wquiles
Flashaholic
Can I please get some pointers on how to Tri-bore a mag for a 3x17670 battery pack? How do you guys do it? Photos, links, etc. - anything would be appreciated 
Will
Will
how to try-bore a "D" Mag?
- Thread starter wquiles
- Start date
Help Support Candle Power Flashlight Forum
gadget_lover
Flashaholic
That's about 8 inches, and each bore about 2/3 inch.
It depends on the tools you have available.
If you have a mill with a real long travel (16 inches plus chuck) you can mount the light on the table vertically and use a 10 inch long boring bar.
If you have a mill where the head swings to the side, you can clamp the light to the side of the table and swing the head over it. Then you only need about 8 inches of travel.
If you have only a lathe you can build a carrier to clamp the light to the carriage (parallel to the ways) and put the boring bar in the chuck.
I think I will try both the second and third way. When I get around to it I'll post pictures.
My large drill press will allow me to turn the table 90 degrees, but it only has 4 inches of travel in the quill.
Or you could buy/make a horizontal boring machine.
Daniel
It depends on the tools you have available.
If you have a mill with a real long travel (16 inches plus chuck) you can mount the light on the table vertically and use a 10 inch long boring bar.
If you have a mill where the head swings to the side, you can clamp the light to the side of the table and swing the head over it. Then you only need about 8 inches of travel.
If you have only a lathe you can build a carrier to clamp the light to the carriage (parallel to the ways) and put the boring bar in the chuck.
I think I will try both the second and third way. When I get around to it I'll post pictures.
My large drill press will allow me to turn the table 90 degrees, but it only has 4 inches of travel in the quill.
Or you could buy/make a horizontal boring machine.
Daniel
Last edited:
wquiles
Flashaholic
Thanks Daniel. I should point out that on this first project, I am only doing a 1.25D Mag body, so dealing with only 4" or so
Will
Will
Anglepoise
Flashlight Enthusiast
To me this looks like a very slick way of doing it. I am sure most of us have quick release tool posts with vertical movement and it would be easy to make up holders that received the maglight bodies and fitted the tool post.
gadget_lover
Flashaholic
OK, here's how brain fade works.
You are boring for 3 17670s, right?
Each is 67 mm long.
So three times 67 is 201 MM.
Thus the 8 inches.
Note, I've totally ignored the fact that you are doing a tri-bore and the cells will be side by side. SIgh. Brain fade!
Daniel
You are boring for 3 17670s, right?
Each is 67 mm long.
So three times 67 is 201 MM.
Thus the 8 inches.
Note, I've totally ignored the fact that you are doing a tri-bore and the cells will be side by side. SIgh. Brain fade!
Daniel
Torque1st
Enlightened
Try a search here or the link below. This was a neat home built boring machine:
http://candlepowerforums.com/vb/showthread.php?t=169824
http://candlepowerforums.com/vb/showthread.php?t=169824
wquiles
Flashaholic
Thank you guys - good ideas!
I have an older Enco floor drill (not a mill, but being a floor model has TONS of room and about 5" of travel), but looking at these suggestions, that might work since I am not doing any side-to-side movement, but mostly straight up and down movement. I might give this a try with some scrap pieces to see how well that might work out
Will
I have an older Enco floor drill (not a mill, but being a floor model has TONS of room and about 5" of travel), but looking at these suggestions, that might work since I am not doing any side-to-side movement, but mostly straight up and down movement. I might give this a try with some scrap pieces to see how well that might work out
Will
Northern Lights
Flashlight Enthusiast
It has some good ideas, works for me.
MAG BORING-I BUILT MY OWN MILL-PICT!
MAG BORING-I BUILT MY OWN MILL-PICT!
Thank you guys - good ideas!
I have an older Enco floor drill (not a mill, but being a floor model has TONS of room and about 5" of travel), but looking at these suggestions, that might work since I am not doing any side-to-side movement, but mostly straight up and down movement. I might give this a try with some scrap pieces to see how well that might work out
Will
Make sure you have the tube perfectly straight in the holder. Also - I would suggest some kind of 'V' shaped blocks to hold it straight, not just the sides of a regular vise. When you tri bore - the cutter will hit the edge being cut.
wquiles
Flashaholic
I think I "see" that you mean. I am thinking in creating some sort of "fixture" to hold the body. Thanks for the ideas ...
Will
gadget_lover
Flashaholic
I almost posted a comment to the effect that when it comes to metalworking, the fixtutres that hold things are a critical component. For some reason I did not, which is strange considering I just ordered $200 worth of collets, spin indexers and so forth.
One of the nice things about tri-bores, is that you are not required to be super accurate. You should be able to align it by eye. You are also taking out a fairly small amount of metal.
A vise will not work really well, since it only holds on two sides and will let the body swing. But if you create a cradle to hold it, it should be sturdy enough. Even a cradle made of wood will do. A hole saw will cut just about the right sized hole,
Daniel
One of the nice things about tri-bores, is that you are not required to be super accurate. You should be able to align it by eye. You are also taking out a fairly small amount of metal.
A vise will not work really well, since it only holds on two sides and will let the body swing. But if you create a cradle to hold it, it should be sturdy enough. Even a cradle made of wood will do. A hole saw will cut just about the right sized hole,
Daniel
