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Workbench Creations is the place for conversation and discussion about do-it-yourself (DIY) projects. This DIY blog will feature projects completed by its owner as well as projects completed by other do-it-yourselfers. Workbench Creations is the place where DIYers can discuss ideas, learn about what others have done, and share their expertise.

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Del's Lathe Refurb' pt 2

Posted June 10, 2013 10:34 AM by user-deleted-1105

The lathe came without any change wheels or the bracket to attach them, and one of the odd things about the lathe is the lead screw runs back to front!
So winding the handle away from you winds the slide to the right.

Weird, but it simplifies the changewheel arrangement... no need for an extra gear to correct the rotation.

I bought a set of 7 gears from Ebay which happened to be the right bore, only cost me about £35 which is what a set of new plastic (spits on floor) ones would have cost.
I worked out the geometry by looking at pictures of my lathe on't web and making a try out from 1/4 MDF sheet... easy to cut (but it doesn't weld;) ).

The bits were fabricated from chuncks of carefully selected stuff from my junk box.
My welding was pretty rough to start with, but I got some practice in, and while I was at it I added some strengthening to the motor support bracket, which has stopped a good deal of vibration.
The pics pretty much tell the story. (see the MDF try out below)

I also bought 3 other gears of the same DP (diametral pitch) as the back gears which give a reduced speed.
I bought them on the off chance that 2 might work out to run on the same centres as the existing back gears. It didn't work out, but I can use one of them to replace one of the gears with stripped teeth, I'll still need to buy one new gear, but over all I diddn't loose on the deal.
That will be the next step of the refurb. Then I'll make a cover for the gears.
I've leared a lot making these bits and using the lathe...
Main thing I've learned is...
clonk
clonk
clonk
Is a bad thing
Del

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#1

Re: Del's Lathe Refurb' pt 2

06/10/2013 10:53 AM

At least that isn't a single phase motor being driven by a three phase inverter.

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#2
In reply to #1

Re: Del's Lathe Refurb' pt 2

06/10/2013 12:43 PM

I was going to use a squirrel cage motor... but Kris hid it
Del

(BTW... swarf tray from the 99p shop . Mind it was in the cookery ware department... dunno why )

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#3

Re: Del's Lathe Refurb' pt 2

06/10/2013 1:28 PM

Main thing I've learned is... clonk clonk clonk

Is a bad thing......

Unless you're using a hammer.

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#4
In reply to #3

Re: Del's Lathe Refurb Pt. 2

06/10/2013 3:19 PM

Yet hammers of assorted sizes are part of the primary tools found in any machinists tool set.

Calipers, Micrometers, Feeler gauges, Assorted tooling bits and cutters, Files, and Hammers.

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#5
In reply to #4

Re: Del's Lathe Refurb Pt. 2

06/11/2013 8:55 AM

(Vernier) calipers and micrometers are OK for hammering, but feelers are a bit light. Decent sized files are good. .

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#6

Re: Del's Lathe Refurb' pt 2

06/11/2013 11:14 AM

Nice!

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#7

Re: Del's Lathe Refurb' pt 2

06/13/2013 4:38 AM

So are the teeth no more missing the teeth missing? But I still see teeth missing teeth missing, which must mean that some teeth are as till missing teeth,

Am I missing something?


PS Nice job want one too!

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#8
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Re: Del's Lathe Refurb' pt 2

06/13/2013 1:06 PM

The back gearing still has missing teeth, but that doesn't stop the screw cutting change wheels working to link spindle to leadscrew. It just means I can't do it at low speed.
Fixing the back gears with their approx 4:1 redution is the next step in this project.
Mind I had an early Fathers day adventure today.
My daughter ran me out her her little van to collect a load of Yew for my bow making.
It'll take me a while to sort out this lot.

Del

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#10
In reply to #8

Re: Del's Lathe Refurb' pt 2

06/24/2015 4:57 PM

That may be just what yew need to replace the broken tooth gear. Just shape the new gear from a sufficient sized section of yew.

Sorry, I just could not resist. I might have a few usable suggestions for the gear issue though. There is a company here called Boston Gear. They make lots of gears in many sizes, styles, and materials. They might have a gear that could be used as is, or modified somewhat to work. Idea #2, Can you mold the existing gear, then modify the mold to compensate for the lost teeth, and then cast the new gear from aluminum or bronze? #3, using a drill press, drill a shallow depth hole directly in line with where the tooth belongs. Drive in a hard metal dowel that is longer than the height of the gear. Braze it in (if you can build the things that we have seen here, brazing is a walk in the park for you.) then shape the dowel to match the shape of the other teeth, finish with more build up of braze to complete the profile. Best wishes from here.

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#11
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Re: Del's Lathe Refurb' pt 2

06/25/2015 3:18 AM

All done cheers...

Del

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#9

Re: Del's Lathe Refurb' pt 2

06/13/2013 2:59 PM

Del, I think you would get better help from a machinist site like: http://www.chaski.org/homemachinist/

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