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Old 04-07-2017, 07:29 AM   #1
bazmak
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Default BAZMAK a second Lathe

When I first joined this forum I bought a 7x16 mini lathe.Paid approx. $1200
for an improved spec.Metal gears,tailstock camlok etc.Over a period of time
I did most of the major mods and threaded them.I was very happy with the lathe until the board blew and i then upgraded to the SC4 which I am happy with
However I miss certain functions of the smaller lathe.The tumbler reverse gears
to disconnect or reverse the leadscrew.The ability to pick it up and move it around without bolting down etc etc
When rearranging my tiny shed I realised I had room for a second lathe 7x14
I ordered the cheapest one I could find $630,plastic gears but had a tailstock camlok,a 4" chuck which I assumed was an 80mm and a 550w motor,so I ordered one with the intension of doing a no of mods before I put it to use
Second time around should be quicker and more efficient.I have learned a lot since my first one.
So I made the mods to one end of the shed and built a 10" wide bench and drawers.Lathe arrived today,order took 3 days.Packed in heavy duty cardboard boxes and at first inspection looks ok.Took off the old plug and fitted an ozzie one.Everything as stated,with the 4" chuck and a 72mm spindle housing.Wasnt expecting that,now all my chucks will fit both lathes
Had the lathe running and only problem so far is when the speed dial is
rotated to 0 it still keeps turning slightly.Any advice.This will keep me interested in Life for a while.Nice to be able to strip down and still have a lathe and mill for making parts Click image for larger version

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Old 04-07-2017, 10:25 AM   #2
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Baz, I presume that both machines have mainly interchangeable bits. I've got Myfords and whilst they are not quite everyone's ideas of perfection, I can swop between both and also so called 'Myford' fittings on my mill and grinders.

It's quite ancient and not really worth much in terms of 'investment' but it works well.

Regards

Norman


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Old 04-07-2017, 01:54 PM   #3
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Yes that's why I bought the cheapest I could find,most parts fit both lathes
so no need to pay for extras,and I wanted to fully mod it at leisure
What blissit on its new bench then pick it up,turn around and place it on my workbench,and I have a lathe and mill to use while I mod it at my leisure
Unusual in that the first 7" lathe had a 55mm spindle nose and I had a 3Jaw
and collet chuck to fit mu rotary table and indexing head.But the lathe has a 4" 3jaw with 72mm spindle the same as the C4 so everything fits.I am also going
to buy the QCTP for it as I have not ever had one.Money saved on the lathe
buys it.Ready to rock
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Old 04-07-2017, 02:54 PM   #4
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Hi Barry- I'll not be the only one who will look forward to your future exploits.

As for QCTP's , I have two and should never look a pair of gift horses in the mouth.

I suspect that I will be offered a second hand 7 x in the near future. Really, I must Metricate or whatever it is called as it is far cheaper to buy petrified stuff here now.

Yesterday, I came home with a subtable so that I could transfer Imperial stuff onto my 'terrified' mill drill.

I've gone Apple and now hope that some kind offspring will teach me how to post or whatever the latest buzz word describes it

Happy Easter everyone.

Norm
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Old 04-07-2017, 06:50 PM   #5
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Quote:
Originally Posted by bazmak View Post
Yes that's why I bought the cheapest I could find,most parts fit both lathes

so no need to pay for extras,and I wanted to fully mod it at leisure

What blissit on its new bench then pick it up,turn around and place it on my workbench,and I have a lathe and mill to use while I mod it at my leisure

Unusual in that the first 7" lathe had a 55mm spindle nose and I had a 3Jaw

and collet chuck to fit mu rotary table and indexing head.But the lathe has a 4" 3jaw with 72mm spindle the same as the C4 so everything fits.I am also going

to buy the QCTP for it as I have not ever had one.Money saved on the lathe

buys it.Ready to rock

Sounds like a good move for extending your shop capacity. These 7x Lathes often end up serving needs similar to watch makers lathes that where common in hobby shops at one time. That is a small lathe to handle delicate stuff.

As for the QCTP try to find one suitable for both lathes if you can. The idea being to be able to use holders on both lathes. Do be aware of a possible negative here, which is the lack of stiffness in these small QCTP. A DIY design might make sense.
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Old 04-07-2017, 11:32 PM   #6
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Looks great Baz. Where did you buy it from?
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Old 04-08-2017, 12:03 AM   #7
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The 250-000 QCTP will fit both your machines, however not available in Aus can be obtained from Arc Euro in England or LMS in the US.

Barry
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Old 04-08-2017, 04:00 AM   #8
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Multiple lathes hmmm ... one day. Looks like a fun little project.
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Old 04-08-2017, 06:41 AM   #9
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Herbie I bought the lathe on Ebay from amazing items Search metal lathe
and you see lots of blue ones $660 free postage or $610 with $50 postage
Lots of supplies,came from Sydney made an offers and finished at $630
Well I stripped down the carriage.No nasty surprises.Castings were good
No fiiler to hidden areas but there again no paint.Lots of sharp edges.Deburred
and cleaned up .Carriage ways were finished well so fixed wet and dry and
polished/bedded in the carriage.First job was new gib plates,the supplied ones were all loose and the lathe would have been unworkable
When I modded the original 7x16 I played with adjusting the existing plts
No good,so I made new ones beefier from brass and mounted with studs
big improvement but then did the tapered gib mod.The Bees Knees
The rear gib is the most important as the cutting action tries to lift the carriage
Lots of room so I made the tapered gib mod
The front gib is more congested and is not as important as the cutting forces
push the carriage down on to the ways and a couple of thou play is ok
so I made a heavier gib plate machined down to give 2 thou play which I can shim if required.The carriage is now nice and solid and free,if need be I
may bed down with lapping paste.Its just a question of how far to go
I am doing this mainly for the exercise don't know how much use
I will get out of the lathe.Thoughts so far.The lathe is everything I expected
from the cheapest version I could find,but would not be satisfactory for
anyone who is prepared some time and effort in improving/modding
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Old 04-08-2017, 09:22 AM   #10
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Looks good Baz, I forget how clean my lathe was before I started to actually use it!

Quote:
Originally Posted by joco-nz View Post
Multiple lathes hmmm ... one day. Looks like a fun little project.
Nah, build your own CNC one. I know you want to and so do you!


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