The reamer I have is simply marked 1". Industrial cutting tools 255FL x 380 0/A. - ie it is 255mm long on the fluted cutters and 380mm overall. If it is H7 then the tolerance is -0.000 + 0.021 mm or just about 1 thou oversize if I've got that right (not a given). This sounds a bit tight. Probably the best thing is just to go try it and see what the results are....
many thanks for your help...
Last edited by SCX358G; 13/03/25 10:27 PM.