Beam Compass / Trammel, Adjustable Circle Drawing Tool for Large Diameters (tramel)
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Adjustable rod compass for large circles, fits profiles 20–50 mm and tools Ø3–20 mm
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Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution — Noncommercial
Detailed Description:
This rod compass is a practical tool for marking large circles on wood, metal, or plastic. It clamps onto a profile such as a wooden strip or a spirit level and allows diameters from approx. 85 mm up to over 4000 mm – depending on the length of the profile.
Technical Specifications:
Profile clamping range: 20–50 mm
Working diameter: approx. 85 mm to 4000 mm
Tool clamping range: Ø 3–20 mm
Clamp S: Ø 3–12 mm
Clamp M: Ø 10–20 mm
The clamps and knurled nuts feature a spherical seat, allowing flexible adjustment. Depending on print quality, slight surface sanding may be required.
Recommended Tools:
Scriber, pencil, or scalpel.
To set the radius, simply use a ruler and position the tip at 10 mm, then check the radius on a sample surface.
Standard Parts:
2 × Hex nut ISO 4032 M6
1 × Hex bolt ISO 4017 M6 × 35
1 × Hex bolt ISO 4017 M6 × 60
Print Settings:
Material: PLA
Nozzle: 0.4 mm
Layer height: 0.2 mm
Infill: 50 %
Robust, modular, and ideal for precise work on large diameters.
More info: https://emkatech.ch/en