Member postings for SteveI

My guess based on the taper rough dimensions, the size of the chucks that were mounted, is that the backplates are for a Myford MG12 grinder.

Steve

Hi,

My MK2 attachment came with a few items that are not in the pictures shown so far. So I've put a few pictures into an album. If you want any measurements of the items pictured do let me know.

Oily Rag - I'd be interested to see pictures of the lathe tool radiusing holder you have. Is it anything clever?

Thanks,

Steve

not quite london but drill service in horley www.drill-service.co.uk do (or at least have in the past) ground reamers to a specified size. I am a satisfied customer.

Hugh,

Sorry to side track your thread. I don't suppose you have details of the types of copy attachment hepworth made? I am looking for a unit for my lathe which is smaller than the M300 (10" swing) and has the cross slide drilled and tapped for a "copy attachment". Feel free to PM me as required.

Thanks,

Steve

Hi,

I should have been clear about the sizes; those are the names that Arrand gave the different models. Based around the maximum bore using a side tool. From the catalogue the outside diameters of the heads are:

the 3” head 1.3/8” or 35mm

the 4.5” 1.3/4” or 44mm

The 5.25” 2.1/8” or 54mm

the 6” 2.1/2” or 63mm

the 6.5” 2.3/4” or 70mm

8” boring and facing 3.1/2” or 89mm

10.5” 4” or 102mm

The catalogue I have does not mention a 3.25” head.

AFAIK Arrand does not manufacture any more but still trades selling from stock. I purchased my 3” head a few weeks ago direct from Arrand.I think rotagrip have some of the heads in stock according to their website.

steve

Hi,

the 3” head uses M14x1

the 4.5” and 5.25” use 16mm x 1.5mm, the shanks are the same as their fly cutters.

the 6” I don’t know.

the 6.5”, 8” boring and facing and 10.5” all use the same shanks but these are held on by a register and 4 shcs.

steve

Wow very interesting. Which options did you go for it?

Steve

Bill,

Item 124 is most likely something other than a MT4.5 sleeve. Your link is to the southbend type of boxford. The X10 is the type with the D1-3 camlock nose bored for a MT4.5.

most likely plus VAT.

Steve

Edited By SteveI on 10/03/2019 14:38:56

John Paton,

I am not sure that the MT5 and MT4.5 tapers are the same. Machinery's Hanbook (30th Edition) states that the taper per foot for morse taper 4.5 is 0.62400 and MT5 is 0.63151. When I made my MT4.5 sleeve (Boxford lathe) I used a MT7 as a gauge, which as far as I know is the only other morse taper which does have the same taper as MT4.5.

Also 2mm to grind is a lot to grind. If it were me I would want to turn away most of that 2mm before the grinding.

I am not sure what they cost but Boxford used to supply MT4.5 to MT3 adapters and MT4.5 to 5C collet adapters, and I think Grizzly in the USA used to sell MT4.5 sleeves as well.

Steve

Inspirational

Hi John,

Wonderful job. Very interesting and I am working my way through the paper you linked to.

Thanks,

Steve

John,

Thanks for the updates, a most interesting build.

I am looking forward to learning about your linear rails and how they mount with particular reference to your need to lap the steel to the tolerances you quote. Which brings up the question what are you going to machine on this tool and what kind of tolerances are you aiming for?

Thanks,

Steve

John,

Wonderful thread and please do keep posting, the more detail the better!

Steve

Ronan,

CR Tools in Sheffield have several options very close to what you want.

**LINK**

I have no connected except as a satisfied customer.

Steve

Hi,

I have been given a "Harris" milling machine arbour adjustable spacing collar. Picture here:

The collar is in 2 parts with a 20 TPI thread. The nut component has 50 teeth around its outside diameter. The screw part has 2 small tapped holes. Presumably for a ratchet to allow easy adjustment of the spacer by 1 tooth/thou, at a time. This ratchet mechanism is missing.

I am wondering if anyone knows of how this looked originally so that I can make a suitable replacement.

Thanks,

Steve

Niels,

Thanks for keeping this thread alive. I have a feedback for you. The torque required to tighten ER50 collet's is considerable. Especially squeezing them down to the lower end of their 2mm closing range. This is based on my own experiments with some second hand regofix ER50 28mm, 30mm, and 32mm collets and a regofix ER50 ball bearing nut. you will need a very secure spindle lock on your design. Oversize collets are available for ER40 utpo 30mm. Something to think about.

I have recently come in to ownership of a small hardinge UM mill from the 1940's. Saved from the scrap man. Unfortunately this "lucky" find comes with a 5C (!!!!) horizontal mill spindle and no tooling. I am looking to design and make a new 30 taper spindle for it. So please keep posting your thoughts!

Steve

Keith,

Interesting. What number spindle does your lathe have? A number 5 size has a spindle bore of approximately 1.25" stock and fits 5C collets. A number 4 is approx 1" stock and fits 4C collets, 3C I am not sure but fits 3C collets. There are 4 deg taper and threading spindle nose variants for the outside of the spindle noses.

There is a chap that is a regular poster on the practical machinist Hardinge forum who is a fountain of knowledge on Hardinge manual lathes and mills, especially the older models. His name is on the lathes.co.uk link Michael posted. I expect if you posted there you might also have chance to locate a replacement cross slide and possibly other accessories.

Steve

Jonny,

Have your exact model and machine number to hand and contact **LINK**. They will have the correct manual and may well be cheaper than lathes.co.uk.

The correct manuals are reasonably useful and should cover all your stated requirements.

Depending on the exact machine you have if it is the later type (12" wheel, and optional swing down internal grinder) there were factory collet options for 4C and 5C collets. The earlier type had a different collet type that I am not familiar with.

Steve

Edited By SteveI on 05/06/2018 20:13:18

Make that a +3. Didn't GHT himself write something along the lines that a "rotating center is an essential accessory for everyone that can afford it.". I would add to that by suggesting the word quality should be at the front.

I had a second hand Rohm center and after using it on a good lathe I noticed a visual striping in the finish. I then got lucky on a second hand female center gepy and the finish vanished. Later to banish a major milestone birthday blues I got a male center gepy and I have not regretted it. One thing to note the standard GEPY has quite a short stub on the end and does not eject on all tailstocks. They used to do a variant P/N that had a longer stub. I don't know if they still do. It is of course a simple matter to turn up a replacement as they simply screw in and out.

Steve

ebay.com and sellers from ukraine.