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Digital Rechargeable Propeller Protractor

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Part# 12-04974


The Protector is a precision, highly accurate and simple to use device for checking, setting or changing propeller pitch. The resolution and repeatability is 0.05 degree and the accuracy is +/- 0.1 degree. It is powered with a standard 9 volt battery with approximately one year use life.

The Angle Cube can be used for other angle measuring applications such as checking and adjusting wing incidence, rotorcraft blade angles and tail-dragger ground angles. Aside from aircraft or airboat use, the gage can be used for measuring or setting table saw blade angles, machining or drilling angles or any other application requiring precision angle measurement. Magnets on three sides can be used to hold the unit to appropriate surfaces.

When the Angle Cube is magnetically attached to the protractor clip, the unit becomes a simple and accurate tool to measure blade angles.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


In The Box

  • iGaging 3rd generation AngleCube
  • Rechargeable battery (installed)
  • Charging Cable
  • Frequently Purchased With
  • Customers Also Viewed


5 stars on Competition Aircraft after market service! I had an issue and they took care of it immediately. Well worth buying this product for them on that basis alone. Oh, and the protractor works great as well.

Alex R
February 17, 2021

Very accurate. I used my laser level on a tripod to set measurements for vials and mounting bracket.

Noel O
November 22, 2018

Best and most accurate way to set prop pitch

Glenn E
October 2, 2017


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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