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How to use an acrylic radius gauge?

Shop for Radius Gauges

Acrylic gauge checking for imperfections

Step 1 – Select gauge

Select an acrylic radius gauge. It can be used in the same way as individual radius blade using the visual test method. The acrylic gauge is used commonly for woodworking applications because the acrylic will not leave dark markings on the wood.

Acrylic radius gauge measuring spindle

Step 2 – Choose function and position gauge

Choose which function is most appropriate, either checking moulding or layout creation. Pictured is a wooden moulded spindle.

To check moulding, position the acrylic gauge against the curved surface and check for any gap between the two.

For layout information see 'How do i use a radius gauge as a template for scribing)

Checking spindle radius at multiple locations

Step 3 – Position gauge

Place the acrylic gauge so that the concave radius fits against the convex surface of the spindle at various locations. It is important each spindle conforms to the radius measurement at equal positions so that they look and perform correctly when the work piece is finished.

Range of acrylic radius gauges A number of gauges may be required, especially when working with complex spindle layouts. Each gauge typically refers to two consecutive size concave and convex measurements.
Stair spindles This process is often part of quality control to ensure that each spindle is made to the same quality with a consistent radius, which is important both visually and structurally.