Gallery, Projects and General > Project Logs
Making a Rotary Table
NormanV:
I made a drilling jig out of a piece of scrap steel to ensure that the jig, the plates and the mounting boss on the rotary table all agree.
NormanV:
I turned the two plates to thickness, bored them and then drilled for the mounting screw. I only drilled one hole as I thought that would be sufficient but have now decided to drill the second hole to ensure the plate mounts square.
NormanV:
I then machined the casting for the jig, it was a terrible casting with a large shrink cavity but it was good enough for the jig. All I had to do to it was turn both sides and bore it for a stepped locating pin to go through the centre.
The pin had three steps 16mm to fit the hole in the centre of the rotary table, 20mm to fit the hole through the jig and 24mm which is the hole size in the centre of the plates. I made the pin a press fit in the casting, I had a bit of trouble pressing it in due to the shrink cavity in the casting, it picked up an edge and pushed the pin off centre. I had to knock it out and file the offending part, it then pressed in fine. I used the template to drill the mounting holes for the plates and was pleased to find that the plate will fit on using either screw hole in the jig.
NormanV:
I then mounted the jig in the four jaw chuck, fitted the plates in turn and turned the outside diameter.
Tomorrow I will mount the jig on the rotary table and set it up for drilling the rings of holes.
As a bynote: I have read in some forums people stating that they only ever use their three jaw chuck. I seem to have to swap from 3 jaw to 4 jaw, and change the jaws from inside to outside on a daily basis. Is this unusual?
mattinker:
Usually, when I need the four jaw chuck the three jaw is mounted and the jaws in the four jaw are the wrong way round! People who only use the three jaw work exclusively on round things!
I'm still enjoying this thread!
Regards, Matthew
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version