Lathe change

Model Engineering in UK - Model engineering, metal crafts in UK 

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Subject Author Date
Lathe change Bill 09-04-2008
Posted by Austin Shackles on September 5, 2008, 9:42 am
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On or around Fri, 05 Sep 2008 11:26:07 +0100, Peter Fairbrother

>Austin Shackles wrote:
>> On or around Thu, 04 Sep 2008 23:46:53 +0100, Mark Rand
>>
>>>
>>>> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>>> of changing it but with what ? About same size but with gear box and cross
>>>> feed, also would like to take bigger cuts. Any suggestions welcome
>>>>
>>> In order of likelyhood:-
>>>
>>> Boxford AUD
>>> Colchester Student
>>> Colchester Bantam
>>> Super 7B with cross feed
>>> Conny Sewer
>>> Hardinge HLV(-H if you can get it))
>>
>> Harrison L5?
>>
>> Colchester Chipmaster, if you can find a good'un, especially if the variator
>> works. In fact, unless it's been rebuilt with a variable speed motor, it's
>> essential that the variator works. very nice little lathe though, if in
>> working order.
>>
>> The student is a bit big, compared with a Myford.
>
>They are *all* a bit big compared with a Myford. A Myford will fit
>comfortably on a tabletop - the rest won't.

then again, most come with a nice solid stand, which is good.

The boxfords, unless they're UD models, aren't necessarily on stands.

I guess you could unbolt the student from it's stand/cabinet and put it on a
table, if you had a strong enough table.

The chipmaster is only 3x20, but it's well solid.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------
>> http://www.schlockmercenary.com/ << ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Posted by Peter Neill on September 5, 2008, 10:13 am
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On Fri, 05 Sep 2008 14:42:05 +0100, Austin Shackles

>
>The chipmaster is only 3x20, but it's well solid.

I think you made a typo there<g>, as I'm sure it's 5.75" x 20", same
as the Bantam.

Peter

Posted by Austin Shackles on September 6, 2008, 5:35 am
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On or around Fri, 05 Sep 2008 15:13:37 +0100, Peter Neill

>On Fri, 05 Sep 2008 14:42:05 +0100, Austin Shackles
>
>>
>>The chipmaster is only 3x20, but it's well solid.
>
>I think you made a typo there<g>, as I'm sure it's 5.75" x 20", same
>as the Bantam.

yeah. 5x20. it says so on the machine, chances are it'll go a tad over 5.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140264039299

for example, although I'd be a bit wary of a noisy variator, although the
advice give in the excellent lathes.co.uk
(http://www.lathes.co.uk/chipmaster/) is a touch contradictory on this point
- untoward noises are bad but they are "rarely silent".

He goes on to suggest that they mostly end up being converted to electronic,
and further describes someone who over-rated one to run at 4000 rpm.

--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------
>> http://www.schlockmercenary.com/ << ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Posted by Charles Ping on September 6, 2008, 6:27 am
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On Sat, 06 Sep 2008 10:35:29 +0100, Austin Shackles

>On or around Fri, 05 Sep 2008 15:13:37 +0100, Peter Neill
>
>>On Fri, 05 Sep 2008 14:42:05 +0100, Austin Shackles
>>
>>>
>>>The chipmaster is only 3x20, but it's well solid.
>>
>>I think you made a typo there<g>, as I'm sure it's 5.75" x 20", same
>>as the Bantam.
>
>yeah. 5x20. it says so on the machine, chances are it'll go a tad over 5.
>
>http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140264039299
>
>for example, although I'd be a bit wary of a noisy variator, although the
>advice give in the excellent lathes.co.uk
>(http://www.lathes.co.uk/chipmaster/) is a touch contradictory on this point
>- untoward noises are bad but they are "rarely silent".
>
>He goes on to suggest that they mostly end up being converted to electronic,
>and further describes someone who over-rated one to run at 4000 rpm.


Aisde from being well made the Chipmaster has a good reduction from a
back gear so a modern VFD works OK when the variator gives up. I've
known it be done and work well although how good it'll be at 100rpm
big cuts is open to debate - but if you're used to a Myford then it's
a hypothetical worry

Charles

Posted by Mark Rand on September 5, 2008, 2:11 pm
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wrote:

>Austin Shackles wrote:
>> On or around Thu, 04 Sep 2008 23:46:53 +0100, Mark Rand
>>
>>>
>>>> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>>> of changing it but with what ? About same size but with gear box and cross
>>>> feed, also would like to take bigger cuts. Any suggestions welcome
>>>>
>>> In order of likelyhood:-
>>>
>>> Boxford AUD
>>> Colchester Student
>>> Colchester Bantam
>>> Super 7B with cross feed
>>> Conny Sewer
>>> Hardinge HLV(-H if you can get it))
>>
>> Harrison L5?
>>
>> Colchester Chipmaster, if you can find a good'un, especially if the variator
>> works. In fact, unless it's been rebuilt with a variable speed motor, it's
>> essential that the variator works. very nice little lathe though, if in
>> working order.
>>
>> The student is a bit big, compared with a Myford.
>
>They are *all* a bit big compared with a Myford. A Myford will fit
>comfortably on a tabletop - the rest won't.
>
>-- Peter Fairbrother


My sense of proportion might by slightly skewed by the fact that I migrated
from my short bed ML7 to ex-father's long bed 7B (that he claimed to have
bought for my 9th birthday :).

Having fitted it to a stand, the other lathes _are_ bigger than it. But not
necessarily vastly so.

Case in point. The long bed ML7B is 24"x55" on its stand, the Hardinge HLV is
8" longer and 5" deeper. The reason for suggesting the "upgrade" is that the
Myford weight in at 5cwt and the HLV tips the scales at half a long ton.
Similarly with other "small industrial" lathes. That weight difference can
make a big difference to the amount of swarf that you can produce in an
evening.

If one were really stuck on the concept of small enough to live on the table,
then a gearbox and power crossfeed would be gilding the lily and wouldn't fit
the last desire to take bigger cuts.

Mark Rand
RTFM

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