On Tuesday, February 01, 2011 04:30:13 pm Steve Blackmore did opine: > On Tue, 1 Feb 2011 11:56:16 -0500, you wrote: > >quality of the shaft and its bearings its turning in. The dremel with > >its rubber mounted output shaft, even on the cable driven hand piece, > >would be an absolute disaster. I can remember the first dremel I ever > >wore out back in the 50's while building a 15 second 1/4 mile flathead > >49 Mercury engine, the cutter wheel chuck was rigidly mounted to the > >motor armature and one could to .001" accuracy by hand with it. > >Todays version may have 3x the motor power, but it also has a chuck > >running in its own rubber mounted bearings that can be pushed .020" in > >any direction by hand. No way in hell can you carve a PCB trace that > >is truly precise with that, and it amazes me that folks even try. > > You guys must have different Dremels over your side of the pond :) I > have a Dremel Professional 398 and the shaft is rigid. Well, as rigid as > you can get roller bearings in a plastic case, I know that's true as I > replaced the bearings a while ago. > > Steve Blackmore > -- > Possibly Steve. I have at least every other higher end dremel ever sold around these parts, but have never seen a Model 398. B&D makes a 3 speed for about a $40 bill that is better, but its output shaft is also rather spongily mounted.
I have purchased another z casting for my micro-mill, with has a nominally 1 and 15/16" bore for the quill to travel in, and have been unable to determine if its worth the effort and $140 for a Proxxon because even the peddlers who advertise it cannot tell me if the chuck is rigidly attached to the motor armature, or runs in its own bearings with some sort of a self aligning coupling to the motor shaft. As all such tools sold on this side of the pond seem to be. The other possibility might be a trim router, but I haven't found one that is small yet although the Dewalt comes pretty close. The rotozips, at least with their skin on, also look to be too large. That leaves sawing off the end of the casting and fabricating a new mount. an enticing thought IF I could find (or make) an emc controllable gimble mount to allow something like the Proxxon to have the motions that Stuarts new toy has. That sort of a capability would be better spent building something like Marks machine because I would want to carve gunstocks with it. With the gimbled Z axis, I could reach into the thumbholes and carve those quite precisely. Yeah, I dream a lot. :) -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) <http://tinyurl.com/ddg5bz> Your computer account is overdrawn. Please reauthorize. ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
