Results 41 to 44 of 44
02-17-2017, 10:21 AM #41
Heat would be a factor if making burns all over one side of a part..likely that would cause stress in compression and draw the part to wish to relax in concave shape over time..so a softer wheel or disk the better choice.
On the other hand if the part was full of stress then cool grinding one side might relieve surface stress and make it wish to go the other way,.
Guess one would have to deal with change if it comes.
Demon73 liked this post
02-17-2017, 02:26 PM #42
That one is the plate that can be seen as the top part of the box way for the ram on this picture of the same type of shaper that I've linked to from Tony's site:-
It is in contact with the ram as it moves back and forth, so must have flatness and bearing suitable for a sliding surface. But in this case, an even better finish is needed initially, since the only way to adjust the fit of this type of way is to remove metal from the mounting face of the main casting until the cover plate can pick up blue from the ram surface (or vice versa) or to remove metal from the ram (or the bottome face that the ram rides on), if one has gone too far. Thus, the plate is being used as a master to check the ways fit. Obviously, the straight edge and surface plate are used to maintain flatness when scraping the main casting or the ram, but the plate is needed as a transfer once the clearance is less than the 1.5 thou that can be judged with feeler gauges.
A good fit is needed, since on a heavy cut, the ram can be pushed up by the tool and any clearance will produce chatter and/or inaccuracy.
challenger liked this post
02-17-2017, 04:55 PM #43
Thanks for the explanation.
Galaxy S4, Slimkat
If I wasn't married I'd quit fishing
02-18-2017, 02:29 AM #44
Beliefs are far more powerful than any angle grinder, we should use them with great care
Ive an 18" x 18" surface plate coming my way soon that i plan to use as a granite lap. With a bit of luck itll be well wonky, we can have a carve up with a grinder and see whats really what