This is the second time I've made one of these; the first time was for my own personal lathe, this time it was for a gentleman in town who saw mine and asked me if I could make him one as well. Here's the link: Cam Lock For My Emco Maximat V10 Metal Lathe Tail Stock
Difficulty Level (Easy, Medium, Hard, Insane):
Medium
Process:
This time, things went quite a bit quicker because I had already done up the prototype for my own lathe so I just pretty much took the measurements from my cam lock and duplicated it.
First, I turned down a 1" piece to about 7/8" diameter with an M8 x 1.25 thread to match the bolt, then I made a matching 1" piece with a 1.250" diameter that had a 7/8" bore to fit the female threaded part.
After that, I drilled a 5/16" hole across both pieces for the actual cam. Then I took a piece of 1/2" cold rolled steel and turned one side down to 5/16" and left the other side at 1/2". Next, I chucked up this piece in the 4-jaw and set it off-center by about 0.100" and very carefully turned the cam portion.
Then, I turned a 5 degree angle into the 1/2" end of the cam, drilled a hole and tapped it to accept the handle.
After that, I tied down the two concentric sleeves and drilled through the 5/16" hole into the tail stock and drilled all the way through so I could stick the cam through the tail stock, then through the concentric sleeves and lock it in place with a c-clip.
Last, I had to take a 1/2" piece of cold rolled steel, turn the handle down to 3/8", thread one end and turn a knob on the other hand.
All that was left to do was to heat up the parts and quench them in oil to give it a black patina and to protect it from rusting.
Pictures:
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| The original tail stock with the nut fastener |
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| The back side of the tail stock |
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| Turning the first piece of the concentric sleeves |
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| Tapping an M8 x 1.25mm thread |
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| Getting ready to part off the female threaded sleeve part |
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| The finished part |
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| Facing the second (outside) sleeve |
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| Drilling, then boring to size |
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| Test fitting the pieces |
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| Getting ready to turn down the cam |
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| Making a little groove for the c-clip |
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| Drilling the cross hole for the cam |
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| Drilling through the tail stock |
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| The two sleeves and the cam almost done |
Tools:
Metal lathe & accessories
Metal band saw
Materials:
3" of 1.250" cold rolled steel
12" of 1/2" cold rolled steel
Cost:
$0.00
Time:
8 hrs (would have been 6 if I had done some more measuring ahead of time)
Conclusion:
Here's the email I got from the gentleman:
Chris,
I just wanted to let you know I've had the opportunity to try the new tail stock modification and it's a real time saver.
Every now and again I'm looking for the wrench and realize I don't need it anymore.
Thanks a lot for helping me out on this.
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