2016 POTD Thread Archive

I used to burn up Chinese hss on the mill, when I use carbide they last alot longer, my bad boy aluminum end mills are still factory like sharp, even had one weld itself with chips, my fault I turned my back for half a second after starting the program, I heard the noise change and I was like Wtf yikes stop stop stop, lol, it was literally melting it's way through the alum, but I broke the goober outta the flutes and it cut like a dream. Not sure what, happened, but it only happened that one time. Maybe it grabbed some chips in a corner that didn't fling out.
 
since i don't really need an all out ball turner I came up with this...since I already have my top axis removed and plate for the quick disconnect . (i don't do much tapers) And it is plenty sturdy I added another hole for a 1/2 pin with a allen on the side to lock it in...as soon as i get the parts made for another project on my mill i will drill 4 holes in the blocks for clamping the bit in place..
I can get almost a 2" piece in there but will be used for 1" and below mostly.

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JimDawson said:
Not really the project of the day, more like the project of the last 4 days. I needed to get my CNC software compatible with Win7 - 10 so I started from scratch on Friday and did a complete rewrite in .net, while simultaneously learning a new programming language. Nothing like a project to learn something new. Four days of marathon programming and about 10,000 lines of code later it's ready to put on a machine and see what doesn't work. It works on the desktop, but I expect a few days of debug on the machine. I'm going to test it on Alloy's Shizouka AN6 that is sitting in my shop and has Win8 installed.
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Good grief almighty! That's an amazingly complex project to hear about (my own forays into programming never got beyond Fortran or, more recently, ladder logic). I laud and applaud your success.
 
chevydyl said:
that looks like a pretty hefty gear blank, what are the specs on diameter and width? (im not a gear guy)
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I am not a gear guy either this is going to be the second gear that I've made, the last one was in 1975 lol
5-1/2" in diameter, 2" gear width, 1/2" collar, I posted info in post #6756
 
I didn't think I'd be in the garage this afternoon, setup the mill and centered the cutter using Mr. Pete 222's method of centering. I modified it by using 2 pieces of HSS blanks instead of 1, my very last piece of Top paper, and the centering function on the DRO
Tubal Cain Mr. Pete222 demo in YouTube Shop Tips # 198

The cutter is 3" in diameter 4DP a #6 (of set of 8) to cut 17-20 teeth. The width of the cutter is just over 3/4"

centering cutter to arbor.JPG Involute cutter centered on key way.JPGSeems to be centered to the arbor
 
ive done one gear myself, I milled it on my cnc mill, cutting the gear face up on the end of a piece of bar, basically profile milled it just to see if I could do it. its limited and larger gears are possible, its the smaller ones that are difficult to make out of harder materials.
 
I bought an older Jacobs 14N Super Chuck off of Ebay a few years ago. The chuck was in great shape with virtually no wear, but wow was it hard to turn: very gritty. I finally decided to pull it apart and clean it.

This forum thread was very helpful:

http://www.hobby-machinist.com/threads/jacobs-14n-super-chuck-repair.22027/

I made some custom arbor spacers on the lathe so the actual chuck disassembly was quite easy. My press, Big Orange, had no trouble separating the chuck parts.

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I forgot to take a picture with the jaws & balls removed, but here you can still see that the factory grease had turned into the consistency of dried-out ear wax. Yum! It's a wonder it would open and close it at all.

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And here we are after a few hours in the parts cleaning can, some wire brushing and all the parts ready to go back together. The forum thread I mentioned above provides all the information you need to get the jaws back in the right place.

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Now the chuck's all cleaned-up and back together, just like a new one and ready for some heavy drilling in the mill. It works so much easier now it's a pleasure to use.
 
Unloaded a huge drill press the SIL brought home from work. The company surplused the press and was going to send it to the scrap yard. Even though it has a bad motor the SIL intervened. The hydraulics on my tractor are set at somewhat low pressure and I could barely lift the machine after removing the motor, coolant pump and 3/4" 20" X 20" work plate on the table.
Didn't see a brand name on the drill press but it has a 2hp 3 phase motor, a screw jack supported table, about a 2.5" quill and a power down feed arrangement. Machinist at the shop told SIL "it will drill a hole in anything you want, but slowly". Project for when summer gets here.
Have a good day!
Ray
 
rock_breaker said:
Unloaded a huge drill press the SIL brought home from work. The company surplused the press and was going to send it to the scrap yard. Even though it has a bad motor the SIL intervened. The hydraulics on my tractor are set at somewhat low pressure and I could barely lift the machine after removing the motor, coolant pump and 3/4" 20" X 20" work plate on the table.
Didn't see a brand name on the drill press but it has a 2hp 3 phase motor, a screw jack supported table, about a 2.5" quill and a power down feed arrangement. Machinist at the shop told SIL "it will drill a hole in anything you want, but slowly". Project for when summer gets here.
Have a good day!
Ray
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Pictures, or it didn't happen! :)
 
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