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Rectangular (oblong) gear, module 1.5, 40 teeth, driver

What shape is the driver of a rectangular gear pair? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: rectangular gear, oblong gear, non circular gear, engranaje rectangular, Rechteckzahnrad

Exact dimensions. True size, with no printing tolerance added.

length
65.62 mm
width
49.39 mm
height
12.0 mm

Notes

  • Pitch curve a rounded rectangle (superellipse |x/1.35|^3.5 + |y|^3.5 = 1, scaled to a perimeter of 40 × π × 1.5 mm) pivoted at its centre.
  • Teeth generated by a 20° basic rack rolled round the pitch curve (spline outline within 0.008 mm of the generated curve); Ø8 bore at the pivot, 12 mm face.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Rectangular (oblong) gear, module 1.5, 40 teeth, driver size chart

dimensionvalue
module1.5
teeth40
size65.62 × 49.38 mm over tips
boreØ8
face12 mm

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Henry T. Brown (1868, public domain)Five Hundred and Seven Mechanical Movements — scan on archive.orgwebPublisher's page; dimensions are facts
507movements.comBrown's movement No. 30: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

rectangular-gear-m1-5-40t-drivergear, pivot on the Z axis, z 0..12STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=rectangular-gear-m1-5-40t-driver

Rectangular (oblong) gear, module 1.5, 40 teeth, driver, isometric render of a generated part
Render of rectangular-gear-m1-5-40t-driver from the free STEP; not to scale.

Fits with

Rectangular (oblong) gears for a varying speed, isometric render of a generated part
Rectangular (oblong) gears for a varying speed4 sizes★ 1 file

Questions

What shape is the driver of a rectangular gear pair?

Pitch curve a rounded rectangle (superellipse |x/1.35|^3.5 + |y|^3.5 = 1, scaled to a perimeter of 40 × π × 1.5 mm) pivoted at its centre.