Boxford model CUD mk2 lathe

Hi

It's been a while since I've been on here ,asking for some help and information .Today I bought this lathe knowing it had a couple of issues but I paid a good price for it. The first and main issue is the cross feed hand wheel is MIA the feed screw is bent just before it goes into the cross slide ,the casting that bolts onto the face of the cross slide where the feed screw and handwheel are supported is missing . Basically I need the whole cross feed screw assembly . I may manage to straighten the outer part of the feed screw I'm not sure . The serial number at the tailstock end is ...CUD--ll--26640, Is this lathe metric or imperial . I'm maybe not making any sense but I'm sure somebody will correct me.

Is there a good source for parts for this lathe or is it a case of just hunting them down .

Reason I'm so unprepared on this lathe is that my wife sprung it on me today ,she knew I was watching it so she sent a lowball offer which was accepted .

TA

Sean

A good source of info on Boxford is on the "lathes UK" website, they may have parts lists also.

Thankyou

Sean, I think it's difficult to make out metric or imperial machines from the serial number. AFAIK, metric Boxfords have the tailstock spindle graduated in metric units.( My imperial machine is in inches). The feed dials have 0.02mm graduations. The lead screw is 3mm pitch.

Thanks Clive

Sean, if you decide to measure the lead screw pitch mm / Threads Per Inch, be aware that the 3mm pitch metric lead screw is very similar to the 8TPI imperial lead screw (ie 3mm / 3.175mm).

Bob

Hi Sean you can try **LINK** there is a gentleman called Mark Lord on there who sells spares for Boxford lathes via a site called simplylathes.co.uk, you could contact him as he may well have the parts that you need.

Regards,

MickyT

Appreciate that Mickey

The cross feed screw mount in a sort of tube of varying widths along its length, then has the dial and handle attached. This makes up a self contained assembly.
Before rushing in to buy an inevitably overpriced set of parts bear in mind that the design is 'only just adequate' rather than good. It really needs small taper rollers each end of the tube, a 'top hat' shaped inner piece to the dial to take the thrust so that the dial is not taking any part in setting the end play, and a better system for locking the handle to set the end float precisely. So even if you had one you would need to hack it about. Also the dial needs to be bigger.
See if the screw part is in good condition relative to the nut and look into cutting it off and attaching it to a new plain section for the handle etc.

I'll take a photo later of the standard bits.

This is the cross slide screw for a Boxford A so has the built in gear for the facing feed which you will not have.

The 'tube' is 3 in long. The thin bit is 3/4in dia x 1 in long, then middle is 1 in about 1.5 in long and finally the fat end is 1.5 as is the dial.
The hole in the tube may be a bit difficult to drill dead true which may cause binding spots so I suggest drilling it before turning the outside. Make small accurate centred plugs for each end then turn between centres. If you are modifying the leadscrew because of the damage I suggest extending tube and screw shaft by half an inch which will give more space for the topslide to clear the enlarged dial when slewed round.
The handle is held on by a grub screw into a dimple and the end nut is 1/4 Whitworth so no sensible adjustment for endfloat. I intend to replace with eg ME 40 tpi. The tube will be shortned and recessed at the fat end to take thrust bearings, The dial will grow to at least 2 in (which later SouthBends used).
ARC sell thrust bearing mod kits for the Myford which are probably too small but there may be istructions around somewhere for guidance.

PS in my last post I didn't mean taper rollers I meant roller thrust bearings.

Edited By Bazyle on 02/11/2021 12:32:20

That's totally different to the cross-slide screw on my Boxford Model C (bench type) - mine has ball thrust bearings, resettable dials and endfloat adjustment - and I have no reason to think these features were not original (it has the same set-up on the compound too).

Maybe the power crossfeed on the A and B models necessitated a different arrangement?

Rob

Interesting. The spares site shows the thrust bearings so I wonder when it was introduced. Possibly 1963 from the spares list so postdating mine by several years. I see the 'tube' is called the 'cross side bush'.
BTW this diagram shows the leadscrew nut the wrong way round in my opinion as the clamp should be towards the handle to avoid taking the cutting force on the clamp slug.

Hi, well I guess diagram R in the scan below was an earlier version.

Regards Nick.

I'll insert a photo of my cross feed screw. I have sourced a couple of parts, the casting that houses the outer thrust bearing washers and supports the hand wheel along with a micrometer dial which is imperial which I might be able to work with until I source a metric one . I'm toying with making a hand/thumb wheel . Going by what I've read this is not the standard cross feed screw. Parts seem quite hard to find . Anyone have a set of thrust washer bearings for this 

Cross feed screw below

Edited By sean logie on 07/11/2021 19:18:51

Edited By sean logie on 07/11/2021 19:43:00

Drawing for your screw. Looks pretty standard to me. Only difference is the metric pitch on yours.

Boxford cross slide screw

Edited By Pete Rimmer on 07/11/2021 20:07:21

Just for the sake of my sanity, can you clarify whether your lathe has power cross-feed or not? If it has, it's not a Model C, so that may indicate the bed is not original (or the saddle/carriage/leadscrew assembly isn't, depending how you look at it).

Rob

That screw is for a model A or B but it'll work in a model C all the same. Could be that someone swapped it out.

Hi Rob,

my lathe is a Boxford model CUD ,I believe this screw is not original to my lathe, but it fits and works none the less. Having it gives me options I believe ...

Sean

Thanks Sean

I suspect it's a CUD that tripped on the pub doorstep during a heavy night out, it might pay you to look for cracks in the apron.