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Slotted arm with a 60° toothed sector (module 1, 60 T), Ø5 bore

What is a slotted sector arm? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: sector gear arm, slotted sector lever, toothed sector, brazo ranurado con sector dentado, Schlitzhebel mit Zahnsegment

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

length
28.85 mm
width
138.98 mm
height
8.0 mm

Notes

  • 8 mm plate: a 60° sector of a module 1, 60-tooth gear (pitch R30) on one side of a Ø14 hub (Ø5 bore) and a 16 mm wide arm 100 mm long on the other with a 6.4 mm slot from 40 to 100 mm out for a crank-pin slide block. Teeth are placed so a tooth space is centred on the arm's axis (−Y).
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Slotted arm with a 60° toothed sector (module 1, 60 T), Ø5 bore size chart

dimensionvalue
sector60° of 60 T, module 1 (pitch R30)
arm100 mm, 6.4 slot 40–100
hubØ14, Ø5 bore
thickness8 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. 131: 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

slotted-arm-sector-gear-m1-60tarm on +Y, teeth centred on −Y, z 0..8STEP · 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=slotted-arm-sector-gear-m1-60t-60deg-b5

Slotted arm with a 60° toothed sector (module 1, 60 T), Ø5 bore, isometric render of a generated part
Render of slotted-arm-sector-gear-m1-60t from the free STEP; not to scale.

Fits with

Crank, slotted arm and toothed sector driving a rack, isometric render of a generated part
Crank, slotted arm and toothed sector driving a rack5 sizes★ 1 file

Questions

What is a slotted sector arm?

8 mm plate: a 60° sector of a module 1, 60-tooth gear (pitch R30) on one side of a Ø14 hub (Ø5 bore) and a 16 mm wide arm 100 mm long on the other with a 6.4 mm slot from 40 to 100 mm out for a crank-pin slide block. Teeth are placed so a tooth space is centred on the arm's axis (−Y).