Xem Studiomeasured geometry

Library › Hardware › Mechanism parts ·

Internal (ring) gear, module 1, 60 teeth, Ø80

What size is a module 1, 60 tooth internal gear? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: internal gear, ring gear, annulus gear, module 1 ring gear 60 teeth, engranaje interior, Hohlrad

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

length
80.0 mm
width
80.0 mm
height
8.0 mm

Notes

  • Ring gear with 60 internal involute teeth, module 1, 20°: pitch Ø60, roots at Ø62.5 (rp + 1.25 m), tooth tips at Ø58.24 (addendum shortened to 0.88 m, the usual internal-gear correction that keeps the tips clear of the pinion's base-circle interference point); outside Ø80 × 8 with four Ø3.4 holes on a Ø71.25 circle.
  • A pinion of N teeth meshes inside at centre distance m(60 − N)/2: 20 T at 20 mm, 30 T at 15 mm, 18 T planets around a 24 T sun at 21 mm.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Internal (ring) gear, module 1, 60 teeth, Ø80 size chart

dimensionvalue
module1
teeth60 internal
pitch Ø60 mm
tip Ø (inside)58.24 mm
root Ø62.5 mm
outsideØ80 × 8 mm
holes4 × Ø3.4 on Ø71.25

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. 34: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

ring-gear-m1-60tinternal gear m1 60 T, Ø80 × 8, a space centred on +XSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=internal-ring-gear-m1-60t

Internal (ring) gear, module 1, 60 teeth, Ø80, isometric render of a generated part
Render of ring-gear-m1-60t from the free STEP; not to scale.

Fits with

Internal gear and pinion, 60 : 20 (3 : 1, same direction), isometric render of a generated part
Internal gear and pinion, 60 : 20 (3 : 1, same direction)4 sizes★ 1 file
Epicyclic (planetary) gear train: sun 24, planets 18, ring 60, isometric render of a generated part
Epicyclic (planetary) gear train: sun 24, planets 18, ring 605 sizes★ 1 file
Tusi couple: straight line from a gear rolling inside a ring twice its size, isometric render of a generated part
Tusi couple: straight line from a gear rolling inside a ring twice its size4 sizes★ 1 file
One pinion driving an internal and a spur gear on one axis (two speeds), isometric render of a generated part
One pinion driving an internal and a spur gear on one axis (two speeds)5 sizes★ 1 file

Questions

What size is a module 1, 60 tooth internal gear?

Ring gear with 60 internal involute teeth, module 1, 20°: pitch Ø60, roots at Ø62.5 (rp + 1.25 m), tooth tips at Ø58.24 (addendum shortened to 0.88 m, the usual internal-gear correction that keeps the tips clear of the pinion's base-circle interference point); outside Ø80 × 8 with four Ø3.4 holes on a Ø71.25 circle.

What is the centre distance of an internal gear and pinion?

m × (N_ring − N_pinion) / 2, e.g. 20 mm for 60 and 20 teeth at module 1.