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Meanings of countersink bit in English

A bit for enlarging the upper part of a hole.

Synonyms
Examples for "countersink"
Examples for "countersink"
1
Button head bolts are often used on thin holds that have no countersink.
Rock and Ice Magazine
2
Worn somewhat into the soil, this road served as a countersink and strengthened the position.
Destruction and Reconstruction: / Personal Experiences of the La...
3
The valves, C, and their seats, B, bored with a countersink bit, are plainly shown.
The Boy Mechanic, Volume 1: 700 Things for Boys to Do
4
Maximum stress was found on the lateral border of the number 5 countersink of the plate.
Pubmed
5
Drill and countersink two smaller holes for 2-in.
The Boy Mechanic, Volume 1: 700 Things for Boys to Do
1
The holes can be counterbored for the heads and then plugged.
Mission Furniture: How to Make It, Part 3
2
To make the matter worse, quite a number of the wheels were found to have been counterbored about ½ in.
Scientific American Supplement, No. 623, December 10, 1887
3
Today I counterbored the four holes in the fenders that will have 3.5 machine screws inserted to act as axles for the wheels.
Wired
Usage of countersink bit in English
1
The valves, C, and their seats, B, bored with a countersink bit, are plainly shown.
The Boy Mechanic, Volume 1: 700 Things for Boys to Do