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Wondering if any of you guys have experience with this? I'm curious exactly how the clamping action takes place.
Nelson

Nelson- that is the same unit that you often see advertised in woodworking catalogs as the "Eliminator." It is just a split collet tightened with an allen wrench. It is 1/2 inch and you can get an accessory 1/4 collet adaptor. I have one on my PC 890 and it works well. The instructions do mention some possibility of vibration from runout, but mine spins smooth as ever. They are also available for other brand routers. Minimizes cussing when changing bits, especially in a table.

Looks like it would be an advantage on a CNC machine in that a bit with a stop collar could be inserted to the same "length" during a tool change. This doesn't work well with a conventional collet as the collet is pulling into the taper as it is tightened.

Thanks for you feedback, Mike.
Nelson

Nelson the one thing that would worry me is that appears the adapter tightens the grip from one side. If this is the case how does this maintain the collet concentric with the motor shaft. A nuted collet tightens concentrically by squeezing the collet around a 360 surface. Even a 5 point set screw setup is no guaranty of concentric fit.

Just my opinion based on no experience with one

Eliminator
Mike and Michael
Is the Eliminator different than the Magnate? The Eliminator appears to be a collet arrangement perhaps actuated by the screw(?)

I just went down to my basement and looked. The collet has three slits, so, I would say it is probably at least as concentric as a typical three jaw lathe chuck-not as precise as a four jaw set with a good indicator, but sufficient. Of course, I have to claim that I have the good sense not to check runout at 20K rpm so I can only attest to static runout.

I've been thinking about buying the 3 1/4 HP Porter Cable to replace the Bosch 1617EVS on my CNC and this quick change would be a real plus. The Bosch is a very nice unit but could use the extra HP when roughing maple. I'm guessing the PC also has larger bearings judging by it's larger body size.
Mike--So is yours the Eliminator or the Magnate? I'm curious how the screw tightens the collet. An eccentric or taper on the screw perhaps?
Wonder what the spiral groove is for on the Magnate?
Nelson

[QUOTE=Miketobey] I just went down to my basement and looked. The collet has three slits, so, I would say it is probably at least as concentric as a typical three jaw lathe chuck-not as precise as a four jaw set with a good indicator, but sufficient. Of course, I have to claim that I have the good sense not to check runout at 20K rpm so I can only attest to static runout.[/QUOTE]

The thing here is that both a 3 jaw and 4 jaw a Lathe chuck is designed to allow the machinist to index the part into center. How do you index in a router bit. You don't. You depend on the bit being in balance and the collet being concentric.MichaelP38727.3969560185