Recent content by maury

Y'all, I would NEVER buy a casting set without the drawings unless I already had them. Also beware of missing parts. maury

Gordon, I don't know how a home made demand valve would work. I use one I bought for use in a truck. I use a BBQ grill regulator to lower the pressure in front of the demand valve. You need to change your thinking about how a mixer/carb works with a demand valve. If you are having trouble, the...

I have an X45 converted CNC machine, and have Serious backlash. After having investigated the cause, I have come to the conclusion I need to replace the ball screws and and thrust bearings. The current ball screws are too small for that machine, and are worn. The thrust bearings are cheap ball...

It's sold. maury

Mohavegun, I have a complete Holt 75 kit, includes prints and optional gear set. Will sell for $600 + $35 for US lower 48 shipping. Thank, maury

Dale, I have a crankcase and a set of prints. If interested, email me at [email protected] maury

Send me a PM, I don't think it's a good idea to post third party information. maury

sunworksco, there are many art foundries around.They make jewelry using investment casting. If you can't find one, I can get you the name of a few here in the great state of Texas. All you will need is a phone call and a USPS flat rate box.Almost all art foundries cast stainless steel, and the...

Jerom, have you found any castings & parts for the Holt? I have some, if interested, email me at [email protected] Thanks, maury

Jims, not bad for a first try. A few hints: the pock marks are from dirt washing into the mold, either because the sand was not tight enough or it didn't have enough binder, or it could be from turbliance in the mold from the metal washing the sand loose. On your next flywheel you might try...

JimShop, can you give us more info? I don't like your sand, but it might work. What does your pattern look like? gating, risers? Aluminum needs risers! also, does your gating minimize turbulance in the mold? Post some pictures of your parts and the patterns. maury

Rodue, very nice build. Also, I see you have it running well too. It's really rewarding for me to see another of my old casting kits completed. Keep up the good work maury www.lonestarengineworks.com

FOURSTROKE, a couple of things. First, Very nicely Done! The castings look great and it looks like you are modeling castings everywhere it is possible to within reason. This will be a big plus on the final model, and the looks will give the appearance of the original. Second, it is quite...

Tom, if you are using a demand regulator the pressure will be atmospheric at the mixer. You will only get gas into the mixer when there is a vaccuum pulled in the mixer on the intake stroke. By the way, this is the safest way I know to use propane on a model. If you do not use a demand regulator...

Hi, When I started cutting gears on a mill, I used a Phase2 spin index, made appropriate arbors for the gears. I used a large diameter piece of drill rod and turned down the end to a snug fit for the hub. Use a thick washer and a screw to hold it tightly in the arbor. This worked ok for gears up...