Bosch GAM 220 MF
The Bosch GAM 220 MF Professional Digital Angle Measurer provides rapid calculation of simple and compound mitre angles for joinery, structural framing, and interior fit-outs. This instrument integrates a high-precision electronic sensor with a 40cm mechanical arm to deliver the accuracy levels required for complex trim and roof construction.
Built for the Job
This measuring tool is a standard requirement for site supervisors and finish carpenters who handle high-volume crown molding or cabinetry installations. By eliminating manual trigonometric calculations, the unit reduces the risk of material waste on expensive timber or composite profiles. The integrated compound mitre function allows a user to input a corner angle and immediately receive the exact mitre and bevel settings for a saw. This is particularly useful when working with non-square walls frequently encountered in renovation projects. The 40cm arm length provides sufficient leverage for stable placement against studs or rafters while remaining compact enough for toolkit storage.
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Transferring precise angles to mitre saws for skirting, architraves, and decorative trim.
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Calculating rafter cuts and roof pitches during structural timber framing.
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Verifying site geometry against blueprints for facility managers and inspectors.
Product Highlights
- Compound Mitre Calculation
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The onboard processor automatically computes the mitre and bevel angles for compound cuts without requiring additional external charts.
- Display and Visibility
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- Illuminated flip-up display ensures readability when working in dark corners or overhead.
- The screen automatically rotates to maintain a correct reading orientation at any angle.
- Mechanical Locking
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A heavy-duty locking screw secures the arm position to allow for physical angle transfer between workpieces.
Technical Specifications
| Specification | Detail |
|---|---|
| Measurement Range | 0 – 220° |
| Angle Accuracy | ± 0.1° |
| Vial Accuracy | ± 1 mm/m |
| Calculation Accuracy | ± 0.1° |
| Arm Length | 40 cm |
| Power Supply | 4 x 1.5 V AA |
| IP Protection | IP 54 |
| Weight Approx. | 1.2 kg |
What’s Included
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1 x Bosch Professional Angle Measurer
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4 x 1.5 V LR6 (AA) Batteries
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1 x Protective Storage Bag
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1 x Arm Extension Accessory
On-Site & Workshop Notes
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Use the arm extension when measuring in tight spots where the standard 40cm frame cannot sit flush against the reference surface.
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The Hold function allows you to freeze a reading on the display when the screen is not visible during the actual measurement.
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Ensure the pivot point remains free of sawdust and grit to maintain the ± 0.1° factory accuracy rating during long-term site use.
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The device enters an automatic power-save mode after 30 minutes of inactivity to extend the 80-hour battery runtime.
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