Instructables

Indestructable Tool Crank Handle Made From a Bicycle Crank Arm!

Featured
Picture of Indestructable Tool Crank Handle Made From a Bicycle Crank Arm!
My favorite tool  probably has to be my drill press. It seems like any project I do involves the use of my drill press, but the joy of using it has been somewhat dampened by the fact that the vertical adjustment crank, being made of cheap plastic, broke quite easily.
I've been using this uncomfortable, hard to use crank for several years simply out of laziness., but I finally got an idea for a simple solution to fix it.

If you find this instructable useful, please vote for me in the indestructible contest! I really appreciate it!
 
Remove these adsRemove these ads by Signing Up

Step 1: Find a Bike and Take It apart!

Picture of Find a Bike and Take It apart!
I bought an old steel road bike a few years ago for 5 bucks. It has served me well, but I decided it was time to retire it due to the fact that new tubes and tires would cost more than the entire bike is worth.
But it is not going to waste. The first thing to be recycled is one of the crank arms. It fits almost perfectly onto the height adjustment shaft, It's made of nice tough steel, and it's shiny! Who could ask for more?

Step 2: Cut the Crank to size!

Picture of Cut the Crank to size!
I began by cutting the crank to be roughly the same length as the old plastic one. This stuff was stronger than I thought. I started with a hacksaw and got pretty much nowhere. It was no match for a grinder cutting wheel though. I smoothed it off and even used a wire brush to shine up the chrome a bit.
Baytonian12 months ago
Great repurposing idea. There is something really satisfying about using a tool (in this case the drill press) to fix itself. I will be able to utilize the free spinning knob part idea to fix the broken crank handle on one of my drill presses (arm is still good)... Thanks for posting. Check out my drill press table enlargement I posted a week ago for another drill press project. Regards, Baytownian...
3366carlos1 year ago
nice, u shulda kept the pedal to keep the original look.
24T1 year ago
Great idea. I have the same problem with my drill press. It just broke 2 weeks ago & I've been reluctant to use it since it is so hard to crank with half of a handle. I will be making this. Thanks!
ArborPress (author)  24T1 year ago
A broken handle just ruins the experience, doesn't it? I'm glad you like it!
Well done... I have a wind-up clothes line with a broken handle.... The mower man caught it on his pocket as he went past.... Stand aside---- pedal arriving..
mlmccauley1 year ago
Excellent repurposing of "junk". Clever idea.
streetrod51 year ago
Gaaah! How did you break into my garage? That old plastic crank arm looks just like the Cranky McCrankerson plastic crank arm on my drill press - mine is broken in the same cranky crank place! Thank you for this 'Able, I will be fixing my drill press this weekend! I've got a few extra nylock nuts, and one is sure to fit the new crank handle.
ArborPress (author)  streetrod51 year ago
No need, I already broke into your garage and fixed it for you!
manuka1 year ago
Top marks for -ah- "re-cycling". I need to make a similar crank for a "Smart Drive" based demo hand generator, but had never pondered adapating a bike pedal!
Great job! Thanks for sharing this innovative upcycle of a crank!