Kerf Spacing Calculator Bending Wood

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Kerf Spacing Calculator for Bending Wood Kerf Bend Ellipse

See also: Kerf Spacing Ellipse

Curve Radius outside
Curve Sweep Angle
? Thinner kerf cuts will be spaced closer together giving a smoother curve. Wider cuts may give a curve with segments having sharper bends at the kerf cut. Kerf Width
Wood Thickness
? Thickness of remaining wood after kerf is cut. The optimum Minimum Thickness of wood to obtain the curve cannot be calculated. It depends on the type of wood, grain, dimensions etc. Test with scrap first to perfect. Min Thickness
Fraction Decimal

? Board starts off straight, curves, then continues straight again. Kerfs start and end at each end of curve. See diagrams ? Curve is entire length of board. Kerfs start 1 space in from ends. See diagrams Curve in Longer Board Curve End to End

? Cut kerfs with a router and tapered bit to remove gaps. Rout test piece with tapered bit at required depth to measure Kerf Width entry. See Tapered Bit Kerf Width Calculator below. Router Tapered
? Draw Curved Diagram with straight Facets between kerfs, instead of an even curve. Thinner kerfs will shorten distance between cuts, and lessen faceting effect. See Diagram. Draw Faceted
Color Dimensions

Scale

Running Centers:
Mark-out

This calculator finds the spacing of the cuts (at entered dimensions), so when the piece is bent, the inside edges of each cut touch together to form the correct curve. Minimum wood thickness for bend

The optimum depth of the cut, and thus remaining minimum thickness of wood to obtain the curve cannot be calculated. It depends on the type of wood, grain, dimensions etc. Test your dimensions and cut depth on pieces of scrap first, to perfect.

Geometrically, more, closer and thinner kerf cuts should give a smoother curve -- Less and wider cuts may give a curve with segments having sharper bends at the kerf cut. Please let us know your experience re: optimal actual curves, using different wood, min thickness, kerf thickness etc, so we can try to improve this calculator.

Tapered Router Bit - Kerf Width Calculator

Calculate Kerf Width here, then check Router Tapered and enter Kerf Width in top calculator.

Input Decimal Inches
? Taper angle per side. Total taper angle = 2 times this angle. Taper Angle °
Shank Diameter
Use smallest tip possible to reduce gap at bottom of cut ! Tip Width
Flat Tip Ball Tip

Wood Thickness
Min Thickness
Color Dimensions

Scale Full Scale

Calculate Curve Radius and Sweep Angle
From Width and Height

Curve Width
Curve Height
Lock Angle

Sweep

Precision

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All Inch inputs and dimensions are actual physical finished sizes (unless otherwise noted)

Fraction Precision

Lumber Sizes

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