Badzilla
New Member
For anyone who is stuck with that sort of single speed freewheel, the kind with only two narrow notches. Apparently there is a tool (TL-FW40) for removing Shimano SF-1200 freewheels, but there is a cheaper and better way.
Requirements...
...a left side bottom bracket cup. I used one from a cheap looseball type that was replaced with a cartridge.
...a rotary tool
...a thin nail
How to make it...
...cut a slot in the cup, about 1/4 inch down through one side of the threads
That's all there is to it. The slot needs to be just thick enough so that the thin nail can slide through it. No precision required, anybody who can use a rotary tool should have no trouble.
Screw the cup into the Shimano SF-1200 so that you can see the slot almost disappear in either one of the freewheel's two notches. Stick the nail in there. Now that your cup is locked tight into the freewheel, use your cup removal key (like a Park Tool BBT-32C) to unscrew the freewheel.
Requirements...
...a left side bottom bracket cup. I used one from a cheap looseball type that was replaced with a cartridge.
...a rotary tool
...a thin nail
How to make it...
...cut a slot in the cup, about 1/4 inch down through one side of the threads
That's all there is to it. The slot needs to be just thick enough so that the thin nail can slide through it. No precision required, anybody who can use a rotary tool should have no trouble.
Screw the cup into the Shimano SF-1200 so that you can see the slot almost disappear in either one of the freewheel's two notches. Stick the nail in there. Now that your cup is locked tight into the freewheel, use your cup removal key (like a Park Tool BBT-32C) to unscrew the freewheel.
