Chain Guard Plate (65 mm sprocket bore)

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Bounding box: 160.0 × 110.0 × 5.0 mm
Engine: Precision B-rep
Parameters: 10
Published: September 20, 2026

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The prompt

Python 3.11.14 | packaged by conda-forge | (main, Oct 13 2025, 14:32:40) [Clang 19.1.7 ] on darwin Type 'help', 'copyright', 'credits' or 'license' for more information. >>> # Gui.runCommand('Start_Start',0) >>> # Gui.runCommand('Std_Workbench',7) >>> # Gui.runCommand('Std_ViewStatusBar',1) >>> ### Begin command Std_Open >>> from freecad import module_io >>> module_io.OpenInsertObject("Mesh", "/Users/mor/Downloads/Chain_guard.stl", "open") >>> >>> # App.setActiveDocument("Unnamed") >>> # App.ActiveDocument=App.getDocument("Unnamed") >>> # Gui.ActiveDocument=Gui.getDocument("Unnamed") >>> # Gui.SendMsgToActiveView("ViewFit") >>> ### End command Std_Open >>> # Gui.Selection.addSelection('Unnamed','Chain_guard','',133.179,97.5849,9.56) >>> # Gui.Selection.clearSelection() >>> # Gui.Selection.addSelection('Unnamed','Chain_guard','',136.322,91.5619,8.32308) >>> # Gui.Selection.clearSelection() >>> вот в этом файле надо отредактировать, пустая окружность внутри должна быть диаметром 65мм

Parameters

Name	Value	Range
Sprocket bore (given)	65 mm	20 – 100
Sprocket end OD	110 mm	80 – 180
Tail end OD	50 mm	20 – 100
Centre distance	80 mm	40 – 200
Plate thickness	5 mm	2 – 20
Outer corner radius	3 mm	0.5 – 10
Mounting hole count	4 pcs	2 – 12
Bolt circle dia	88 mm	70 – 150
Mounting hole dia	6.6 mm	2 – 16
Tail end hole dia	8 mm	2 – 20

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.

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