Xem Studiomeasured geometry

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Edge-runner (chaser) mill: two rollers on one axle rolling round a pan

How does an edge-runner mill crush? · Hardware · basis: Xem Studio design following Brown No. 375 (1868)

Also called: edge runner mill, chaser mill, pan mill, kollergang, molino de muelas verticales, Kollergang

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

sizes
4 in table

Notes

  • Two heavy wheels on a horizontal axle that passes through a vertical spindle: turning the spindle drags the wheels round the pan, and because a wheel's inner edge travels a shorter circle than its outer edge the rim both rolls and skids — it crushes by weight and grinds by the skid.
  • Drawn with Ø50 × 16 runners at 50 mm radius on a Ø5 × 150 axle, Ø12 spindle, Ø160 pan; each runner touches the pan floor along a line (contact only).
  • Brown's No. 375 (chasers, edge runners, for crushing and mixing); mortar, pigment and gunpowder mills.
  • Parts (each has its own page): edge-runner-pan-d160, edge-runner-d50x16-b5, edge-runner-spindle-d12x100, linear-shafts-h6.
  • Brown's movement No. 375 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

Edge-runner (chaser) mill: two rollers on one axle rolling round a pan size chart

parametervalue
runners2 × Ø50 × 16
track radius50 mm
panØ160
spindleØ12 × 100

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. 375: figure, his text and an animationwebPublisher'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

edge-runner-mill-mechanism-assemblyAssembled mechanism, all parts placed at one pose (STEP keeps each part separate)STEP · 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=edge-runner-mill-mechanism

Edge-runner (chaser) mill: two rollers on one axle rolling round a pan, isometric render of a generated part
Render of edge-runner-mill-mechanism-assembly from the free STEP; not to scale.

Fits with

Edge-runner pan Ø160, 8 mm rim, Ø12 centre bore, isometric render of a generated part
Edge-runner pan Ø160, 8 mm rim, Ø12 centre bore160.0×160.0×22.0 mm★ 1 file
Edge runner (chaser) Ø50 × 16, Ø5 bore, isometric render of a generated part
Edge runner (chaser) Ø50 × 16, Ø5 bore50.0×50.0×16.0 mm★ 1 file
Vertical spindle Ø12 × 100 with a Ø5 cross hole 35 mm up, isometric render of a generated part
Vertical spindle Ø12 × 100 with a Ø5 cross hole 35 mm up12.0×12.0×100.0 mm★ 1 file
Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long, isometric render of a generated part
Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long10 sizes★ 70 files

Questions

How does an edge-runner mill crush?

Two heavy wheels on a horizontal axle that passes through a vertical spindle: turning the spindle drags the wheels round the pan, and because a wheel's inner edge travels a shorter circle than its outer edge the rim both rolls and skids — it crushes by weight and grinds by the skid.