02-28-2024, 02:21 PM
(02-28-2024, 11:55 AM)EdK Wrote: I always wondered if a hacksaw blade would make a usable parting tool.
Ed
It does, but you do have to be careful, not just using it but setting it up ! No heavy cuts, just gently as she goes.
The blade must be dead square to the work, I use the face of the chuck to ensure that it is. Also it should be dead on height or at most a thou or two below center when cutting from the back side, conversely above center if cutting from the front.
The reason that I limited the stick out to 5 mm was because of the blade flexibility. However as the cut gets deeper the blade will tend to twist and shatter unless the teeth are properly ground off. This also means that when grinding off the teeth the blade has to be kept as cool as possible so that the blade doesn't get annealed by getting too hot.
This is also the reason that I limited the extension steps to 5 mm. I've successfully parted 20 mm diameter in EN1. In the drawing I also included the blade tip angles that I've used.