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Hi Craig If you would click on the link it will explain a lot. I can measure to the 0.0001” of a 5/8” hole with a snap gauge. My reamed 5/8” hole is 0.6256”. If you look at the second column you will see that a 5/8” reamed hole is allowed to be 0.0007” over sized and still meet the H7...

I redid the file with more realistic sizing. Here is a treasure trove of information. Tim

I has the hammer and plans I will see what mine look like. Tim

Here is a list of fits that Solidworks came up with. s6 shaft size is the maximum recommended for cast iron wheels. Reamers are allowed to produce an oversized hole and still be in limit. Tim

These are 4-1/8” cast iron wheels on steel axles for 1/8 scale model trains. They don’t transmit power so no key. Tim

What would the proper machined size for a shaft that will be pressed into a 5/8” reamed hole in a cast iron wheel that you want to stay put? I know about Loctite but I am interested in press fits. Thanks Tim Meyer

Does anyone else on this board have Fibromyalgia? How does it affect your shop time. I can work for 30 minutes and sometimes a hour but then I need to rest for two hours. It is taking me forever to get anything done. I stopped working on the big Mikado and am working on a mid size stationary...

What type of casting kits are you looking for? Steam or internal combustion? I have some old Stuart kits that I am selling. I can look at my list and see what I have. Tim

I am so saddened by your loss. Tim

I have all 6 of the half balls cut. 3 of them have these 0.0225" holes for stop wire loops to keep the balls from going too far out. Tim

I think it will work. They will be installed with rivets. Tim

I need 3ea. 1/16” steel or iron rivets 7/16” or longer. Head style doesn’t matter. I will take 25 of them so I can practice. Thanks Tim

I am working on the half balls. Luckily the DRO has tool offsets that I was able to set for each tool. I made one without taking into account the thickness of the cutoff tool. But after that they are looking good. Tim

The bottom is stationary held down by a collar that uses a 00-90 screw to hold it in place. The top moves down and pushes on a 1/32” shaft that is in the middle of the spindle. This operates the valve. The half balls are 3/8” steel that I will be working on next. I purchased a form tool to...

I made a fixture to stamp out the governor springs out of 0.002” feeler gauge. I need to finish deburring them and make a few more for spares. They are held on with 0-80 screws. I also need to make the special washers that go under the screw head. I have to figure out how to make the half ball...

I am still making parts for the governor. The next item I will be making are the 3 springs that go between the top and bottom. They are made from 0.002” feeler gauge. I will make a fixture to make them so the hole spacing will be the same between the 3 of them. Tim

I was thinking of using 5C emergency collets as well. I am wondering where I can find the correct size stainless steel for the 2-56, 6-32 and 8-32 studs. Or should I plan on turning it to size ? Tim

The upper a lower governor flanges are almost done. Once the 1/8” lathe mandrel shows up I need to take 0.005” off the upper face of the top Flange. The one on the right. Tim

I am in Winter Haven, FL Between Tampa and Orlando.

I need some 3/8” soft mild steel balls for the big Tangye governor. Does anyone have a dozen that they do not need? I don’t feel like buying 350 of them. Tim