By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Myford VMC mill

service info on myford VMC mill.

All Topics | Latest Posts

Search for:  in Thread Title in  
RRMBK24/08/2022 23:26:28
159 forum posts
18 photos

Hello all .

Please can anyone provide the specification for the two belts used on a myford VMC mill from around 1980.

Also can you tell me how to lubricate the quill bearings.

I don't have a manual for the mill, and attempts to find one on the web have just led me down interminable rabbit holes ending in a request for payment.

Many thanks.

DC31k25/08/2022 07:00:58
1186 forum posts
11 photos
Posted by RRMBK on 24/08/2022 23:26:28:

I don't have a manual for the mill

You do now:

https://ostiatools.co.uk/machinery-manuals/

Part 25 A34.

It is useful in this case to search for both 'vmc' and vm-c'. To you, they are the same; to the al gore rhythm, they are different.

Russ B25/08/2022 07:47:41
635 forum posts
34 photos

Also, note the makers name on the front, it's not Myford.

Here's a slightly less wonky version!

https://www.dropbox.com/s/1xl3o958x2qupqo/_Kao%20Fong%206x24%20Manual%20KF-VM-C.pdf?dl=0

Tony Pratt 125/08/2022 08:27:01
2319 forum posts
13 photos

I have a Myford VME mill so slightly larger table and I can't see any way of lubricating the spindle bearings, I also replaced the overly stiff original belts with a linked type with great success.

Tony

RRMBK25/08/2022 08:56:13
159 forum posts
18 photos

Thank you very much for the quick responses. Greatly appreciated. The manual and exploded parts drawing is just what I needed.

Bearings are clearly sealed units, so after 40 years probably best to replace ! and the belts are readily available locally.

Once again many thanks.

Russ B25/08/2022 11:49:35
635 forum posts
34 photos

I think I looked in to the spindle bearings many years ago - I seem to recall having no luck with the thrust ball bearing at the bottom - I began thinking about an upgrade to a taper roller on the nose but after removing the pulley and bearings, cleaning and adjusting it's all been solid and sound ever since.

I was thinking along the lines of a "Gamet100035/100072C Super Precision Flanged Tapered Roller" The flange provides about 2mm clearance behind the bearing, and reduces the nose to table by 9mm or so. I'd have fit a standard rotary shaft seal in a carrier secured to the quill to seal it. I can't remember if I did a drawing - I have two young kids now and focus my spare time on tinkering with other things and if I get some me time, I'm zapping about on my 2 stroke faster than I should be, or tinkering with it.......

I'm sure a normal taper roller would suffice for a 10th of the cost (or less!)

Russ B25/08/2022 12:05:53
635 forum posts
34 photos

This was I think.... a drop in replacement, do your own homework though!

Timken 19138X/19283

but still, a seal and carrier would be needed - no trouble for anyone on here I'm sure! I would just 3D print on, from design to part in just an hour or 2, and if it broke, I'd think about machining one... and then remember I can much more easily just press print and another will appear.....

Nigel Graham 225/08/2022 12:15:26
3293 forum posts
112 photos

Thank you for raising this, RRMBK.

I have the same machine, and it suffers from excessively stiff quill vertical travel and as well as that it's quite possible the bearings or at least their lubrication are a little old and worn out by now. It also has a problem that often makes inserting the R8 tooling difficult - it feels like a loose key or pin not reliably engaging the keyways.

.

Thank you DC31K and Russ -

Have bookmarked these and down-loaded the Ostia manual. I think they are actually the same document. I don't think they differ from the information I have already but I will study them carefully to see if they give any more information... such as actually how to dismantle the thing to service it!

I did at least find my existing manual useful for making a drawbar to replace the original lost in a house-move. While at it the sectional drawing showed how I could make it self-ejecting.

Russ B25/08/2022 14:18:45
635 forum posts
34 photos

I should probably reword that, "upgrade" - the original separate roller and thrust bearings no doubt provide much better support for heavy side loads, but I expect the taper rollers by design to provide less radial play and therefore better support for smaller higher speed cutters - which I more up my street, hence, "upgrade"

John Haine25/08/2022 14:22:42
5563 forum posts
322 photos

I have a VMB which has a similar belt arrangement except that the intermediate pulley, instead of floating, was fixed on a sliding plate that had to be loosened, adjusted, then tightened when you changed belt ratios on the front, a stupid design! When I upgraded to a 3ph motor + VFD I used the intermediate pulley on the motor as it had the same dimensions as the spindle pulley and eliminated the intermediate pulley stage. Haven't missed it!

Russ B25/08/2022 14:42:56
635 forum posts
34 photos

If anyone is interested, not the best quality scan but some sales information.

https://www.dropbox.com/s/4s35k4v8iho6lfl/Full%20page%20photo.pdf?dl=0

Bob Unitt 127/08/2022 16:16:38
avatar
323 forum posts
35 photos
Posted by John Haine on 25/08/2022 14:22:42:

I have a VMB which has a similar belt arrangement except that the intermediate pulley, instead of floating, was fixed on a sliding plate that had to be loosened, adjusted, then tightened when you changed belt ratios on the front, a stupid design!

Curious - I have a VMB bought direct from Myford in 1998, and it has a floating intermediate pulley.

Douglas Johnston27/08/2022 16:30:26
avatar
814 forum posts
36 photos
Posted by John Haine on 25/08/2022 14:22:42:

I have a VMB which has a similar belt arrangement except that the intermediate pulley, instead of floating, was fixed on a sliding plate that had to be loosened, adjusted, then tightened when you changed belt ratios on the front, a stupid design! When I upgraded to a 3ph motor + VFD I used the intermediate pulley on the motor as it had the same dimensions as the spindle pulley and eliminated the intermediate pulley stage. Haven't missed it!

I have the poly-V pulley version of the VMB with variable speed invertor and it is almost impossible to get access to the bolts of the sliding plate to change the belt positions. As a result I never change the belt position and rely on the VFD for speed change. As you said it is a very poor design.

Doug

John Haine27/08/2022 16:35:28
5563 forum posts
322 photos
Posted by Bob Unitt 1 on 27/08/2022 16:16:38:
Posted by John Haine on 25/08/2022 14:22:42:

I have a VMB which has a similar belt arrangement except that the intermediate pulley, instead of floating, was fixed on a sliding plate that had to be loosened, adjusted, then tightened when you changed belt ratios on the front, a stupid design!

Curious - I have a VMB bought direct from Myford in 1998, and it has a floating intermediate pulley.

Bought mine in 2003 so they must have changed the design.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate