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Millers Falls No.13A (dismantled) | by Rhyolith
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Millers Falls No.13A (dismantled)

This is a high speed breast drill.

 

There are relatively few examples of single speed breast drills, this being one of them. Despite this the No. 13 was an expensive drill in its time and the Millers Falls Co. openly advertised this: “really the most expensive Breast Drill in the market.” (oldtoolheaven.com/breast_drills/featuredbd.htm), this was to promote the drills high quality. Indeed this build quality is still clear today. The mechanism is very smooth and solid, easily taking up heavy load thanks to there being nearly no play in the drive gear, which is in turn backed up by a solid 2-pinion arrangement.

 

The tool was apparently intended for drilling through thick pieces of metal, something that would benefit for the extra speed that could be achieved with a high gear ratio of 4 1/2 to 1 (oldtoolheaven.com/breast_drills/featuredbd.htm). The extendable handle allows a lot of power to be put in to this tool, indeed when coupled with the high gear ratio the potential power output the No.13A (and No.13) is quite possibly the highest of any breast drill available. This may surprise many initially as for a breast drill it is quite stubby (small).

 

Design

 

Weight: 2.32kg

Length: 395mm

Drive Wheel Diameter: 143mm

Chuck Type: 2-Jaw

Chuck Capacity: 12mm brace bits

Chuck External Diameter:

Frame: Steel

Handle(s): Hardwood

Mechanism: 2-Pinion

Special Features: Large drive gear, single gear, extendable crank handle, spirit level on frame

Model Information

 

Dated: 1912 - 1917

Production Period: 1912 - 1917

Patent: unknown

Made by: Millers Falls Co., Massachusetts, USA

 

Note: An often under valued drill, few people seem to know how good quality the No.13A is, this may be due to its initial appearance being reminiscent of cheaper tools. Hence these often go for very little at various sales relative to other premium breast drills.

 

References

 

oldtoolheaven.com/index.html

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Taken on July 20, 2016