Sine Bar Calculator

Inputs

Solve for

Sine bar length (L)

Angle (θ)

Default result

Gauge stack height(h)

50mm

Stack of gauge blocks under the raised roll, h = L·sin θ.

Also computed

Angle(θ)30°

Angle of the sine bar from the surface plate, θ = asin(h/L).

Method notes 3 notes

Gauge stack h = L · sin θ — the roll-centre length times the sine of the set angle.
L is the roll-centre distance (centre-to-centre of the two rolls), not the overall bar length.
Use slip (gauge) blocks wrung into one stack and check on a flat surface plate; the bar must be clean and burr-free.