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Neway PF140 11/32
Neway PF140 11/32

Neway PF140 11/32" STD | Standard Series Valve Guide Pilot | Top Diameter .375

$ 15.61

Availability: 100 in stock
  • Restocking Fee: No
  • Type: Neway Valve Seat Cutter Pilot
  • Item must be returned within: 30 Days
  • Country/Region of Manufacture: United States
  • Return shipping will be paid by: Seller
  • Condition: New
  • Refund will be given as: Money Back
  • Brand: Neway Mfg
  • Manufacturer Part Number: PF1401132
  • Returns Accepted: Returns Accepted
  • Number of Pieces: 1

    Description

    Neway PM140-11/32"  | Standard Series Solid Valve Guide Pilot | Top Diameter .375
    Center Portion of Taper (Middle) -  0.3435" (8.72mm)
    Widest Portion of Taper (Top) -----  0.3448" (8.76mm)
    Bottom Portion of Taper Length - 3.500" Long
    Top Portion of Pilot Shaft (Cutter Portion):  .375 Diameter - 3.00" Long
    Center-less ground for extremely tight tolerances.
    Made in USA
    The following information is from Neway Manufacturing Technical Recommendations:
    The pilot is absolutely critical to getting a concentric valve seat. It “pilots” the cutter by indicating off the same bearing surfaces that the valve stem will be riding on, and carrying that center-line up to the cutter. If the pilot is not straight and concentric, the cutter cannot form a concentric seat. Neway pilots are center-less ground, a process that enables us to hold extremely tight tolerances.
    Solid pilots have a very slight taper ground into them, so that they lock into the valve guide. The rate of taper is just .0007” per inch (7 microns/cm). This very slight taper means that the pilot will be hanging onto enough of the length of the guide bore to accurately capture the center-line. The flip side of having such a slight amount of taper is that a single pilot can only accommodate a small amount of variance between guide bore sizes, so you will usually require more than one solid pilot for any given nominal size.
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