Thread: Nice little Jig

Wish I had found that 6 month ago!

I'm rather partial to the router table also linked on that page - very handy gizmo for the workshop!!

Oh, and the hole-drilling jig is an absolute marvel of simplicity - well done to the inventor of that one!!

Neat jig!!! but I winced everytime he made a cut on that TS.

Thanks W, great jig and simple. I thought the same about the TS, looks even worse at high speed. That clip also reminded me I must get myself a drill press.

Originally Posted by 3 toed sloth

Thanks W, great jig and simple. I thought the same about the TS, looks even worse at high speed. That clip also reminded me I must get myself a drill press.

Reminds me of lots of things>

Ok made an MDF jig first side 2nd side spacing out by up to 1/2" on last few holes flaming idea used same holes on Jig.

So set about making 2nd jig using Jarrah same thing first side 2nd side 5/8th the last hole is out in line up with the other side.

So have to fill them and try again.

Any ideas. what caused it.

Maybe too much slack in the hole the pin is inserted into? Or you are like me and start at one end for one side and the other end for the other side, and then wonder why it doesn't meet in the middle?

Originally Posted by Black Cat

Maybe too much slack in the hole the pin is inserted into? Ths seems to have been the most possible cause but not sure.
Or you are like me and start at one end for one side and the other end for the other side, and then wonder why it doesn't meet in the middle? Thats how I just fixed the worst one

I didn't use such a thick block as in the video 19mm but also only used a stubby 3/16 drill bit and one as the pin locator.

I back filled with dowel glued in and redrilled the misaligned holes. I will admit having drilled shelf support holes before marking them out and drilling without the jig was way easier and only a smidge off alignemt.

Well done you. I am learning from your experience in preparation for building my own floor to ceiling bookshelves (one the room in question has been brought up to a standard where such fripperies can become a priority ...)

Originally Posted by Black Cat

Well done you. I am learning from your experience in preparation for building my own floor to ceiling bookshelves (one the room in question has been brought up to a standard where such fripperies can become a priority ...)

Nice to be of service.

So, do we know "Andrew Fairbank from New South Wales, Australia" who sent in the tip? Is he one of us? Does he have a forum identity .......?
well done Andrew,
fletty

I hate to rain on your parade, but point-to-point measurements and gages are prone to accumulation of tolerance errors. And each time you drill a new hole, the pilot hole in the gage may become larger because of drill wobble. Eventually, the error buildup places the last holes seriously out of position.

It's better to make a master gage containing all of the hole locations, which may (or may not) need to be equally spaced - whatever the project requires. The gage should also have (a) locating block(s) to place it on the workpiece. In the aircraft industry, the gages are even fitted with hardened bushings to eliminate or reduce hole enlargement. Any errors will be in reference to the global origin (because of the locating blocks), and fault-tolerant design can make such errors unimportant.

Nawm (Abrams, NYW) had an episode in which he showed construction and use of such a gage for shelf pins. It might be on the PBS website.

Cheers,
Joe

Originally Posted by fletty

So, do we know "Andrew Fairbank from New South Wales, Australia" who sent in the tip? Is he one of us? Does he have a forum identity .......?
well done Andrew,
fletty

One reason I posted this so far haven't heard a peep.

Originally Posted by joe greiner

I hate to rain on your parade, but point-to-point measurements and gages are prone to accumulation of tolerance errors. And each time you drill a new hole, the pilot hole in the gage may become larger because of drill wobble. Eventually, the error buildup places the last holes seriously out of position.

Took that into consideration pilot pin hole still tight drill hole negligable amount.

It's better to make a master gage containing all of the hole locations, which may (or may not) need to be equally spaced - whatever the project requires. The gage should also have (a) locating block(s) to place it on the workpiece. In the aircraft industry, the gages are even fitted with hardened bushings to eliminate or reduce hole enlargement. Any errors will be in reference to the global origin (because of the locating blocks), and fault-tolerant design can make such errors unimportant.

Nawm (Abrams, NYW) had an episode in which he showed construction and use of such a gage for shelf pins. It might be on the PBS website.

Cheers,
Joe

Thanks Joe may have to make one from alli or steel and see what happens when next I require it.