Original Spindle for JGRO

[rvoh1]

Hi Folks,

I need some direction for the spindle on my JGRO machine. I am 75% complete with the build, but am perplexed by what spindle I should use for the machine. I've searched the forum for answers, but have come up with nothing definite. The original design held something that was 2.680 diameter based on the plan details 41 and 42. Does anyone know what fit in there? If not, can I use a 2 1/4 HP Bosch router. It has about a 3 1/2" diameter that I know I will have to alter the mounting design. Will that be too heavy? I have seen some posts about using a Dremel or Roto-Zip, but I would rather stick with something that uses 1/2" bits. I am using 269 in/oz steppers and going with the original design of 1/4-20 leadscrew just to get my feet wet. I am planning to use my build to carve wood signs out of soft or hard wood. If all goes well, I will upgrade maybe to Joes CNC or something. Any suggestions or help would be appreciated, Thanks.

Ron

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[ger21]

Do yourself a favor and use at least 1/2-10 acme. It'll be at least twice as fast for only a few more dollars. 1/4-20 is really far to slow for any wood carving.

[Bri4n]

I believe it was either a Dremel or a Rotozip. I am planning on using a Black and Decker rotary saw to start with.

[Broken Balsa]

I am using a rotozip on mine. You can see the results on a sign I just did on my thread right below yours. Also I agree... use 1/2 10 Acme. You will a lot happier with it. Ron..Broken Balsa

[Glidergider]

Acme 1/2-8, 2 starts is twice as fast as the 1/2-10. About a year ago, I upgraded to the 1/2-8, 2 starts and my speed jumped by a factor of 2. Cost was not that much either. Well worth the added money.

[voltsandbolts]

When I first got my jgro running I used a Dremel tool with a 1/8 end mill in it. It worked ok at the speed you get with the 1/4-20 rod.