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R300 Series Racks – Threaded

To determine your part number.  See the example in the graphic.  Start by selecting desired diameter for your rack, example R301 series represents 1.000 diameter rack.  Next is the uncut length “C”, in this example it is 2.50, then the overall length “L” of 12.50.  Next is your desired pressure angle, select 14 1/2 or 20,  in this example 20 pressure angle was chosen.

Next select your pitch, which in this example is “8” pitch.  Thread “B” is 3/4 -16, with “D” dimension of .500.

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Make sure to have the following information handy when making your request for quote:

  • Desired rack diameter
  • Uncut length, “C” length
  • Overall “L” length including “C” and “D” length dimensions
  • Desired pressure angle (14 1/2 or 20)
  • Thread diameter “B”
  • Thread length “D”