Toolbox

Son of Know Your Bolts

Son of Know Your Bolts

In the comments on yesterday’s piece about Bolt Depot’s poster of fasteners, a reader, JamesB, wrote: I would encourage budding young fabricators to also take a look at the bolt grade charts and get an inexpensive universal thread gauge. For found fasteners, the grade markings help differentiate metric from SAE, and the thread gauge helps […]

Drilling Square and Hexagonal Holes

Drilling Square and Hexagonal Holes

Turns out it’s also possible to drill hexagonal hole using a very similar tool based on the Reuleaux pentagon. The video immediately above, again from jacquesmaurel, shows a tool he describes as a “Vika attachment,” mounted in a lathe, boring an hexagonal hole in a piece of stock. The video below, part of the Wolfram Demonstrations Project, illustrates the process.

Parts Tray + Fruit Wedger Blade = Sorting Parts Tray

Parts Tray + Fruit Wedger Blade = Sorting Parts Tray

I love magnetic parts trays. When I’m taking something apart, using one for the screws and other tiny metal bits is one of the best things I can do (together with taking pictures as I go) to make sure that it all goes back together again more or less as it’s supposed to.

So the last time I was disassembling an appliance for repair (a video projector, in this case), and I was carefully arranging the screws for each subassembly in a separate little pile in my parts tray, it occurred to me that it’d be nice to have a magnetic parts tray with compartments for this purpose. And when I was imagining what the dividers would look like, a shape like the blade of a fruit wedger occurred to me.

For some reason, I have two fruit wedgers. I never use a fruit wedger, but when and if I ever do, I am confidant that one will meet my needs.

So I busted the plastic off ring off of one of them and, with a bit of filing to round the ends of the blades, discovered that the blade assembly fit pretty well into my 4? magnetic parts tray. And actually works pretty well as a divider, too.