PEG

PEG

GRINDING ENGINES

Peg 25-50 - Boring online for trees to CAM

The PEG 25-50 boring tool is specially designed for use on aluminium cylinder heads with "cast-in" camshaft bearings. The tool will rebore camshaft bearing surfaces to any size with precision alignment, on warped cylinder heads or when the bearing surface must be filled or welded. The flexibility of the tool's design is such that it can be used on a wide range of cylinder head types. A simple fitting operation makes rapid rnovernent possible between heads of the same type.

COMPONENTS

  • Feed assembly with locking nut, support, attachment plates with locating bush and attachment ears
  • Cutting with six (6) cutting bits
  • End attachment piate with locating bush and attachment ears
  • Centre supporf unit with bush

  • Locating bush set
  • accessory kit, comprising: setup micrometer, hex bali driver, hex wrenches, spare cutting bit
  • carrying case

PRINCIPLES OF OPERATION

  • Centering of the cutting bar for line boring is carried out by the use of locating bushes designed to fit in the cam oil seal and/or aia plug at either end of the cylinder head
  • The cutting bar and locating bushes are held in position by the attachment ears. When these are secured to the upper valve cover gasket surface of the cylinder head, the cutting bar will be properly aligned
  • The attachment ears are adjustable and will fit ower valve cover studs (if avaiiable) or can be fixed by nuts, bolts and/or clamps or washer combinations. Ensure that the cutting bar can travel freely - a hogged or warped cylinder head causes friction on the bar. If necessary, adjust with spacers before completing attachment
  • A centre support unit is provided with the tool. Because of the flex of the cutting bar, the unit must be used when the supports are widely spaced
  • The cutting bits are spring loaded, with locking nuts to secure fhem in the correct position (fig 3)
  • The boring tool is driven by coupling to a portable drill provided with a hex bali drive bit (fig 4). Rotation must be clockwise, otherwise the bar will not be pulled towards the other end
  • Before motorizing the bar, tighten the feed bush well (fig 5) to avoid the bar running free
  • The micrometer gives a direct reading of the cutting radius
  • Removing material from bearing caps follows the same principle as re-sizing connecting rods. A smaller hole will be obtained only on top and this can be bored back to its original size and alignment


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MAIN CHARACTERISTICS

Cutting tips6 Pz.
Locations available for tips12
Race boring max90 mm
Diameter boring min24 mm
Diameter boring max40 mm
Elettric powertipo a vite madre
Feed per revolution 0,05 mm
Speed Linear Power400 - 600 giri/min
Shipping Weight10 Kg

Warnings

Do not use the boring tool for larger or smaller diameters than it is designed for (from 24 to 40 mm). Neither must it be used for purposes other than line boring cylinder heads, as this will cause irreparable damage to the tool