Picture of Bike Crank Removal Tool
This Instructable will show you how to build/ machine your own bike crank removal tool from SCRATCH and for under 3.00 $!!

I know that Park Tool has their own crank removal tool but, WHAT IF you want to make your own??

Step 1: Materials & Tools

Picture of Materials & Tools
•1.375 inch x 1" Dia   6061 aluminum solid round 
•.125 inch x .5 Dia      1045 mild steel solid round
•2 inch x 5/16 - 18       Grade 8 bolt

•Metal lathe (thread cutting ability)
•Metal files
•Round End mill - (5/8)
notingkool2 years ago
Nice work. I also made a couple ones. I remember that my first one, had a M22x1 thread, and i doens't fit into the crank, the i made anotherone, but making a 21,6x1 thread,
Also, why did you use aluminum for the body? and why a 5/16 screw?
Most of comecial pullers are made with steel and use a 10mm screw.
sw.machinist (author)  notingkool1 year ago

The reason I used aluminum was because there are plenty of complete threads on the puller that engage with the crank threads, so steel is unnecessarily strong. Plus aluminum is easier to work with for prototyping - it's softer than steel, but plenty strong enough.

The screw size (5/16-18) was because I'm in the USA and I deal mostly with standard SAE. And course threads are less likely to strip out.

Yeah, aluminum it's quite easy to work. If it's an aluminum alloy like 7075 it will work. When i made my owns crank pullers i use steel just because i need it for steel cranks (i made it for me and a friend who is a bicycle mechanic in a bike shop). What i realize is that the screw must have a fine thread, because you need less torque to extract the crank.
Maybe a 24tpi screw will work better for your tool ( I use a 3/8"x24tpi screw once and work like the M10x1)

This is so cool! Thank you for sharing this.