Reply To: what does this mean on a drawing

[S.D.L.Participant @s-d-l]

Posted by mgj on 16/11/2011 10:20:54:

Also you will find that reamers and the like are classed as Hx as well. The standard I think is an H5 IRRC, but you can get what you wan’t – if you want to pay for it.

 

I believe that Dormer and presto are normally H7 inline with the Din standard.

 

This page also tells you the tolerance on the reamer.

 

http://www.presto-tools.co.uk/files/reamers-pages.pdf

 

and here-for Dormer

http://www.dormertools.com/sandvik/2531/internet/s003592.nsf/Alldocs/Product*2DMachiningSolutions*2DPDF*2ATH*2DPDFen/$file/3Reaming.pdf

 

Steve Larner