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Not sure if you’ve sharpened your tools or drill bits to the perfect angle?  This universal grinding gauge from Silverline Tools will help you check.

Made from heavy-duty 14ga stainless steel, the grinding gauge can check 55°, 60°, 90°, and 120° internal and 60°, 90°, and 120° external angles.  Silverline manufactures their tools for the UK so the etched graduations read in metric.

Five bucks will buy you this gauge at Jack’s Tool Shed.

Universal Grinding Gauge [Silverline Tools]
Universal Grinding Gauge [Jack's Tool Shed]
Via Amazon [What’s This?]

 

3 Responses to Universal Grinding Gauge

  1. Kieran says:

    I see no external 120° and no marked external 90°, the presumed ones might not be exact. Also, why not make the shortest rule start from the edge and why two 120° angles, why not make the rightmost one more obtuse or acute depending on what applies most? Everything I own is sharpened by eye, tools that need accuracy don’t get used enough to warrant sharpening so maybe I’m just misunderstanding this thing.

  2. Jasin says:

    Fred, that gauge has no way to measure the accuracy of the center point of the ground bit. The most important measurement on a ground bit. Angle is only approximate and should be changed according to the hardness of the material.
    Just my two cents

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