Re: [CAD_CAM_EDM_DRO] Helical Couplings

Hmmmmm....I was thinking along the lines of possibly making something
similar but cutting a helical slot using the lathe.

Smoke

>
>Hi Bill,
>
>if you're willing to use strait slit couplings instead of the helical type
>you could build a full set of your own on a mill cheaper than buying ONE of
>the commercial couplings
>
>mount a short bar of material vertically in a vise with a V-block
>
>find center and drill/ream thru the length of the coupling + some extra
>
>use a thin slitting saw (~.025) to slice off the top for a new Z zero
>move down the thickness of the hub and start
>cutting slits 2/3 thru the material about .050 apart like so
>view from top
>1st cut [0 deg]
> <-
> O
>2nd cut [180 deg]
> O
> ->
>3rd cut [90 deg]
> O ^
> |
>4th cut [270 deg]
> | O
> v
>
>repeat for 5th to 8th cuts to make 2 full sets of slits
>
>move down another hub thickness and "part off" with the saw
>
>drill & tap the hubs for set screws or get fancy and
>slit the hubs for the clamp on style mounting
>
>the slit type couplings are not as strong as the helical type so make them
>bigger in diameter if you have room to mount them
>
>Brian
>