My Clock Build Project Thread

[devils4ever]

Yeah, it's been a journey!!!

 

[devils4ever]

Remade the hub in brass to match the escape wheel.

Used my spoke cutting jig instead of the 3 jaw chuck.


Hub mounted on arbor and escape wheel.

 

[devils4ever]

Time to make the ratchet. The ratchet allows the barrel to be turned to power the clock with either a spring or weight. A click engages the teeth.

This time using 7075 aluminum. It has 36 teeth and a 60 degree included angle.

I was thinking how to make this part with the angle. Then, I realized I could use a dovetail cutter which has the 60 degree angle.

Blank cut in the dividing head a dovetail cutter.






Finished part.

 

[devils4ever]

I got some time to continue work on my clock project. This time working on the barrel, barrel cap, and ratchet.

I had to open up the 1/4" hole to 1/2" on the ratchet. Here I'm using my newly acquired coaxial indicator to align the center with the spindle.


Using my rotary table to drill and countersink holes for mounting the ratchet to the barrel.


Same operation for the barrel cap.


Drilling and tapping (using my mini tap handle al a Joe Pi) the barrel for 4-40 screws.


Finished pieces.


Assembled.

 

[devils4ever]

Been busy at work, but had a little time to get the great wheel/ratchet arbor done. I used 1/2" W1 steel rod and put a 5/16" hex on the end for winding. The tool steel is not fun to turn on my mini-lathe.

Turning between centers for concentricity.


Cutting the hex on the end using my hex collet block.


Completed piece.

 

[verbotenwhisky]

Yes, after I get it to tick tock, I plan on hardening it. That's why I used 4140.

I've never heat treated anything before. Will a Bernzomatic propane torch get it hot enough? Quench in oil? Water?

I would suggest a torch running LP or Acetylene and oxygen with a rose bud. At the end of the day the addition of oxygen to the mix will bring it to temperature faster with less gas and effort.

 

[verbotenwhisky]

I finished the hub to attach to the escape wheel. As always, the simplest seeming thing takes hours. Just to drill the holes took well over an hour to make sure everything would align.

Tapping a 2-56 thread.
View attachment 430559

Drilling the three holes that mate with the escape wheel.
View attachment 430560

Finished hub.
View attachment 430562

Hub mounted to escape wheel.
View attachment 430563

Beautiful work.

 

[devils4ever]

I would suggest a torch running LP or Acetylene and oxygen with a rose bud. At the end of the day the addition of oxygen to the mix will bring it to temperature faster with less gas and effort.

I was hoping MAPP.

 

[verbotenwhisky]

I was hoping MAPP.

MAPP and LP and Butane will all work, without O2 though it requires more time and gas. you have to impart a certain number of BTU into the work piece and overcome the losses at the same time. Oxygen will increase the efficiency of your gas allowing you to impart more BTU faster and reduce the losses.

 

[7milesup]

I can't imagine that little part needing an oxy-acetylene setup. If it were me, I would use MAPP.