The Vemco 9P-11 is a specific 12-inch clear acrylic architect’s scale designed to attach directly to the protractor head of a Vemco drafting machine.
Breaking down the standard Vemco model code system:
Model Number Breakdown
9 (Length & Style): Designates a standard 12-inch scale arm with standard Vemco chuck/mounting tabs.
P (Material): Stands for Plastic/Clear Acrylic (as opposed to A for aluminum or B for boxwood with white plastic faces). Clear plastic allows the draftsperson to see drawing lines underneath the ruler edge.
11 (Graduation / Reduction Ratios): Specifies the standard Architectural scale face ratios
Key FeaturesMounting:
Features Vemco's universal notch and lock-screw fitting, compatible with Vemco V-Track, elbow, and arm drafting machines (as well as compatible heads like Bruning or Mutoh).
Underside Engraving: Graduations are engine-divided on the underside of the clear plastic edge to minimize parallax error when marking lines.
NOS - New Old Stock