Well what I have in my mind is this, the pin has to be hard as it sits in a phosphor bronze bearing, if it wares fast it will transmit the wobble through the machined spur-gear and bearing carriers on that, like the old one did.
Its the one piece on this machine that takes the full force of the reciprocating action of the ram, I dont know the forces but they must be considerable to slice off .050 material over 6. The original plate and pin was constructed that the pin looked like it was probably pressed fitted in and from the back they had a flaring tool mushroom over the last 1/16 of the pin, they may have left the last part of the end soft.
If anyone owns a shaper they will know what I am talking about. What I was fishing for was does hardening warp or change dimensions, obviously I cant machine a hard surface so this is either made first then hardened or hardened and affixed to the plate. Either or any ideas would be welcome, as we all know there are ten ways to skin a cat.
Anthony.
F350
I just re-read your post. A dowel pin perpendicular to the spigot buried in the plate and bored through the pin sounds quite a good idea, then the question is the hole pre-bored through the pin before it was hardened is it still true to size? Although saying that slapping allot of locktite thread locker on the pin-hole and pin may hold it.
Anthony.
Its the one piece on this machine that takes the full force of the reciprocating action of the ram, I dont know the forces but they must be considerable to slice off .050 material over 6. The original plate and pin was constructed that the pin looked like it was probably pressed fitted in and from the back they had a flaring tool mushroom over the last 1/16 of the pin, they may have left the last part of the end soft.
If anyone owns a shaper they will know what I am talking about. What I was fishing for was does hardening warp or change dimensions, obviously I cant machine a hard surface so this is either made first then hardened or hardened and affixed to the plate. Either or any ideas would be welcome, as we all know there are ten ways to skin a cat.
Anthony.
F350
I just re-read your post. A dowel pin perpendicular to the spigot buried in the plate and bored through the pin sounds quite a good idea, then the question is the hole pre-bored through the pin before it was hardened is it still true to size? Although saying that slapping allot of locktite thread locker on the pin-hole and pin may hold it.
Anthony.
ieezitin, proud to be a member of MetalworkingFun Forum since Jan 2013.