Made a thin bushing

[arizonian]

Originally Posted by toprecycler

Well, the screw was to have both pitch of threads. I will get to try again.


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Practice, practice, practice...

I think Lew had it right, a differential screw for very fine adjustments.

[toprecycler]

Making a new bolt for granite saw at second job. They called and said they’ve been having problems with the bolt loosening up when they start the machine.

I’m still puzzled as to why it is starting to loosen itself, but after 15-20 years of use, the bolt is quite sloppy in motor arbor. It’s pitch diameter is measuring about .015” under size. And I assume the motor arbor probably is worn too. So after talking with the boss, we was going to check on buying a replacement bolt, but figured it probably would be better, but still sloppy, I said I could make a new one. And I would oversize it, and try to make it fit as it should. Down side, is it may take a couple tries to get it right. Trial and error.

I made it .010” over the basic pitch diameter and went to the shop to try it. It screwed in about 2 threads before it stopped. So I have takened it back home and took a couple more light passes off. Will test fit it again tomorrow. Maybe I’ll get lucky this time.

I also cleaned up the faces of the spacer washer. And on one side, I cut a groove in it to hold an oring to act as an lock ring. It should help keep pressure on the bolt.

I did this because I did something similar on my lathe cross dial. The thumb screw would loosen up when I used the rapid traverse motor due to the quick starts and stops. And then the dial would spin, and I would lose the accuracy of knowing where the tool was for the next cut. I added a oring, and now it stays tight, til I loosen it. I had also made it bigger so it was easier to tighten with two fingers.


Anyways, the thread is 36mm, x 4mm pitch. Left hand thread. I had to change a gear to get my lathe set up to cut this thread. Learned something today.








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[Scotts]

That looks really good.

Scott

[digr]

I like the O ring idea.

[arizonian]

Left hand threads will mess with your head until you've done a few of them.

[toprecycler]

Made a coolant drill guide . I took a piece of aluminum and thru drilled the size of the drill, and then counter bored the next size up on the side where I want the coolant to come out toward the work piece. Drilled a hole coolant tube and then small hole with a set screw to hold the coolant line into the block.

I then threaded at 5/16 -18 thread on the backside to be able to put a piece of threaded rod in hold to the magnetic stand.

I needed to drill a 15/64” hole 10” deep into the end of this chrome cylinder rod. The coolant worked great, kept the drill bit cool and work piece didn’t get real hot and by using the air drill on the compound and the lathe chuck turning as normal, the drill tends to self correct it self and drill straight down the rod center. Before when just holding the drill bit in tailstock chuck, the hole would wander off center the deeper I go. Not good when you need to drill a cross hole to meet up with center hole.

I had to pull drill out about every .200” to clear the flutes. I left the coolant block about an inch away from the rod, and the coolant would flush the flutes clean. And the block helped keep the drill aligned when reentering the hole.

When done drilling, the drill bit was cold to the touch, and the rod was just slightly warmer than ambient temp.





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[Ironman]

That's a great idea, Brian.

[toprecycler]

So I had a project slightly out of my normal material. Lexan plastic guards for a Jar pusher arm I made a year and half ago for a local food manufacturer.

The matainance man and I collaborated on the design to push a row of jars just filled and capped into a cooling tunnel where they are sprayed with water to cool off so they can be labeled and boxed up.

Had a couple mods to get it working the way they needed, and was time to make a guard so Osha would not question possible pinch points.

It was to be a simple sheet over entire arm setup, but his son who just took over for his just now retired dad, had other thoughts though on the design. Which complicated things for me.

But it came together. It was a bit tricky cutting and bending each guard in only two pieces, along with some aluminum angle support pieces. But between 20 ton press with metal forming dies, my pan finger brake, and brake parts I made for my arbor press, I managed.

I remade one piece, because I came up with a better looking solution. If I wanted to do them again, I could make them a bit more nicer looking, but the maintenance supervisor is happy. Now to figure out the bill. If only I could feel ok with billing all the time I had trial and error, I could be rich. But I need to keep it reasonable so future jobs come my way.

It’s because of this company projects for me that has allowed my shop expansion with lathes, mills, and grinders last couple years, gearing up for my retirement shop.

Amazing how big of a mess I can make doing a project. I did manage to get most of bench cleared back off, in prep for some carts I need to make for other job.











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[toprecycler]

I made this press brake dies out of wood for my arbor press. I thought it would be strong enough for the lexan sheet, but the bottom die part was not.

But, for bending small thin pieces of metal, it would be fine. I used ash wood, that I got from a friend that been drying for about 10 years. I wish I had pieces thicker than 1” for some projects.









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[Lew Hartswick]

Originally Posted by toprecycler

I used ash wood, that I got from a friend that been drying for about 10 years. I wish I had pieces thicker than 1” for some projects.
k

I wish I could hand you a few of the 2" Ash planks I have here that have been siting under the shelter on the north side for over 20 years. They came from my brother-in-laws place in Ohio. I used most of the 1" stuff when I made new cabinet doors for all the kitchen and drawers etc for both bathrooms. Never found a good use for the 2" ones. :-)
...lew...