Shave a bit here and there.

A friend of mine needed a bushing assembly for his street bike to be reduced in width by about 0.230″.  Having a 1930’s South Bend Lathe in my shop, I naturally said “come on over”.

My respect for machinists just went up a few notches (it was already high).  I’m also glad I got a 4 jaw chuck for the lathe instead of a 3 jaw.

4-jaw chucks allow you to hold irregular work and precisely center it. The process for doing so can be tedious, but it’s a good feeling when your indicator reads in at less than 0.001″ variance from side to side.

This little project was fun for a few reasons.  The assembly comes apart into several pieces.  The little ring has multiple inner diameters used for different things, so it needed to be machined carefully on both sides.  Holding small and irregular parts is a challenge.  But seeing it all come together was great.

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Cleaning our South Bend Model A Lathe

Cleaning our South Bend Model A Lathe

Our South Bend Model A Lathe was rather stiff when we started working with it but we have been cleaning it up a lot since then.  Now it is running very smoothly by hand – we still do not have it under power yet.

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WD-40 has been a great cleaning agent.  It cuts through old dried up oil really well.   There was a slight bit of rust on the ways, so we used some steel wool and very fine-grit  sandpaper (400 grit) to clean them up.

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Basically it boils down to a lot of time and “elbow grease”.  Thanks to Ezra, it is looking a lot nicer now.

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That is all for now!

 

 

 

A new chuck for the South Bend Model A Lathe

After we got the South Bend Model A lathe setup and started cleaning it up, we discovered that we needed quite a few different parts to make it complete.   One of these is a chuck.

I’ve heard it said that if you can only have a single chuck, make it a 4-jaw chuck.  So that is what we started with.

This is a Shars 6″ 4-jaw independent chuck from http://www.shars.com/product_categories/view/4111108/4Jaw_Independent_Chucks

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It came with a 1.5 x 8 threaded mounting plate.

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However, when we went to bolt them together, we discovered that the chuck didn’t fit the mounting plate!  How could that be?

A quick phone call to Shars cleared that up.  Apparently (this is common knowledge to machinists, but) we need to turn down the mounting plate to an exact fit.  This ensures that the chuck will run true on our lathe.

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But before we can do that, we need to wire up a motor, and get some tooling, and a tool post, etc…

That’s all for now!