung darf gemessen innerhalb einer beliebigen Anzahl von Gangen , jedoch max auf 12" Lange nicht mehr als 0.0012"vom solmass abweichen" German anyone ?
7 July 2016 at 12:01 #245704
Paul McGee 1
Participant
@paulmcgee1
Good point Steam Dave !

I forgot to say a big thanks to you all for pitching in.

Paul
8 July 2016 at 09:02 #245787
Bikepete
Participant
@bikepete
"Die Steigung darf gemessen innerhalb einer beliebigen Anzahl von Gangen , jedoch max auf 12" Lange nicht mehr als 0.0012"vom solmass abweichen"

The pitch may be measured over any number of threads, but it may not deviate from nominal by more than 0.0012" over a 12" length.
8 July 2016 at 12:24 #245808
duncan webster 1
Participant
@duncanwebster1
I think that the mix of units 15mm OD * 16 tpi means you're unlikely to find off the peg leadscrew to suit. I think Warco used to sell a clone of the FB2, it might be worth asking them if they have the spare parts and whether they would sell them on the basis that if they didn't fit you could send them back. If they were near you might modify.

Otherwise ABSSAC sell 5/8" 10 tpi screws and nuts, you'd need a new scale on your handwheel, or fit a DRO and ignore the scale
10 November 2016 at 22:10 #265923
Jon Gould 1
Participant
@jongould1
Paul I would also like a copy of the manual if at all possible.
11 November 2016 at 09:42 #265960
Robbo
Participant
@robbo
Jon,

Message me if Paul doesn't see this.
12 November 2016 at 21:33 #266273
Robbo
Participant
@robbo
Jon,

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