As with the gear calculator, this gear drawing software also handles making drawing of various types of gears such as spur gears, worm gears, gear racks, bevel gears, internal gears, screw gears, etc. Bases for Calculation ZAR3+ calculates all dimensions of cylindrical worm gear pairs with ZI, ZA, ZK, ZN or ZH worms, as well as efficiency, tooth forces and the safety margins against root fatigue fracture and pitting.
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. Gear size calculator $. Gears & Sprockets Plastic Model Gears; Steel Model Gears; Industrial Grade Gears; Gear Racks; Sprockets & Chain. Worm and WormGear Design Equations and Calculator. Gears Engineering and Design. Equations for American Standard Fine Pitch Worms and Wormgears Per. ANSI B6.9 P = Circular pitch of wormgear P = axial pitch of the worm P x, = in the central plane P x = Axial pitch of worm P n = Normal circular pitch of worm and wormgear = Px cos λ = P cos ψ. What is a gear calculator? The gear calculator is a comprehensive software which, after inputting various parameters related to gear calculations, computes on-line automatically gear sizes, strengths, working forces, tooth forms, backlash conversions, etc.
Input Parameters
Teeth type - common or spiral
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
Worm Gear Pitch Diameter Chart
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
Free Worm Gear Calculator Download
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
Free Worm Gear Calculator
Lead
pz = z1 px |
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
![Guide Guide](https://www.researchgate.net/profile/Bernd_Sauer/publication/303673104/figure/fig2/AS:555437710086144@1509438077449/Flow-chart-of-the-calculation-of-the-gear-box-efficiency_Q320.jpg)
Worm gear outside circle diameter
da2 = d2 + 2m (ha* + x) |
Worm root cylinder diameter
Worm gear root circle diameter
![Free Free](/uploads/1/2/4/8/124896821/529190302.jpg)
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
bw = min (b1, b2) |
Contact ratio
εγ = εα + εβ
where:
Minimum worm gear tooth correction
where:
ha*0 = ha* + c* - rf* (1 - sin α) | |
c = 0.3 | for α = 20 degrees |
c = 0.2 | for α = 15 degrees |