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7/8 x 9 tpi threaded spindle

Discussion in 'Newbie' started by Perry Hilbert, Oct 19, 2017.

  1. Perry Hilbert

    Perry Hilbert

    Sep 27, 2017
    Windsor, Pennsylvania
    Ok it is not a lathe, but I think it could be used to turn trays and shallow bowls. . I was given a contraption that loosely resembles a pedestal grinder. the base is 30 inches in diameter and about 8 inches high. It could be filled with sand or stone.. A large electric motor sits on top the base. Power to the horizontal arbor above is by two v-belts connecting the double pulley on the motor to the double pulley in the middle of the arbor.. on the right side is a two inch wide, 12 inch diameter grind stone about 120 grit. The left side of the arbor just has a threaded stub. The arbor is supported by two hefty iron supports with old fashioned cup oilers. Without the base filled by anything, the unit weighs about 250 pounds. Everything is made of heavy steel plate (1/4 inch minimum) The spindle is about 42 inches from the floor. I have tried calculating the rpms, and I am coming up with about 170 to 190.

    Is there a spindle adapter for a 7/8 x 9 NC thread?. (I checked it with a thread gauge) or will I have to 1) make a face plate or 2) have one custom made.

    I have a piece of 12 inch round aluminum 1/2 inch plate. I could fit a threaded hub to that to make a face plate.

    Mostly just thinking out loud about a way to turn a large flat piece of walnut, and a 16 inch diameter bowl blank.. I could mount a router sideways to cut the bowl and turn the thing slowly by hand as well.
  2. Bill Boehme

    Bill Boehme Administrator Staff Member

    Jan 27, 2005
    Dalworthington Gardens, TX
    Home Page:
  3. tdrice


    Apr 25, 2006
    Coos Bay, OR
    "Fastenal" carries 7/8 x 9 NC Nuts in both right and left hand. Weld one (or have it welded) to a round piece of steel and you have a faceplate.

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