Froneck
Titanium
- Joined
- Dec 4, 2010
- Location
- McClure, PA 17059
I have another question (see post Diamond wheel mounting issue) about mounting a 1V1 Diamond wheel in my Darex drill grinder. I have 3 Darex drill grinders, one I purchased new from Darex with all the available drill size chucks and 2 from HGR cheap without the chucks. What I'm doing with 2 of them is my customer is requesting another type drill point that requires split pointing and negative rake grind. Darex grinder can do one and requires another set-up to do the other. The other side will only do point angle grind. So if I grind the point and split point on one grinder I can simply use the other grinder that is set-up for negative rake grind while the drill is still mounted in the chuck.Sorry for the long and boring story as to why multiple grinders, the 3rd is for larger than 3/4" drills.
OK back to the question. To grind negative rake I found it best to use 1V1 wheels. As per my other post I received suggestions on mounting the wheel and eventually was successful being it was a wheel problem. This wheel requires a bushing to mount 1.250 bore wheel to shaft that measures .6245" in addition a spaced to move the wheel 3/4" away from the spindle face. I have a one piece bushing/spacer in the lathe roughed to 1.29" and ID .61". Slightly under 3" major OD is parted to about 1" X about 1/4" wide. I can now surface both sides of the bushing/spacer. Being size was recommended in my other post what would be ideal bore size to fit .6245" spindle and OD to fit 1.250" wheel bore? BTW this wheel is a General Diamond Wheel made in USA so I don't think I will have wheel issues.
OK back to the question. To grind negative rake I found it best to use 1V1 wheels. As per my other post I received suggestions on mounting the wheel and eventually was successful being it was a wheel problem. This wheel requires a bushing to mount 1.250 bore wheel to shaft that measures .6245" in addition a spaced to move the wheel 3/4" away from the spindle face. I have a one piece bushing/spacer in the lathe roughed to 1.29" and ID .61". Slightly under 3" major OD is parted to about 1" X about 1/4" wide. I can now surface both sides of the bushing/spacer. Being size was recommended in my other post what would be ideal bore size to fit .6245" spindle and OD to fit 1.250" wheel bore? BTW this wheel is a General Diamond Wheel made in USA so I don't think I will have wheel issues.