There is a product called "Cyanopoxy" that is like a two-part "super glue" that can bond slippery plastics like delrin and molded nylon that should work. It is fairly expensive, though. I haven't used it myself, but I've read about it in the model railroad hobby press. -----Original Message----- From: Tony Duell [mailto:ard@p850ug1.demon.co.uk] Sent: Thursday, July 17, 2003 5:51 PM To: cctalk(a)classiccmp.org Subject: Re: plotter <snip> I've not found anything that will reliably stick to the plastic for said pinion. 2-pack epoxy resin adhesives (Araldite, etc) certainly don't. And no common plastic solvent disolves that plastic either. <snip> -tony