Nutshell & Hairy_ass
Hey, I was just fiddling around with a broken coffee grinder and thought, why not turn it into a mini saw? Ever repurpose something ordinary into a nifty gadget?
That sounds like a cool hack! Coffee grinders already have a motor and a bit of a shaft, so itās a good base for a small saw. Iāve turned a broken toaster into a mini hotplate and used an old phone battery to power a tiny LED light in a paperclip frame. Whatās the grinderās motor speed like? You could add a blade holder or a quickārelease gear. Want to swap out the blade for something sharper or tweak the speed control?
The motorās about 1200 rpm on a full load, but itās a bit capricious. Iāll slip a 10āinch blade on the shaft, keep the old gear, and tack a small potentiometer to a scrap piece of acrylic so I can dial it down to about 800 rpm for a safer cut. If the bladeās too dull, swap in a spare from the old wood latheāgot a spare there from a friend. Just watch out, the grinderās teeth donāt like sudden stops, so Iāll add a clutch plate. Easy, but donāt try this on a hot day.
Sounds like a slick plan! Adding that clutch plate should keep the grinder happy, and dialing the speed with a potentiometer is a smart safety tweak. Just make sure the bladeās secure before you startāno sudden jerks. Do you have a micrometer or calipers handy to check the blade thickness? Itāll help you keep the cut precise. Good luck, and keep me posted on how it goes!
Got a set of old calipers from the garage, so Iāll measure the blade first. If itās off by more than a millimetre Iāll file it down. Once the bladeās snug, Iāll test the clutch, run a quick speed check, and then see how it cuts through a piece of plywood. Will let you know if the grind comes out smoother than the coffee. Happy hacking.
Thatās the spiritāprecision first, safety next, and a little playtime in between. Let me know how the plywood turns out; Iāll be rooting for a smoother grind than a latte!
Got the plywood in the corner, set the grinder to 800 rpm, clutched it tight. Sawed a straight line and the edge came out cleaner than a fresh latte. Turns out the blade holder workedāno wobble, just a clean cut. Thanks for the encouragement! Next up: a tiny drill with a repurposed watch motor. Keep an eye out.
Thatās awesomeāsounds like youāve nailed the cut! For the watchāmotor drill, just remember the motorās low torque; you might need a gear reduction or a small spur gear set to step it up. Have you got any small drill bits that fit the shaft? Keep me posted when you start, and Iāll be cheering you on!
Got a spare brass drill bit, the one from the old router, thatāll fit. Iāll mill a little gear tooth on the motor shaft and hook a 4ātoā1 spur set up on a cheap bike chain, just to bump the torque up a notch. Will keep the bit snug with a tiny clamp. Start it up soon and let you know if it drills through wood like a hot knife through butter. Cheers.
Sounds like a solid planāgear it up, clamp it tight, and youāll have a pocketāsized drill before long. Let me know when itās spinning; Iām excited to see if that brass bit turns into a butterāslicker! Cheers.
Just spun it up; the motorās whining like a bored lawnmower, but the gear set keeps it steady. The brass bitās in place and I can feel the chuck tighten. Will try a scrap of plywood in a couple of minutesāif it threads clean, Iāll call it a butterāslicker. Hang tight for the live demo.