HELIX CORRECTION CALCULATOR

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Top Cut Off
Bottom Cut Off
Left Flank Slope (fHα)	Right Flank Slope (fHα)
Taper Adjustment INCHES!
Helix Adjustment DEGREES!
Reset	Calculate
Evaluation Length (Lβ)
Helix Deviation INCHES

*A negative value in the taper adjustment column means that the part needs to be smaller on the bottom, assuming that the part is being checked on the P-100 in the same orientation that it is being hobbed. A positive value would mean it needs to be larger on the bottom.

GEAR DATA

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Number of Teeth (z)
Helix Angle in Degrees (β)
Normal Diametrial Pitch (Pnd)
Peices Per Cycle
Face Width of Gear

HOB CUTTER DATA

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Number of Gashes (Flutes)
Usable Cutting Length
Shift Increment

CALCULATED RESULTS

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Number of Pieces Per Cutter
Linear Meters per Hob Tooth*

CALCULATE TARGET SHIFT INCREMENT

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Target Linear Meters*
Target Shift Increment
* General Goal for Hobbing should be 4-5 meters per tooth
Goal for 3DP and larger is 1-2 Meters per tooth.

Reset

Calculate

CALCULATED RESULTS

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Circular Pitch
Linear Inches of Gear Teeth
Usable Number of Hob Teeth
Linear Inches of Gear Teeth/Cutter
Linear Inches per Hob Tooth

ROOT DATA

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Normal Diametrial Pitch (Pnd)
Root Radius (inches)
Root Fillet Factor

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Root Radius (mm)
Normal Module
Reset	Calculate

SURFACE FINISH DATA

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Micrometer-Ra(From P100)
MircoInch-Ra
Reset	Calculate

TOOTH THICKNESS to DOP

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Number Of Teeth (z)
Normal Diametrial Pitch (Pnd)
Normal Helix Angle (ψs)
Normal Pressure Angle (an)
Ball or Pin Diameter

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Normal Circular Tooth Thickness
Dimension Over Pins
Reset NCTT Entry Reset ALL	CalculateDOP

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Dimension over Pins to Normal Circular Tooth Thickness

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Number Of Teeth (z)
Normal Diametrial Pitch (Pnd)
Normal Helix Angle (ψs)
Normal Pressure Angle (an)
Ball or Pin Diameter

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Dimension Over Pins
Normal Circular Tooth Thickness:
Reset DOP Entry Reset ALL	Calculate NCTT

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