Dormer - Catalogue Français

Technical Section - Reaming
Applications
The results obtained in reaming are to
a great extent dependent upon the
condition of the drilled hole. If deep
scores or form deviations are inherent
in the hole, reaming is probably not
going to rectify these inaccuracies or
produce a finish within tolerance
requirements. A reamer can also be
mounted in a floating holder with
enough clearance to permit the reamer
to move freely along the existing hole.
Table of Speeds and Feeds
Suggested Stock Removal
Material ≥
Core-Drilled Hole Diameter (inches)
5/32 > 5/32 – 3/8 > 3/8 – 5/8 > 5/8 – 1 > 1 – 1-1/2 > 1-1/2 – 2-1/2
Steel*
Hard cast-iron
.004 .004 – .008 .006 – .010 .008 – .014 .010 – .018 .016 – .025
Soft cast-iron
Light alloys*
Copper, soft
.005 .005 – .012 .008 – .016 .010 – .020 .016 – .024 .024 – .031
Copper, alloys
Plastics
(Duro plastics)
.007 .007 – .012 .010 – .016 .013 – .020 .016 – .024 .020 – .031
* For soft materials and quick spiral machine reamers add 50% of allowance.
Type of Material Speed Range (sfm) Type of Feed
HSS
Carbide
Magnesium 200 – 400 500 – 1000 M-H
Aluminum 150 – 300 500 – 1000 M-H
Brass and Bronze – Free Mach. 125 – 200 250 – 400 M
– Tough 75 – 125 150 – 250 M
Copper and Hard Bronze 50 – 75 100 – 150 L
Cast Iron – Soft (Ferritic) 50 – 100 150 – 250 H
– Medium (Pearlitic) 25 – 50 75 – 150 L-M
– Hard (Mart. or Acicular) 15 – 25 50 – 75 L
Steel – Under 200 BHN 55 – 80 200 – 300 M-H
– 200 - 300 BHN 30 – 55 125 – 200 M
– 300 - 400 BHN 20 – 30 50 – 125 L
– 400 - 500 BHN 10 – 20 35 – 50 L
– 500 - BHN Plus — 15 – 35 L
Stainless – Free Mach. and 400 Ann. 40 – 60 150 – 250 M
– 300 Series 20 – 30 80 – 120 M
– P.H. and H.T. 400 series 15 – 25 60 – 100 L-M
High Temp Alloy – Nickel Base 10 – 20 40 – 70 L
– Cobalt Base 10 – 15 30 – 45 L
Titanium – Pure 35 – 50 50 – 100 M
– Alloys 10 – 20 35 – 50 L-M
Diameter
Range
Feed (ipr) for Diameter Range
Light (L) Medium (M) Heavy (H)
≥ 1/16” .0002” – .001” .0005” – .002” .001” – .003”
> 1/16” – 1/8” .001” – .002” .002” – .004” .003” – .006”
> 1/8” – 1/4” .002” – .004” .004” – .006” .006” – .010”
> 1/4” – 1/2” .004” – .006” .006” – .010” .010” – .015”
> 1/2” – 1” .006” – .010” .010” – .020” .015” – .030”
> 1” .010” – .020” .020” – .040” .030” – .050”
527