Posted by BillS on March 08, 2008 at 13:21:04:
In Reply to: Gear keyway posted by Malcolm Brown on March 07, 2008 at 18:42:49:
Hi Malcolm,
Cut and paste the link shown below:
http://www.oldengine.org/members/diesel/Tables/Key6.htm
This shows a table which refers to a BS No 4 woodruff cutter designation. It has all the dimensions I think you would need.
Hope this helps.