American Type L (long-taper) noser. backing plate

[azzrock]

hi every one i need to get my hands on some
American Type L backing plate's
3 or maybe 4.
I have a brand new 3 jaw plus a 4 jaw to mount.
and a mate need some to.
i know i can get them from England for around $ 150 to$250
plus postage. $150 is not to bad but 250 seems steep.
If i cant get them cheaper ill have to make some.
does any body know a local supplier of maybe have
a few lying around?

where could i get my hands on the cast iron to make some.
about 200mm dia.

290760

from lathes uk
American Type L (long-taper) nose - this, for the benefit of readers unfamiliar with the world's first widely-adopted safety spindle fitting, consists of a large screwed ring (held captive on the spindle's tapered and keyed nose), with a matching thread taper in the chuck backplate

thanks
aaron

[welder]

Mick Moyles stocks them but seems to be out of stock.

Lathe Cucks (http://www.moyles.com.au/chuck1.html)

[azzrock]

thanks mate ill look into it

[PDW]

hi every one i need to get my hands on some
American Type L backing plate's
3 or maybe 4.
I have a brand new 3 jaw plus a 4 jaw to mount.
and a mate need some to.
i know i can get them from England for around $ 150 to$250
plus postage. $150 is not to bad but 250 seems steep.
If i cant get them cheaper ill have to make some.


I watched someone make one many years ago. Was a right prick of a job. I'd buy them if at all possible.

You could get the backing plates made as castings if you wanted to go down that path. Probably simpler than finding 8" round these days.

PDW

[azzrock]

ok thats interesting just thought the key way would be chalange.
not if i had a broach set
castings from where?
thanks aaron

[azzrock]

its just that we need at least 4. im not shore what the postage would be from the uk.
i wish i brought that broach set last week.
any way well see.
aaron

[thorens]

its just that we need at least 4. im not shore what the postage would be from the uk.
i wish i brought that broach set last week.
any way well see.
aaron

Hi aaron.
do you means the two set that was in the auction ?
Peter

[Combustor]

See if the local secondhand shop or garage sale will yield some barbell weights of suitable size. Have even seen them on the kerbside.
Combustor.

[azzrock]

Hi aaron.
do you means the two set that was in the auction ?
Peter
hi peter i do but didnt think it out that much .you were there?
where we chatting at the end??

[azzrock]

See if the local secondhand shop or garage sale will yield some barbell weights of suitable size. Have even seen them on the kerbside.
Combustor.

the ones ive seen would be to thin i think.
thanks for the tip
aaron.

[PDW]

ok thats interesting just thought the key way would be chalange.
not if i had a broach set
castings from where?
thanks aaron

A broach set might not help you a lot. That keyway is in a tapered bore. You'd have to make a custom guide bushing which isn't impossible I suppose when I think on it. Piece of cake on a vertical slotter of course.

Here's a couple references anyway.

Lathe Spindle Fittings Page 2 (http://www.lathes.co.uk/latheparts/page9.html)

lathe Backplate Fittings (http://www.lathes.co.uk/latheparts/page12.html)

WRT castings my local foundry would do them but as I don't know the mass I've no idea on the price. Probably at least $100 each though so if the freight isn't a killer, I'd buy at $150 each and think of getting the castings if the price got to $250 each. Like everything it's a tradeoff....

PDW

[PDW]

the ones ive seen would be to thin i think.
thanks for the tip
aaron.

Quite right. You need at least 75mm thick and I'd be unhappy with anything less than 90mm myself. Most of that is the boss of course which is why a casting is the way to go.

I have a few backplate castings floating about in the shed that I made for a 2 1/4-8 tpi threaded spindle nose and I was pretty generous on the material (friend had a foundry at the time), I'll go and see what I have WRT boss thickness etc.

