I'm a complete noob, so please excuse my ignorance.
I purchased a Bison 4 Jaw combination chuck, plain back model 7-848-0800. I have a PM12x36GT lathe with a D1-4 spindle. I also purchased the 7-875-084 back plate.
However, now that they are here, I'm not sure how the back plate is supposed to mount to the chuck. The chuck has 6 mounting bolts and is tapped to receive the mounting bolts, but the back plate only has the three studs with no holes drilled to mount the plate to the chuck.
In looking at the markings on the back plate, it does appear to be the 7-875-084 and all of the images I can find online and in Bisons catalog show 3 mounting holes already drilled.
Am I supposed to finish the back plate by drilling the mounting holes or did I get the wrong part? I may be way too early in my machining education to try and accurately locate the points to drill mounting holes at this point in my learning experience.
I purchased a Bison 4 Jaw combination chuck, plain back model 7-848-0800. I have a PM12x36GT lathe with a D1-4 spindle. I also purchased the 7-875-084 back plate.
However, now that they are here, I'm not sure how the back plate is supposed to mount to the chuck. The chuck has 6 mounting bolts and is tapped to receive the mounting bolts, but the back plate only has the three studs with no holes drilled to mount the plate to the chuck.
In looking at the markings on the back plate, it does appear to be the 7-875-084 and all of the images I can find online and in Bisons catalog show 3 mounting holes already drilled.
Am I supposed to finish the back plate by drilling the mounting holes or did I get the wrong part? I may be way too early in my machining education to try and accurately locate the points to drill mounting holes at this point in my learning experience.