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Think I need a set of soft jaws to hold the rollers for the plasma table, I've never used them. Today we made a set.
1 inch thick, 2 inch deep and 5 inches long
![[Image: IMG_0948.jpg]](https://lh4.googleusercontent.com/-U15xijXRRZE/UrY3u8TSlXI/AAAAAAAABy0/BYt-1CBYABk/s1280/IMG_0948.jpg)
Need to pick up 3 - 1 inch by 1/2 cap screws the existing jaws use a long and short one. The chuck is a Bison made in Europe, would have expected metric fasteners, the dimensions were even inch. Who'd a thought.
![[Image: IMG_0951.jpg]](https://lh5.googleusercontent.com/-Iqut95gXGFM/UrY3v3OT7tI/AAAAAAAABy8/GS5a3hzIHmw/s1280/IMG_0951.jpg)
Free advice is worth exactly what you payed for it.
Greg
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Greg, I venture that a quality manufacturer like Bison would manufacture to the system used by the country they are exporting to , maybe? 
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.
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The following 1 user Likes racer-john's post:
EdK (12-22-2013)
The last two days I have made nothing, but I have read all the pages of this topic.
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Waste-oil heaters are banned in Ontario.
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racer-john, proud to be a member of MetalworkingFun Forum since Dec 2013.
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Today I made the blank for the 70 tooth gear I need. I found a 130mm piece of unknown steel, something that was at one time an arbor for testing spindle runout on some machine. It's soft enough that my bandsaw was able to cut through it and when I went at it with carbide insert tooling on the lathe it machined just like 1018 CRS.
I got the 126mm O.D., the 11mm width, the 0.9mm x 60mm boss and the 20mm bore done. Now I've got to figure out a good way to broach the 6mm keyway. The piece is still sitting in the chuck of the lathe, so if anyone has a good idea I'm listening. My first thought is for me to take a 1/4" square HSS tool bit and grind the tip of it to 6mm, then mount it in a homemade boring bar I have to holds 1/4 tools, center it (somehow) and take a lot of .001/.002" passes on it with the spindle locked. Centering would be the hard part. Got ideas?
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Ken,
It would be much easier to slot the keyway on the mill. Just grind a slotting tool the slightly less than the width of the keyway and mount it in a collet. Then you can move the table to center it up, feed it and offset it the required amount to accurately size the width of the keyway (easier than grinding it right to size)
Tom
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Racer-John,
You read the entire project thread?! No wonder it took two days.
You may want to meander on over to the introduction thread and tell us a bit about yourself. Most everyone will see that post, but they may not see this one.
Oh, and you may want to be prepared to offer pics of your projects or machines...I'm just sayin. 
Tom
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(12-22-2013, 08:39 PM)PixMan Wrote: Today I made the blank for the 70 tooth gear I need. I found a 130mm piece of unknown steel, something that was at one time an arbor for testing spindle runout on some machine. It's soft enough that my bandsaw was able to cut through it and when I went at it with carbide insert tooling on the lathe it machined just like 1018 CRS.
I got the 126mm O.D., the 11mm width, the 0.9mm x 60mm boss and the 20mm bore done. Now I've got to figure out a good way to broach the 6mm keyway. The piece is still sitting in the chuck of the lathe, so if anyone has a good idea I'm listening. My first thought is for me to take a 1/4" square HSS tool bit and grind the tip of it to 6mm, then mount it in a homemade boring bar I have to holds 1/4 tools, center it (somehow) and take a lot of .001/.002" passes on it with the spindle locked. Centering would be the hard part. Got ideas?
Ken,
Couldn't use scribe a centerline on the tool and set in your toolpost?
To get it nearly exact, place a tool you know is on center in your tool post, then use it to scribe a line the face of the gear using your cross slide (spindle stopped of course). Place your gear cutting tool in the tool post and match up the scribed lines.
Just be sure to NOT move the chuck during any of the process.
Now.....why can't you mill the teeth in your mill?
Program it, go have a beer or two or three, and by the time you come back it may be done!
Merry Christmas!
Russ
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I didn't make anything to-day, but I did read all the pages here. Some very talented folks about.
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They are banned in Ontario.
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racer-john, proud to be a member of MetalworkingFun Forum since Dec 2013.
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12-22-2013, 09:03 PM
(This post was last modified: 12-22-2013, 09:05 PM by wrustle.)
(12-22-2013, 09:01 PM)wrustle Wrote: (12-22-2013, 08:39 PM)PixMan Wrote: Today I made the blank for the 70 tooth gear I need. I found a 130mm piece of unknown steel, something that was at one time an arbor for testing spindle runout on some machine. It's soft enough that my bandsaw was able to cut through it and when I went at it with carbide insert tooling on the lathe it machined just like 1018 CRS.
I got the 126mm O.D., the 11mm width, the 0.9mm x 60mm boss and the 20mm bore done. Now I've got to figure out a good way to broach the 6mm keyway. The piece is still sitting in the chuck of the lathe, so if anyone has a good idea I'm listening. My first thought is for me to take a 1/4" square HSS tool bit and grind the tip of it to 6mm, then mount it in a homemade boring bar I have to holds 1/4 tools, center it (somehow) and take a lot of .001/.002" passes on it with the spindle locked. Centering would be the hard part. Got ideas?
Ken,
Couldn't use scribe a centerline on the tool and set in your toolpost?
To get it nearly exact, place a tool you know is on center in your tool post, then use it to scribe a line the face of the gear using your cross slide (spindle stopped of course). Place your gear cutting tool in the tool post and match up the scribed lines.
Just be sure to NOT move the chuck during any of the process.
Now.....why can't you mill the teeth in your mill?
Program it, go have a beer or two or three, and by the time you come back it may be done!
Merry Christmas!
Russ
Ok, just realized you wanted to BROACH it!! Doh!
Thought you wanted to cut the teeth cause you texted me about it earlier today.
Does it have to 6mm? I think I have 5mm broaches. Will check at work tomorrow.
Later,
Russ
PS, if I do have a broach, it would take about 5 minutes start to finish in my press.
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12-22-2013, 10:34 PM
(This post was last modified: 12-22-2013, 10:36 PM by PixMan.)
Yes, it has to be a 6mm keyway. I don't have enough funds to be buying a broach and the shims, though I could easily make the 20mm bushing.
Same story with cutting the teeth. No funds to get a small flat back chuck to be able to put it on my horizontal/vertical rotary table and buy a 1.75 module x 20º gear cutter.
I got two guys on the PM site to quote me for hobbing the teeth. One said $100, the other $70 for the 70T gear, and I might also want to make blanks for the 30 and 35 tooth gears that the machine needs for other pitches. If I get just the 70T gear, I can do 0.25, 0.5, 1.0, 1.25, 1.5, 2.0, 2.5, 3.0 and 5.0. Adding the other two, I would be able to also do 0.75, 1.75, 3.5, 4.0 and a few others. Oddly, none of the gear combinations allows doing 0.7, though I don't know if I'd ever have to do an M4x0.7. A thread that small could be done with the dies I have.
Of course, as you mentioned in our text exchanges tonight, once I have the YAM CNC lathe up & running I won't need any gears at all! I think is just a good idea to have them for this lathe in the event I should ever sell it off. They would help with the value.
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