PDW

[azzrock]

hi again its a funny set up. the key way is on the taper but doesn't run parallel to
the tapper.
it starts out at the tail stock end shallow and gets deeper as it movers backwards.
of course you know this all ready. I for some reason thought a tapered broach mandrel would be the go.
but any slotting operation would do the trick.
IF a blank is going to cost $100, buying them is a better use of my energy's.
last nigh i was trying to think up a plan for making them.
i couldn't reside when to cut the thread.
what sort of lathe do you have again pdw?
ah ps easy way to id cast iron in bar form?
aaron

[thorens]

hi peter i do but didnt think it out that much .you were there?
where we chatting at the end??

ah.
yes we did I think. I was bidding on the shaublin 102VM lathe .

regards
Peter

[Ueee]

Hi Aaron,
CDCO have them, less than $100 for an 8". Postage will be the killer. I wonder if Frank will surface freight them?
CDCO Machinery Corp. (http://www.cdcotools.com/)

Ew

[azzrock]

ok i have brand new chuck a 3 jaw bison.
its a little smaller than the others i have but i don't care because its brand new.
i thought this blank was cast so i spark tested it and what a fluke.
long yellow straws broken by star bursts.

well its a start maybe buy some more later on.
thanks for the tip
ew

w290912

[Grahame Collins]

This bloke may have something.
I have got a backing plate from him in the past.Not sure if what you want will be there but worth a look.

Very good to deal with.

Tools4cheap LLC Online Machine Shop Tooling Store: Lathe Tooling,Lathe Chucks ,Back Plates and Face Plates (http://www.tools4cheap.net/products.php?cat=15)

Grahame

[PDW]

I had a look at my spare casting collection over the w/end. The ones I had done for my old Smith-Drum lathe don't have enough metal to machine into an L-0 series back plate, so I can't offer you one. Means the pattern isn't suitable either.

As for foundry costs, it's based on weight of material plus setup cost plus whatever else they want to charge. A one-off (or 2 or 4) is always going to be expensive on a per-unit price. Buy 100 and the unit price improves. This is why, if freight cost can be managed, I suggest you buy them. I could easily make them as I've got the vertical slotter needed but I don't do work for 3rd parties as I don't have the time. If you were closer I'd let you use my slotter under supervision but - you're not.

Not sure what machining sequence I'd use. Probably rough machine & drill/bore to get rid of the bulk, set up again on the turned OD, finish bore again close to size, taper bore (or combine the 2), thread the OD then move to the slotter. Reason being, the slot is pretty loose in its requirements and doing it earlier gives you an interrupted cut on the internal boring operation.

I've got a Colchester Chipmaster with D1-3 spindle and 3 other lathes, none of them L series. I do have an P-B L-00 collet chuck I'm going to butcher and fit to my Monarch CY one of these days.

PDW

[azzrock]

pdw thanks again for your offers and you incite regarding the lathe backing plates. very helpful.

you see i have 1 backing plate now and i was thinking of trying to buy some of these that popoed up on the ebay
thread.
Faceplate Backing Plate Blank Metal Lathe Milling | eBay (http://www.ebay.com.au/itm/FAceplate-backing-plate-blank-metal-lathe-milling-/300981307439?_trksid=p2047675.l2557&ssPageName=STRK%3AMEWNX%3AIT&nma=true&si=LedFSOjYsgfD1nbDkCxH%252BmGuoEc%253D&orig_cvip=true&rt=nc)
besides that i can still ring mick mollies and a few others.
aaron

[matthew_g]

ok thats interesting just thought the key way would be chalange.
not if i had a broach set
castings from where?
thanks aaron

Do you have a shaper? If you do the keyway is the least of your worries.. If you
get stuck I can lend you a broach, I have every size up to 1". And bushes to match.
Although as stated above you would need to make a custom bush.

Matt

[azzrock]

hi matt thanks for the offer very kind of you. i was just ebaying broaches then.
i may have to make bush to suit
.i don't have a shaper.yet

i was just running thru which order to do the cuts in.
maybe hold the blank in a 3 jaw and bore out to minor dia.
of the tapper.
then reverse the plate and hold it internally with the 3 jaw
machine the boss side down to size and cut the tread.
take a small cut on the outer dia of the backing plate.
reverse it again and then bore the tapper.
cut the key.
mount the plate on the spindle and face off ready to mount
chuck.
any way its been a while since ive had a multi steep job.
shouldn't be hard its just a backing plate.
aaron

[azzrock]

hi all i all ready knew there were different grades of cast iron but untill playing around recently
with differant types of cast i had no idea just how differant they could be.
can some one tell me please ideally wich grade of cast iron is suited to lathe backing plates?
im guessing its the softer type.

[pipeclay]

4 e

[azzrock]

thanks pipe clay. ill just goggle that now to find out more
aaron