Genuine question to the board - that Shimano freewheel looks like it has a very similar splined fitting to the cassette lockrings, but do you use exactly the same tool for each ?
This link suggests that the freewheel removal tool is DIFFERENT to the much more common cassette lockring tool:
https://www.parktool.com/blog/repair-help/determining-cassette-freewheel-type
I'm thinking that even if the splines match the cassette lockring tool may not be strong enough to remove a freewheel - the lockrings use a defined (and moderate) torque - freewheels, not so much
Or if you have a good vice attached to a very solid workbench put the freewheel remover in the vice and pull on the wheel rim to unscrew the freewheel.
Genuine question to the board - that Shimano freewheel looks like it has a very similar splined fitting to the cassette lockrings, but do you use exactly the same tool for each ?
This link suggests that the freewheel removal tool is DIFFERENT to the much more common cassette lockring tool:
https://www.parktool.com/blog/repair-help/determining-cassette-freewheel-type
There's some rough looking ones on ebay too
http://rover.ebay.com/rover/1/710-5...0001&campid=5338728743&icep_item=333647556249
Seller advises using a vice!