by DManley » Thu Jul 10, 2014 3:41 pm
This is great information, and great questions! I am just starting with the brass chassis building questions myself. I posted about solder a few weeks ago, and I am just cutting and mocking up my first creations. I have experience building other things, so I have some tools and some of my skills should port over. I have also built slotcars from plastic and fiberglass before. I have even built some from aluminum channel for 1/24 scale bodies back in the '90s.
In my limited experience, I agree on the Rotary tools. Variable speed and quality count. There are a few good brands out there. Anything that is on sale for $29.99 at a big box store isn't going to last very long or work very well cutting brass. As soon as the tool gets even a little bit wobbly, it becomes useless for making precise cuts, and won't ever leave a clean, straight, smooth edge or surface again. (Knowledge gained from years of flying model aircraft and racing RC cars, as well as static models)
Luckily, I have been collecting files, sanding sticks, dental picks, rasps, rifflers, nippers, pliers, mini vises, paint brushes, forceps, tweezers, reamers, 3rd hand tools, scissors, and the like for well over 30 years now, plus I am a third generation tool hound. If I need it, I have it (But I might not be able to find it.) I will probably just start building with what I have, and if there is something I really need, I will buy it. Otherwise, I will just set up a small caddy to hold the tools I end up using the most and keep them near me while I work.
As for generic parts, I do see some motors being sold on Ebay for a good bit less than the name brand ones. I think Lakota has some cheap ones, BWA/Dart has NC-1 and Narrow motors for $5.00 a piece. Professor Motor had some cheaper ones IIRC, but I don't see them on the website right now. I bought a couple of bags of Motors from Slot Car World back in the day, with my Artin track. I am down to my last few, and looking for another large batch. One thing I have never been able to deal with is gears. For me, gears are the most expensive part of revamping old cars, or scratchbuilding cars. I have cut bushings from plastic or metal. I have cut axles from music wire and I have even made my own wheels on a metal lathe. Drill bit blanks can be purchased from material supply places like McMaster Carr or Travers, Guides and braid can be found in slightly cheaper form by shopping around on the net, but I have not found any really killer deals yet. (Although 1 meter package of braid will do a lot of slot cars for four bucks.)
If I really wanted to build on the cheap, I would consider TSRF's idea for the guide. They just use a fixed pin, and fixed braid on either side of it. No moving parts. Just take a stainless pin of some type (or a piece of piano wire of the appropriate diameter) and fix it to the chassis. Then wrap two pieces of braid around the front edge of the chassis. Instant poor man's guide. (WARNING! if you use this method, check your track to make sure that the pin does not rub the edge of the track braid or the rail while sitting in the guide. If the opening between the track rails or track braid is not wider than the slot, you will have shorting issues. Then you would need to fabricate a plastic guide flag.) If the metal pin won't work on your track, them make a fixed guide flag out of a thin piece of narrow plastic. (Maybe Delrin or UHMW types of plastic. Maybe even polycarbonate or Lexan?) If the flag was short enough from front to back, the fixed flag should negotiate the tightest corners, but if you slide out too much, it will snag up, and it won't last as long as a moving guide. ANOTHER WARNING! If you do this, with a pin or a short plastic guide, you need to keep the braids very short. If the braids can touch each other, they will! You will then owe the track owner a fuse.
Tires are pretty easy to cast, but the initial investment is going to be a hundred bucks or so. I cast my own, and it saves quite a bit of money because I run on one really abrasive track (Grip paint) and I shred them like nobody's business. Mostly I cast them because I like making my own tires, and I can make them in any size, shape, compound or color I want whenever I want to.
Good luck, and I will be watching this thread.
Dave