... posted: 7 Jan 2019 05:48 from: Andrew Barrowman Dave, Here's a sample of PETG. Some of you might recognize this as a Tri-ang two-start worm and worm wheel. I just replicated the worm wheel on my printer. Obviously the hole in the center is a mess. I'll need to fiddle with temperatures and flow-rates to get it right, but the tooth definition is remarkably good. The surface is also very hard and should withstand a fair bit of use. Cheers, Andy 2983_070036_150000000.jpg madscientist wrote: Have you considered PETG, it's strong but has some flexibility, or perhaps FPE, of which I have no experience but the specs look good Dave posted: 8 Jan 2019 06:35 from: Andrew Barrowman The reason I'm messing about with printed gears is slightly obscure. I'm converting a Hornby tender drive Duchess to four-wheel-drive. The leading and trailing drivers will be gear driven from a rather large motor in the tender and the Duchess will be filled with lead However, all this messing ...