Hi all,
I recently picked up a Taiwanese clone of a Rusnok milling machine, circa 1980s. Cool little mill, and everything seemed in order. The previous owner reported that the spindle possessed an R8 taper, and by all accounts that would seem correct, but I'm encountering a weird issue when trying to install R8 tooling.
Thinking it might be interference with the indexing screw, I removed the screw, only to find that the interference is happening on the rear bearing surface for the collets. As indicated in the first photo with an arrow, the diameter of the bearing section is a good bit too small to accept the back end of my collets. Thinking the collets might be the issue, I tried to install my jacobs chuck, again to no avail.
Third photo shows the depth to which a collet will seat before encountering the interference. Second picture shows the annoyingly-recessed 32mm spindle nut. I can only imagine the annoying wrench I'm going to have to make to loosen that.
Any ideas as to how to resolve this issue? Are there super short R8 collets I'm unaware of, or some other, very similar collet system perhaps?
Thanks in advance,
Max
I recently picked up a Taiwanese clone of a Rusnok milling machine, circa 1980s. Cool little mill, and everything seemed in order. The previous owner reported that the spindle possessed an R8 taper, and by all accounts that would seem correct, but I'm encountering a weird issue when trying to install R8 tooling.
Thinking it might be interference with the indexing screw, I removed the screw, only to find that the interference is happening on the rear bearing surface for the collets. As indicated in the first photo with an arrow, the diameter of the bearing section is a good bit too small to accept the back end of my collets. Thinking the collets might be the issue, I tried to install my jacobs chuck, again to no avail.
Third photo shows the depth to which a collet will seat before encountering the interference. Second picture shows the annoyingly-recessed 32mm spindle nut. I can only imagine the annoying wrench I'm going to have to make to loosen that.
Any ideas as to how to resolve this issue? Are there super short R8 collets I'm unaware of, or some other, very similar collet system perhaps?
Thanks in advance,
Max