Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Lee Michael P Peters Rickey J Thomas Craig Schell Robert Gehret Scott Muhlbaier Current Assignee (The listed assignees may be inaccurate. ( en Inventor Aland Santamarina Joseph Kelleher Darren B. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number EP11165571A Other languages German ( de)
#Drill bit depth gauge pdf
Google Patents Depth Gauge for Drill Bitĭownload PDF Info Publication number EP2386373A2 EP2386373A2 EP11165571A EP11165571A EP2386373A2 EP 2386373 A2 EP2386373 A2 EP 2386373A2 EP 11165571 A EP11165571 A EP 11165571A EP 11165571 A EP11165571 A EP 11165571A EP 2386373 A2 EP2386373 A2 EP 2386373A2 Authority EP European Patent Office Prior art keywords drill bit cap depth gauge depth sleeve Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents EP2386373A2 - Depth Gauge for Drill Bit This project turned out to be an excellent addition to my drill press, I am only sorry I didn't do this years ago. For absolute accurate readings, I would do that, but for drilling pocket holes for machine nuts and bolts and T-nuts, that kind of precision is not needed. The other thing I could have done was to measure the nut using my better quality calipers but I wanted to see how close I could estimate without it. I measure the machine nut, which was slightly wider than 1/4" and estimated that the hole would need to be. at least that is measurable, but it allows the caliper to move freely and not bind, which hopefully means, even the plastic one will last a long time. It doesn't make any difference to the readings. The caliper was attached finger tight to the clamps, but there is still enough room for the caliper to pivot ever so slightly as it rides up and down. removed the brackets and drilled the holes where they were marked with the felt pen. I then measure where the corresponding holes would need to be on the brackets. I measured closely and rechecked then finally make a tiny hole in each side of the jaws of the digital caliper. Next was the fiddly part drilling some tiny holes in the jaws of the plastic caliper, and some matching holes in the brackets. I attached it to the collar using a hose clamp and was impressed just how solid it was. After making a few measurements and bending some scrap steel that I had, by pure lock the bracket turned out perfectly. The second bracket that would be the movable one, needed to be attached to the collar on my drill press, just above the where the drill press chuck is. I used self-drilling screws, and even into the cast body of my drill press, these screws drove in easily and quickly. I attached the fixed bracket to the body of my drill press, the area where there are no moving parts. With a bit of modification, I was able to make the final brackets to tolerances that would work nicely on my drill press. I, first of all, made a template of what that brackets should look like, just to see if they would fit and if they would work. I needed some metal that wasn't going to flex so I stopped in at the Metal Supermarket, and as usual, the nice folks there took a few minutes and found me an off-cut that would work. I needed to make some sort of a holder for the caliper and after examining my drill press I came up with a concept that should work. Here is a version of an inexpensive Digital Caliper available from Amazon I decided since this was an experiment, that I would use a less expensive digital caliper, and I know I have seen them for closer to $10 - $12. that made me think that I can zero these things at any distance so it should be feasible to mount this to my drill press. and what triggered this thought was that I was using my digital caliper to measure the thickness of a machine nut and for some reason, the caliper was "zeroed" at a high number and when I went measure the nut, it went into a minus reading. Like most drill presses, mine has a depth stop which is great for repeatable use in the same wood at the same depth, but when I want one or 2 accurate holes, it is very difficult to do anything quickly. I am always amazed how many times I use this machine in a day, but the one thing the bulk of drill presses lack is any kind of a detailed depth gauge. The drill press is one machine in my shop that I cannot do without.
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