The drill bit locates the punch first square the punch to the surface of the workpiece. This is a review of the veritas square hole punch available individually or as a set of six ranging in size from 316 to 12 by sixteenths.
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Just drill a hole slightly undersize 364 smaller than the size of the punch and position the punch over the hole.
Veritas square hole punch. Use the product code 50k5920. Punch tips are machined and ground from hardened o1 tool steel rc 48 52 and combined with shanks of softer steel. Increments and square up holes as deep as 38 in.
Square hole punches i wonder if these could be made by partially drilling into the end of a square piece of steel stock. For more on the hollow square punches see my previous blog. Slide the punch down over the drill bit.
Lang demonstrates a tool that allows you to create accurate square holes for wooden pegs that are often found in greene greene furniture. Install square pegs in a jiffy. As you know the diameter of the round hole in each square hole punch is 364 less than the size of the punch.
This is a review of the veritas square hole punch available individually or as a set of six ranging in size from 316 to 12 by sixteenths. I think i understand why. Ensuring that the drill bit diameter was greater than the bar stocks dimensions.
The hollow square punches will be available from lee valley tools very soon. They consist of a precisely machined tip in six sizes from 316 to 12 square ground from hardened o1 tool steel and threaded onto a hollow shank machined from a milder steel to absorb shock when you tap the punch over the hole. With a few hammer taps it cuts the hole square with smooth walls and 900 corners.
I must not have been the only one doing this because veritas is selling an entire set of hollow chisel punches for squaring the tops of holes. To 12 in in 116 in. The square hole punches come in six sizes ranging from 316 in.
If the hole were larger the thickness and strength of the wall of the punch would be compromised. Lee valley square hole punches. 11 11 2011 0727 am by vipond33 23 comments.
Lee valley square hole punches. Drill the hole with the appropriately sized drill bit punch dimension minus 364. Remove the punch for a perfectly square crisp hole.
Remove the drill bit from the drill and insert the drill bit into the hole. If it were smaller it would be too hard to drive the punch.
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