Free Worm Gear Calculator
The following online calculator computes the parametric equations of a globoid (throated) worm shaft based on its basic dimensions, shape and desired number of teeth in the matching gear wheel. Gear Generator is a tool for creating involute spur gears and download them in DXF or SVG format. In addition it let you compose full gear layouts with connetcted gears to design multiple gears system with control of the input/output ratio and rotation speed.
- Free Spur Gear Calculator
- Worm Gear Pitch Diameter Chart
- Worm Gear Calculation Formula
- Free Worm Gear Calculator
Input Parameters
Teeth type - common or spiral
Gear size calculator $. Gears & Sprockets Plastic Model Gears; Steel Model Gears; Industrial Grade Gears; Gear Racks; Sprockets & Chain. Online gear calculation of spur and helical gears with involute gear Sizes of individual wheel and gears pairing - easy, fast and completely free! Useful knowledge to the understanding: concepts and determinants for cylindrical gears Data entry. Using the right push-button, calculate the maximum power the particular worm gearing is able to transmit. 1.4 Speed (Worm / Worm gear). Enter the worm speed. The common worm speed is up to 3000 rpm, while extreme speed may be up to 40000 rpm. Worm gear speed is calculated from the number of teeth of both gears.
Gear ratio and tooth numbers
Pressure angle (the angle of tool profile) α
Module m (With ANSI - English units, enter tooth pitch p = π m)
Unit addendum ha*
Unit clearance c*
Unit dedendum fillet rf*
Face widths b1, b2
Unit worm gear correction x
Worm size can be specified using the:
- worm diameter factor q
- helix direction γ
- pitch diameter d1
Auxiliary Geometric Calculations |
Calculated parameters
Common gearing ZN
Axial module | mn = m |
Normal module | mx = mn cos γ |
Axial pressure angle | αx = a |
Normal pressure angle | αn = arctg (tg α cos γ) |
Helix/lead angle | γ = arcsin z1/q |
Spiral gearing ZA
Axial module | mn = mx / cos γ |
Normal module | mx = m |
Axial pressure angle | αn = arctg (tg α cos γ) |
Normal pressure angle | αx = α |
Helix/lead angle | γ = arctan z1/q |
Normal tooth pitch
Axial tooth pitch
px = πx |
Basic tooth pitch
Lead
pz = z1 px |
Free Spur Gear Calculator
Virtual/alternate number of teeth
Helix angle at basic cylinder
sin γb = sin γ cos αn |
Worm pitch cylinder diameter
Worm gear pitch circle diameter
d2 = z2 mx |
Worm outside cylinder diameter
Worm gear outside circle diameter
da2 = d2 + 2m (ha* + x) |
Worm root cylinder diameter
Worm gear root circle diameter
df2 = d2 - 2m (ha* + c* - x) |
Worm rolling(work) circle diameter
Worm gear rolling(work) circle diameter
dw2 = d2 |
Worm gear root circle diameter
Center distance
Chamfer angle of worm gear rim
Worm tooth thickness in normal plane
Worm gear tooth thickness in normal plane
Worm tooth thickness in axis plane
sx1 = s1 / cos γ |
Worm gear tooth thickness in axis plane
Work face width
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bw = min (b1, b2) |
Contact ratio
εγ = εα + εβ
Aeria points hack. where:
Worm Gear Pitch Diameter Chart
Minimum worm gear tooth correction
Worm Gear Calculation Formula
where:
Free Worm Gear Calculator
ha*0 = ha* + c* - rf* (1 - sin α) | |
c = 0.3 | for α = 20 degrees |
c = 0.2 | for α = 15 degrees |