⚙ Gear & Drive Calculator

JIS/ISO Standard · 11 Calculation Types · JGMA Strength · Engineering Drawing

Spur / Helical Internal Gear Rack Bevel Gear Screw Gear Worm Gear Planetary Cycloidal Harmonic Tooth Thickness Strength

SpurHelical

MetricImperial

Module m

No. of Teeth z₁

No. of Teeth z₂

Pressure Angle α

deg

Profile Shift x₁

Profile Shift x₂

Backlash j_n

Module m

Pressure Angle α

deg

External Gear z₁

Internal Gear z₂

Profile Shift x₁ (ext)

Profile Shift x₂ (int)

Spur RackHelical Rack

Module m

Pressure Angle α

deg

Pinion Teeth z

Profile Shift x

StraightSpiral

Pinion Teeth z₁

Gear Teeth z₂

Module m

Pressure Angle α

deg

Shaft Angle Σ

deg

Face Width b

mm (0=auto)

Normal Module m_n

Pressure Angle α

deg

Teeth z₁

Teeth z₂

Helix Angle β₁

deg

Helix Angle β₂

deg

Shaft Angle Σ

deg

Hand (Gear 1)

Friction Coeff. μ

Worm Starts z₁

Gear Teeth z₂

Axial Module m_x

Diameter Quotient q

d₁=q·m

Pressure Angle α

deg

Friction μ

Input Speed

RPM

Input Torque

Sun Teeth Z_s

Planet Teeth Z_p

Ring Teeth (auto)

= Zs+2Zp

No. of Planets

Module m

Pressure Angle α

deg

Stages

Fixed Member

Efficiency

%/stage

Input Speed

RPM

Input Torque

Disc Lobes

Ring Pins (auto)

= Lobes+1

Pin Circle Radius

Pin Radius

Eccentricity e

Stages

Input Speed

RPM

Input Torque

Flexspline Teeth Z_f

Circular Spline Z_c

= Zf+2

Module m

Wall Thickness

Input Speed

RPM

Input Torque

Module m

Pressure Angle α

deg

No. of Teeth z

Profile Shift x

Roller/Ball ⌀

mm (0=auto)

Gear Geometry

Normal Module m_n

Pressure Angle α

deg

Helix Angle β

deg (0=spur)

Pinion Teeth z₁

Gear Teeth z₂

Profile Shift x₁

Profile Shift x₂

Face Width b

Material & Heat Treatment

Pinion Material

Gear Material

σ_Flim Pinion

MPa (0=auto)

σ_Flim Gear

MPa (0=auto)

σ_Hlim Pinion

MPa (0=auto)

σ_Hlim Gear

MPa (0=auto)

Load Condition

Torque Power

Pinion Speed n₁

RPM

Input Torque T₁

N·m

Load Cycles

Service Factors

Precision Grade

Driving Machine

Driven Machine

K_Hβ Load Distrib.

Safety Factor S_F

bending

Safety Factor S_H

pitting

Z_L Lubricant

Z_R Roughness

Z_V Sliding Speed

Spur / Helical Gear & Gear Reducer Design Calculator Tool

⚙ Gear & Drive Calculator