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Any interest in shop made tools?

3149 Views 65 Replies 11 Participants Last post by  govmule84
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Automotive tire Machine tool Gas Engineering Machine

So I got tired of swinging the lead hammer while truing flywheels and came up with a couple of special tools to help make it more of a finesse operation. They seem to be working pretty well so far. I've done a few sets of wheels with them and haven't broken one yet. I get the wheels to within a couple of thousandths with the hammer, and then use these for fine tuning. Pics should be self explanatory. Feel free to copy if you want.
Gas Machine Metal Engineering Auto part

Table Wood Tool Hardwood Wood stain
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Product Automotive tire Metalworking Engineering Machine tool

So, the case half replacement saga continues, and since this is the 3rd time this year that I have need to deck motor mounts on cases (2 broken mounts previously and now this one) it seems like time to make a up some more tooling. Always before I've set them up the traditional way with setup blocks, machinists jacks, and angle plates and gone the fiddly route with indicators and adjustments to get them in position prior to machining. If it's something that is going to be a common job for me, I believe it's worth the time to make a dedicated fixture to streamline the job next time. [Hide and watch, I'll never have to deck another set of mounts after making this one.] I started with a chunk of aluminum left over from another job. Squared the sides and then set it up at 22 degrees 30 minutes angle (Edit: This figure is incorrect, but I'll leave it here as evidence, LOL. Read my next post below for correct angle and reason for angle being stated incorrectly here if you are looking for accurate info or to duplicate this tool.)with the sine bar and gauge blocks. Milled the surface for the case to seat against, drilled the bolt patter and counter bored for bolt heads. Easy but time consuming work. Spent a day but it should save several hours of finicky set up time each time I need to do this type of job.
Engineering Gas Machine Electronic engineering Machine tool

Circuit component Engineering Computer hardware Gas Electronic engineering
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Slicker than a snotty doorknob!
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So this morning I double checked my work on the case holding fixture and found out that I had made a glaring error. I bolted the case to the fixture, clamped the fixture to the bed of the mill, and started measuring to verify that it was going to work. I found that there was significantly less than 2 inches of vertical difference between the front and rear mount surfaces, and the surfaces were not setting horizontal front/rear. Digging deeper, I found that I had assumed that the 45 degree angle between the cylinders was evenly split along a center line that was perpendicular to the plane of the engine mounts, and this is definitely not the case.:unsure: I went to my archives :ROFLMAO: , dug out an old engine blueprint, and started cypherin' . Come to find out the center line of the V is canted forward 2 1/2 degrees relative to the horizontal established by the motor mount surfaces. (Sometimes being a pack rat comes in handy.)
Glasses Office supplies Font Wood Clock

This means that the angle needs to be 20 degrees for the tool to hold the case in the correct position when mounted to the rear cylinder mount surface. Time to do some more cutting.
Engineering Gas Auto part Machine Mass production

Got the angle corrected and trued up the mounts. If my math is correct it will need .032 shims under the front and back motor mounts to make everything line up just right when it's installed. As long as the frame is straight anyway.
Automotive design Motor vehicle Engineering Gas Automotive exterior
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Who'da tunk?
Who'da tunk?
Well, I'm sure it's been figured out by many folks over the years, and it's probably written down in shop note books all over the world, but I've never seen it called out specifically on a public forum. To me the real value of the internet is sharing information, so I did. I get a lot of use from info that others have posted here and elsewhere, and I think it's only right to repay at least some of that if I can.
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^^^Model post
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