- Worm Gear Design Guide
- Worm Gear Design
- Worm Gear Design Calculation
- How To Design Worm Gears
- Worm Gear Calculation Software
Gears and Gear Ratios. Is like a normal gear wheel or spur gear. The worm always drives the worm wheel round. To design a gear system. 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 r f * Face widths b 1, b 2 Unit worm gear correction x Worm size can be specified using the: worm. KISSsoft 03/2013 – Tutorial 16 Analyzing the Geometry of Cylindrical Worm Gears double enveloping Worm Wheel KISSsoft AG. Call to the worm gear calculation. Modifying the design to give predominantly “recess action” i.e. Approach would be made small or zero and the angle of recess larg. 15.4 Worm gear force analysis a) The tangential, axial, and radial force components acting on a worm and gear are illustrated in the Fig. B) For the usual 90 shaft angle, the worm tangential force is equal to the gear.
Input Parameters
- WORM GEARS TO GET HAVING RULE. Pitch & worm gear helix angle Divide the axial diametral pitch by the cosine of. 491-1073 and ask for Design Support.
- The application factor is 1.25 and the design factor is 1; gear face width is 2 in. The normal diametral pitch for a worm gear is the same as for a helical gear.
- Worm Gear Manual Gears and linear products since 1964 /// Page 2 Design of the worm gear /// Page 3 Mounting instructions /// Page 4 Operating instructions and choice of oil /// Page 5 Unique gear number /// Page 6 Spare parts diagram /// Page 7 Spare parts list /// Page 8 Declaration of incorporation.
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
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 |
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
Worm Gear Design Guide
da2 = d2 + 2m (ha* + x) |
Worm root cylinder diameter
Worm Gear Design
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
bw = min (b1, b2) |
Worm Gear Design Calculation
Contact ratio
εγ = εα + εβ
where:
Minimum worm gear tooth correction
where:
How To Design Worm Gears
Worm Gear Calculation Software
ha*0 = ha* + c* - rf* (1 - sin α) | |
c = 0.3 | for α = 20 degrees |
c = 0.2 | for α = 15 degrees |