| 摘要 |
A valve refacing tool having a housing with a bore therethrough which includes a large-diameter portion at one end thereof. A substantially cylindrical support is disposed within the large-diameter portion of the bore and is removably fixed to the housing, as by a plurality of screws extending radially therebetween. This cylindrical support has a small-diameter cylindrical opening which extends axially from the inner end thereof, and which communicates with the small-diameter end of a truncated conical recess which opens outwardly through the other axial end thereof. This conical recess accommodates the head of a poppet valve. A plurality of cutting blades are secured in angularly spaced relationship around the conical recess. The cylindrical support is split into a plurality of separable arcuate sectors, and each is individually fixedly but releasably secured to the housing. The cylindrical support defines a conical recess having a first angle suitable for refacing valve seats of that angle, but the cylindrical support can be replaced by a second cylindrical support having a different conical angle for refacing valve seats having this latter angle.
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