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Eccentric bush Ø16 × 12 with Ø6 bore offset 2.5 mm and a 50 mm lever

How does an eccentric bush throw gears in and out of mesh? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: eccentric bush, eccentric sleeve, back gear eccentric, casquillo excéntrico, Exzenterbuchse

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

length
58.0 mm
width
16.0 mm
height
12.0 mm

Notes

  • Ø16 × 12 bush whose Ø6 bore is 2.5 mm off centre, with a 10 × 4 lever: turning it half a turn in its housing moves the axle 5 mm, more than the 2.25 mm tooth depth of module 1 gears, so the pinion swings fully in or out of mesh.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Eccentric bush Ø16 × 12 with Ø6 bore offset 2.5 mm and a 50 mm lever size chart

dimensionvalue
bushØ16 × 12
boreØ6, 2.5 mm off centre
lever50 × 10 × 4

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. 56: 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

eccentric-bush-16-bore6-e2-5-leverbush, axis Z, centre at origin, bore at (-2.5, 0), z -14..-2STEP · 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.
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Plain text: sheet.txt · JSON: /api/geometry?object=eccentric-bush-16-bore6-e2-5-lever

Eccentric bush Ø16 × 12 with Ø6 bore offset 2.5 mm and a 50 mm lever, isometric render of a generated part
Render of eccentric-bush-16-bore6-e2-5-lever from the free STEP; not to scale.

Fits with

Gear thrown in and out of mesh by an eccentric bush (lathe back gear), isometric render of a generated part
Gear thrown in and out of mesh by an eccentric bush (lathe back gear)4 sizes★ 1 file

Questions

How does an eccentric bush throw gears in and out of mesh?

Ø16 × 12 bush whose Ø6 bore is 2.5 mm off centre, with a 10 × 4 lever: turning it half a turn in its housing moves the axle 5 mm, more than the 2.25 mm tooth depth of module 1 gears, so the pinion swings fully in or out of mesh.