Hi Guys,
Well after playing about with my machinists level and needing to make a knurled knob to adjust it with, I only had a bump knurler, which I'm anything but happy with using due to the great strain it puts on the lathe spindle. I decided that I ought to do something about that. So I've spent a few hours in the workshop making a pinch or clamp knurling tool. Here is the finished product. It is all made from scrap that was in the bin. The only bits that were not are the knurling wheels that came from the bump knurler and some 1/4" diameter silver steel used to make the hinge pins. The adjusting knob was knurled using the finished knurler. I just used a nut as a temporary adjuster.
The arms are 20 X 10 X 75 mm flat bar, drilled and reamed 1/4". The support plate is 60 X 30 X 6 mm plate. All the screws and threaded rod are M6. The brass adjusting knob is 30 X 15 mm with the bottom tapered so that the knurled edge is 10 mm wide. The two round bits of bar are 10 mm diameter by 20 mm long. The M6 threaded rod is locktighted into the lower piece of round bar threaded through the middle M6. I used two M6 cap screws to secure the holding bar that fits into the lathe tool holder. The slots in the ends of the arms were cut with a suitable slitting saw.
Well after playing about with my machinists level and needing to make a knurled knob to adjust it with, I only had a bump knurler, which I'm anything but happy with using due to the great strain it puts on the lathe spindle. I decided that I ought to do something about that. So I've spent a few hours in the workshop making a pinch or clamp knurling tool. Here is the finished product. It is all made from scrap that was in the bin. The only bits that were not are the knurling wheels that came from the bump knurler and some 1/4" diameter silver steel used to make the hinge pins. The adjusting knob was knurled using the finished knurler. I just used a nut as a temporary adjuster.
The arms are 20 X 10 X 75 mm flat bar, drilled and reamed 1/4". The support plate is 60 X 30 X 6 mm plate. All the screws and threaded rod are M6. The brass adjusting knob is 30 X 15 mm with the bottom tapered so that the knurled edge is 10 mm wide. The two round bits of bar are 10 mm diameter by 20 mm long. The M6 threaded rod is locktighted into the lower piece of round bar threaded through the middle M6. I used two M6 cap screws to secure the holding bar that fits into the lathe tool holder. The slots in the ends of the arms were cut with a suitable slitting saw.
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