| The Roland EGX-300 Engraving machine I'm using has a hollow spindle, the cutters it uses are approx 100mm + long and when installed the shank protrudes through the top of the spindle.
Cutters are held by a lower collet fitted with a grub screw which clamps the shank of the cutter, there is also a small brass collar which attaches to the other end of the tool and is used as a depth stop to allow tools to be changed keeping their depth setting.
The problem is, the purpose made tools have a very long shank and are expensive at approx £25 + delivery for a 0.5mm carbide slot drill. I've now used a 1mm slot drill and it works great but I'm a little aprehensive about shelling out £25 for a tool which will break.
Could a longer shank be brazed onto a carbide cutter?
I'd have to source the rod the required diameter, 4.36mm or alternatively I guess I could use an old tool with a 4.36mm shaft.
Any advice on brazing carbide tools?
The load on the tool would be carried by the lower collet with the brazed on part purely as a means of attaching the depth stop collar.
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