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Thread Calculator
Tools
Taper & Sine Bar Calculator
Calculate TPF/TPI, Taper Angle, and Sine Bar Stack Heights.
Inputs / Known Dimensions
Calculation Target
Find Taper Angle (from D, d, L)
Find Sine Bar Stack (from Angle)
Large Diameter (D)
Small Diameter (d)
Length of Taper (L)
Known Angle (Degrees)
Sine Bar Length (in)
5 Inch
10 Inch
Calculate
Reset
Formulas used:
Taper per Inch (TPI)
= (D - d) / L
Taper per Foot (TPF)
= TPI × 12
Included Angle
= 2 × atan((D - d) / (2 × L))
Formulas used:
Gage Block Stack Height
= Sine Bar Length × sin(Angle)
Results
Included Angle
0.00°
Angle to Centerline
0.00°
Taper per Inch (TPI)
0.0000"
Taper per Foot (TPF)
0.0000"
Gage Block Stack Height
0.0000"