Thread: Source of chuck back plates?

HI Rebo, For a start Welcome to the Forum. I am pretty sure Newmac Equipment sell them. You could also try Mick Moyles. The links are http://www.newmac.com.au/ and http://www.moyles.com.au/ . I got mine Overseas from Chronos Engineering Supplies,they had them on Ebay under Stores. The price however is normally the same from them direct. You could also try RDG Tools. The Links are http://www.chronos.ltd.uk/ and http://www.rdgtools.co.uk/ .
Try Searching for both 'back plate' and backplate. My backplate that I got is Steel (cnc machined). I have been told the cast backplates are better, because there is less chance of thread bruising. Treat a steel backplate right and you wont have a problem. I don't know if you are aware, but Boxfords have the same thread 11/2" - 8tpi.
All the Best steran50 Stewart

Have you considered buying a piece of Cast Iron and making it yourself.
A piece of Cast to suit a Hercus chuck should be under $20.

Been asking the same question-

Newmac - no go

Mick Moyles - helpful - from memory ~$80 for a partially machined plate (ie it has a thread but need to be fitted to the mandrel step and then when on the lathe, trued and finally fitted to the chuck)

LPR toolmakers have a casting listed on the web site - $54-00 (http://www.lprtoolmakers.com/index.p...97e34aab42c627) but you need to do all machining.

tried contacting Hercus by email but no response -

Now where can I get a piece of cast iron for $20-00 or is a weight disk suitable and does anyone have a couple they don't want?

regards

David (many project - no time )

I made one up using a 10lb weight disk.

The weights aren't thick enough for the task, so if you do go that way, you will need to make up a separate part to thread, and then insert that in to the machined weight disk. I did this with lock tite. Works well.

I was at Mick moyels about 18 months back and had a plate in my hand. He wanted $15.00 for it. I just didn't have the cash dollars me so put it back in the cabinet. It seems that Mick is cashing in on all of the referrals to his shop from these forums.

I have noticed this occurring over the past twelve months or so, which is why I now keep somewhat tight lipped about leads and contacts that I have acquired lately.

Shame.

Oh.... forgot to mention..... I have a few 10lb discs in the shed.
Seeing as I am now a fat and unfit lazy slob, I will not be in need of them.

If you pay postage, you are welcome to have one for your project. Be aware though, it is really dirty S#!t to machine.

Fossil

Originally Posted by HavinaGo

Now where can I get a piece of cast iron for $20-00 or is a weight disk suitable and does anyone have a couple they don't want?

Don't know if it helps but I ust found an invoice from Edcon Steel from October last year:

2 off 170mm x 30mm cast iron round $42 (plus a cutting charge of $13)

Of course, steel has probably gone up in the last 10 months.

HI, I checked Shaw Machinery at Lunchtime on the Net. They have Plain Cast ones, go to their Website and look under Tooling. The Link is http://www.shawmachinery.com.au/
All the Best steran50 Stewart

As always this place is amazing.

Fossil, Thanks for the information on disk thickness and the offer of a disk.

Given snowyskiesau price it is time to ring a few local suppliers - I'd subconsciously written off that option

Well a phone call to Springvale Steel resulted in a reference to Bohler at Dandenong which resulted in the following:

for 2 of 3D cast iron (I was told that is a fine grain machineable type) 140mm diameter, by 35, cut, pick up tomorrow -- $49.50!

Thanks guys

Many thanks Steran50. I had previously tried Newmac without success. They had plates for the 260 but not the 9". Both RDG and Chronos look very promising. One US source, www.tools4cheap.net was out of stock but otherwise appeared to have a wide range. The other, www.cdcotools.com had 5" semi-machined plates. Must admit I had forgotten that Boxford was another South Bend clone. Thanks again, most helpful. Good luck. Rebo.

Hi Pipeclay. Thanks for the comment. Right now this lathe is in the early stages of restoration and is not capable of thread cutting. No faceplate, no backgear, damaged bull gear. When completed, it will be a different story.

Rebo

Thanks Fossil, that's quite a neat idea to use a weight. Right now, the lathe is in the early stages of restoration, and is not capable of thread cutting.

Rebo.

Are you trying to source a Back Plate to suit a Chuck you allready have,if so it would seem very unlikely that you would find one with the correct mounting Spigot Diameter allready machined.

As usual, lots of great ideas and sources.

My offer;
I was in the similar position. I obtained a suitable nut locally, 1 1/2" 8tpi as I recall, but you need to check that, a piece of 1/2" steel plate, made it roughly round with the gas axe, but you could do that on the lathe too, drilled a centre hole in it, and welded the nut to the plate - Watch the distortion

Then I mounted it on the main spindle you may have to rebate the end ofthe nut so it doent bite into the spindle.

Then I machined it to suit, trued and enlarged the center hole, machined a rebate to fit the chuck presactly, banged a coupe of holes(4) in and away we went.

Couple of hours <$15. Nut was about $7.50.

Was a good exercise as I learnt a lot along the way about the lathe, especially marking out.

Love to hear some techniques for correctly and accurately marking out four holes to suit chuck mounting holes.

Anyway good luck

Ian

If the 4 holes are Equally spaced and not offset use the formula Sin 180/N X PCD,N= the No of holes.