MFK 700 and guide bushings....

[fritter63]

I've been using my MFK 700 with a guide bushing lately for cutting inlays. More specifically, the White Inlay bit setwhiteside inlay bit .

The problem I noticed is that since the MFK 700 has a threaded base for the guide bushing, you don't have luxury of using the knurled ring to secure it.

That means it is darn near impossible to really seat the guide bushing nice and tight. There's simply nothing to get a grip on. You can't grip the guide itself, as that would mar the metal and ruin it's ability to follow a template.

Any pointers on how to deal with this?

For now I've been pressing two fingers against the inside of the bushing, but I wouldn't trust this hold for very long.

IDEA: put a threaded bolt through the opening with nuts on each side to grip the bushing by the inside and the end of the extrusion for tightening, then remove it to use the bushing.

 

[tjbnwi]

If the center hub does not rotate; cut a slot in the bottom face of it. Use a common screwdriver in the slot to tighten and loosen the bushing.

If the center hub does rotate; drill two holes across from each other in the plate, use an adjustable spanner wrench in the holes to tighten and loosen the bushing. You can fabricate your own spanner by drilling matched spaced holes in a square of hardwood. Drive roll/tension pins in the holes, this will be your "key" for the bushing. You can drill a center hole the size of the bushing hub, this will help align the key to the holes.

Tom

 

[fritter63]

Great ideas tom, thx

 

[Sparktrician]

If the need is just to keep the guide bushing tight, why not just use a drop or two of Loctite 242? 

 

[Len]

If the center hub does rotate; drill two holes across from each other in the plate, use an adjustable spanner wrench in the holes to tighten and loosen the bushing. You can fabricate your own spanner by drilling matched spaced holes in a square of hardwood. Drive roll/tension pins in the holes, this will be your "key" for the bushing. You can drill a center hole the size of the bushing hub, this will help align the key to the holes.

Tom

+1 on this idea.  Ingenious! Let us know what you wound up doing.

Len