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Millers Falls No.97 (Gear Change Mechanism) | by Rhyolith
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Millers Falls No.97 (Gear Change Mechanism)

The Mighty No.97, one of the most sophisticated Breast Drills on Earth and twin to the No.87.

 

Design

 

Weight: 3.2kg (Auxiliary breast plate adds 400g)

Length: 445mm

Crank Wheel Diameter: 130mm

Chuck Type: Protected Spring

Chuck Capacity: 12mm

Chuck External Diameter: 38mm

Frame: Malleable Iron

Handle(s): Hardwood

Mechanism: 4-Pinion 2-Gear Ratcheting, Ball Thrust Bearing

Special Features: Ratchets, 2-Gears, Adjustable handles, Auxiliary Breast plate.

 

Model Information

 

Dated: 1922 - 1931

Production period: 1912 - 1944

Patent: AUG.4.1911 AUG 6.1912

Made by: Millers Falls Co., Massachusetts, USA

 

In depth description and Ratchet Modes info:

www.flickr.com/photos/123749911@N08/27097893344/in/album-...

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Taken on July 18, 2016