Tools

The Turner’s Cube: Classic machinist’s exercise

The Turner’s Cube: Classic machinist’s exercise

This lovely object is more than just an interesting gewgaw: It’s called a “turner’s cube”–so named, I think, because it is a challenge for one who turns on a lathe rather than eponymously–and according to Bob Warfield, “[i]n the old days, novice machinist’s [sic] were handed one and told to work out how to make one of their own.” Bob’s got a cool page describing his efforts to make one manually and then using a CNC mill, with some bonus commentary on this thread by CNC Zone member widgitmaster, who made the cube pictured above, using the jig pictured above, on a big engine lathe. Beautiful!

Make a spooky jack-o’-lantern, quick

Make a spooky jack-o’-lantern, quick

Halloween’s almost upon us, and it’s time to carve up some jack-o’-lanterns. I have great respect for people who take hours to lavishly carve pumpkin masterpieces. I also have very little time to make my own pumpkins. My kids and I just want to get them carved, set a candle inside, and move on to roasting the seeds as quickly as possible. So I decided to forgo the knife and use a cordless Dremel Multi-Max oscillating tool to make quick work of Mr. O’Lantern. Follow the steps below and you too can crank out an army of chilling, thrilling Halloween pumpkins in no time.

How-To:  Make cheap castable silicone from caulk

How-To: Make cheap castable silicone from caulk

Turns out, though, that mixing in some cornstarch accelerates the drying process; just how much depends on how much starch you add. The author recommends starting with a 1:1 mix. I’m not sure about his explanation that the process works because the hygroscopic starch carries moisture into the internal volume of the silicone, but in any case there are probably other additives that will accelerate the process as well as or better than cornstarch. You might even find one that’s not opaque and allows for translucent castings.