Automatic Screw Machines


 Multiple Spindle – Diameters from 1/32” to 3 ½” / Lengths to 23”

  • National Acme 8-spindle automatic screw machines (conventional and direct drive). Diameters to 2 5/8”.
  • New Britain 8-spindle automatic screw machine.
  • New Britain 6-spindle automatic screw machines
  • Pick off and back finish. Thread rolling. Watkins saws. CNC slides


  • Screw Machining – Within + .0005” on diameters, + .001” on lengths. Concentricities to + .001” T.I.R. Lengths to 23”.
  • CNC Machining – Within + .0001” on diameters, + .0005 on lengths. Concentricities to + .0005” T.I.R.

Secondary Operating Equipment

  • Wirth & Gruffat 8-station rotary transfer machines
  •  Complete Secondary Department for drilling, tapping, milling, turning, threading, knurling, and grinding 
  • Vibratory deburring


 PPTP machines component parts from ferrous and non-ferrous metals and machinable plastics. Materials machined are in round, Hex, square and specialty drawn/extruded shapes, including tubing. PPTP maintains relationships with approved material suppliers, and sources material mill direct, and from full line service centers. Prime materials are: 

  • Free machining alloy steels, including stainless steel
  • Brass and other copper alloys, including bronze
  • Aluminum alloys – primarily 2000, 6000 and 7,000 Series

Outside Services

PPTP has approved outside vendors to perform an array of outside services, including:


  • Plating – zinc, nickel, tin, black oxide, chromate conversion, anodizing, passivation
  • Heat Treating – Case, induction and through hardening, austentic tempering, annealing, Carbonitriding, Carburizing, quenching
  •  Grinding – Centerless, through feed and in feed, cylindrical and bar
  •  Powder Painting
  • Laser Marking
  • Silk Screening
  •  Shot Blasting
  •  Buffing and Polishing
  • Deburring
  •  Military Packaging