The blade parameters we need are the following:
- Length (L)
- Height (m)
- Thickness (V)
- The width (V1) and thickness (V3) of the shoulder if applicable
- Distance between holes and distance of the holes from one end of the blade (a, b, c)
- Shape, position and size of the holes (a, b)
Measuring the distance between two holes isn’t trivial, since technical drawings often feature the distance between the centers of the holes. Nevertheless, the same result can be obtained by measuring the distance between the edges of the holes on the same side. This avoids estimating the center of the holes at a glance. This method works for all hole shapes: round, oval, rectangle.
In order to measure the distance between the hole centers and the edge of the blade (variable “a”), it is sufficient to add half of the hole diameter to the distance between the edge of the hole and the edge of the blade. This diameter can be measured easily: set the caliper to the maximum size that fits into the hole.