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Light lathe work Calgary

  • Thread starter Thread starter Kelly
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Kelly

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I am looking for a few small pieces to be fabricated on a lathe and small welding:
  • approx. 1 3/4" x 3/8" round brass drive cam threaded to match spindle below
  • approx. 1 1/4" x 3/8" threaded steel spindle, to be welded to existing dial
  • approx. 1/2" x 1/16" spline key to tie the above pieces together
I have the original pieces for accurate measuring and can provide the entire assembly as well.
The machine shops I have contacted are not interested in such a small job.
Please reply to: [email protected]
 
Janger said:
Did anybody answer Kelly?
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no replies yet, the item I am restoring to working order is likely between 50 to 70 years old and considered vintage. I think anyone who works on this restoration would be impressed by the mechanism. I can't find an identical item to this one anywhere, only later models.
 
Kelly please post a couple more times and then I think you can upload some pictures of what you need. That always helps.
 
Thank you for your advice. I have made a couple of pictures with text to assist here. For some background history, I have been moving this item around with me since childhood in the US where it was found by my brother when he was a child also. Some very crude attempts to repair it were made back in the early 70's. I have been exhaustingly researching to determine year of manufacture but have not been able to date it yet. I have found a few advertisements for this item in Popular Mechanics magazine from 1948 so it could be from that time period. Serial numbers are tough to figure out unless you know the manufacturer scheme but mine is 43073. It is highly unlikely that is the number of units made. It is possible that 43 represents the year and 073 either the unit number that year or the Julian date which would have been March 14, 1943.
I don't seem to be authorized to add the pictures (2) so I might need some help with that aspect.
 
You must post no less than 3 times before the picture posting achievement is unlocked, once you post enough times you will be automatically informed of this. Welcome to the group, post away!
 
I guess this post will make 4 so should satisfy the posting numbers for photos. As I have only posted as a guest looking for assistance, does this still qualify? Will wait for the auto-reply and then post the pics if allowed.
Thank you
 
If you can attach as guest there will be a button at the bottom of a reply entry saying "Attach Files". I'm not positive guests can do that. If you can't then send me a private message and I'll post.

1588534222587.png
 
Thanks but there is not an option to 'Attach files' for me. I also don't know have your email address to send a private message with pics. My address is [email protected]
Thanks
Janger said:
If you can attach as guest there will be a button at the bottom of a reply entry saying "Attach Files". I'm not positive guests can do that. If you can't then send me a private message and I'll post.

View attachment 8872
Click to expand...
 
So the material is steel? The repair was attempted by brazing? The threaded shaft with the key way is steel as well?

the flanged part should look like this: threaded boss with three key ways at 120* to each other inside of it?

1C272E74-2C64-41C2-AE62-AD2A2208D16E.jpeg


from the original, I looks like the failure point was the stress risers caused by the key ways cut into the threaded boss and the very thin section left at the bottom of the slot to the outside wall (very thin wall). Any chance that the boss could be made with a larger OD (for added strength)?
 
So 1 part is a round disk with 10 threaded holes, but not a bolt pattern, with a key cut. It has a hole in the middle with three small splines cut into it.

Second part is a threaded hollow shaft that has three groves cut in it to accept the internal spline from above part.

Parts are tiny, round disk has diameter of just 1.5" or so. Thus the holes are very small, maybe 8 or 6 number screw - thus precision here to position them has to be high.

Could one maybe cheat a bit and re-use the old cam by drilling the center hole bigger and re-engineering the shaft?

Making this thing would not be easy - its tiny and only some things are symmetric.
 
Sorry everyone looks like I messed up and missed one of the pictures. I fixed it above please have a look for part 2.
 
I asked Kelly for more pictures too.

Could the two parts be replaced with one? No splines no threads no keyways. It depends on what else these parts interface with I guess.
 
@Janger, looks like the shaft has only the one key way and thus you could rotate the "cam" to three different locations and I guess slightly different depth, the key being the lock to keep the threaded shaft in one of 3 positions. Ten holes to accommodate machine screws at different angles to the notch in the cam. Looks like an 11th hole would be centre of the cam so holes are 360/11=32.73 degrees apart? interesting... In @RobinHood s blow up it looks like there is a recess just below the phillips head screw - set screw?
 
spindle part should not be that hard to replicate - as long as precise measurements can be taken. Still few hours of work - if all goes well.

The flange part looks a bit harder - you need internal spines cut, exact measurements may not be possible, the 10 holes are not evenly distributed - maybe it is 11 bolt pattern but 1 hole is not made? Probably a day worth of work if all goes well - a longer day.
 
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