AG012 Harlequin Jennings Pattern Set of Nine + Extras

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AG012 Harlequin Jennings Pattern Set of Nine + Extras


Bargain time! A half set (1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4, 7/8, 1 inch) of functionally excellent Jennings pattern bits by various makers, plus a double ended screwdriver bit, rimer bit for enlarging small holes in thin material, rose countersink for soft metals, snail countersink for wood and 1-1/4" improved centre bit - 14 bits in total.

Supplied in a new British made 18 pocket canvas auger roll

In 1855 Russell Jennings patented his double twist bit with cutting spurs. Widely regarded as the best bits for use in hardwoods, the fine thread version soon became popular with furniture makers and remains so to this day.

The double twist rests evenly on opposite sides of the hole, so the bit naturally wants to stay straight. The cutting lips release a circle of timber just ahead of the main cutting edge so that the main edges can plane out the waste with ease.

As with all self feeding augers, the best way to get a clean exit hole is to clamp a block of scrap on the exit side so that the surrounding timber is backed up and the lead screw still has something to bite into.
You don’t need an auger bit file for Irwin or Jennings augers, any thin smooth file with a safe edge will work. I use a Bahco 5” warding file with the edge teeth ground off, which gets to all the edges of all the sizes and leaves a nice smooth surface.



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