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| fly cutter |
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| cidrontmg:
Hi Wongster, I grind my fly cutter bits freehand. Theyīre rather short pieces of 6x6 mm HSS, so I usually fix them to a lathe quick change tool holder first, to keep my fingers from burning instantly. And also to guide them better :thumbup: The fly cutter body is self made, from 25 mm steel bar, itīs 42 mm long. The shank is <16 mm, to go to a 16 mm ER25 collet. The "business end" Iīve ground according to Bogstandardīs sketches. Iīve tried other forms in the past, but this gives by far the smoothest surfaces. When grinding the tool form, keep a water cup near, and cool the bit often, if you use something similar to a tool holder to manipulate it. Itīs easy to burn the tip, when youīre not holding the bit directly in your fingers. Of course, in a pinch, you can hold the bit in the cutter itself when grinding. Mine is just rather small to hold, and a QC tool holder also has the advantage of flat surfaces to keep against the grinder table. :wave: |
| sportandmiah:
Bogstandard, Great pics and description, but I am confused as to what the top is. Is the top where the screws secure the tool? |
| cidrontmg:
Top is the surface that cuts. In Wongsterīs fly cutter picture, yes, thatīs where the securing screws are. In my cutter, the securing screws are on the other side, which is NOT a good construction, I know... :) (Iīll make another one of these days, but this thingy has worked quite ok also). |
| wongster:
Hi cidrontmg, Appreciate your reply. You folks seem to be able to grind the curves so smoothly freehand. I'll give it a go on my 1/4" (6.35mm) tool. I bought a Taiwanese grinder over the weekend. Still figuring out what mod should I do to allow setting the angle of the tool rest. May need to cut off the stud, leaving the bolt to hold the tool rest. With the stud in one of the slots of the tool rest and the bolt in another, I'm only able to move the tool rest closer or farther away from the wheel. The stud is the little red thing on the bottom slot right at the back: Don't know if the bolt alone will be strong enough to hold the tool rest if I cut off the stud. Regards, Wong |
| Davo J:
Bogstandard is no longer with us here on the forum, he left a while back. Most guys including myself take the tool rest off the grinder all together. It gives you more room and makes it easier to grind all types of angles free hand. Dave |
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