26-03-2021, 09:54 AM
Without checking out old posts I forget who knows what. So for whoever...
A fixed reamer provides only one size and normally only readily available in set intervals; often a crank finished or worn below the original exact size. With all reamers alignment is tricky and easy to introduce chatter marks, esp with the adj type which require patient clean assembly to get all blade heights equal. As with mostcutting tools, reamers do not always handle very fine cuts well.
The guy in the film in the second part was dealing with long small dia solid bearings probably of standard size and his audience would have often had access to full workshop eqpt so mention of reamer option would have been appropriate.
A fixed reamer provides only one size and normally only readily available in set intervals; often a crank finished or worn below the original exact size. With all reamers alignment is tricky and easy to introduce chatter marks, esp with the adj type which require patient clean assembly to get all blade heights equal. As with mostcutting tools, reamers do not always handle very fine cuts well.
The guy in the film in the second part was dealing with long small dia solid bearings probably of standard size and his audience would have often had access to full workshop eqpt so mention of reamer option would have been appropriate.