Above are illustrated the seven basic cutter profiles and cross sectional views of the profiles they will produce
Material to be cut
Tool Angle
Recommended cutting speeds for high speed steel single lip
cutter roughing cut finish cut
α
β
γ
S.f.p.m m/min s.f.p.m m/min
25
°
15
°
5
°
195 60 260 80
Cast steel
Malleable cast iron
Machinery steel
230 70 295 90
57,000 to 85,000
(40to60kg/mm)
195 60 230 70
85,000 to115,000
(80kg/mm)
130 40 165 50
Over 115,000
(80kg/mm)
195 60 260 80
Tool steel soft
grade hard grade
165 50 230 70
2
Cutter with end relief. Cutter with pointed end. Rounded-off cutter
Tool Angles
As is the case with all metal cutting tools, single-lip milling cutters require the proper amount of cutting edge relief or back rake
angle for maximum stock removal and high surface finish. As regards single-lip cutters, three different tools angles will have to be
taken care of, these angles being used in all kinds of cutters.
Angle
β
applies to end relieved cutters only. Cutters having an angle of less than 20
o
should be relief ground at between 25
o
and
30
o
.
Cutter Speeds
As regards single-lip milling cutters, it is recommended to use cutting speeds three times higher than those used with standard
type milling cutters. The data tabulated on the below should be used as a guide only. As such factors as drive conditions and available
spindle speeds will also have to be taken into consideration. In end cutting edges the cutting speed will decrease forwards the cutter.
Center line. This effect is particularly noticeable in rode-off cutter. As a consequence, care should surfaces are concerned, rather than
downward.
When cutting soft aluminium, use kerosene as a coolant. When cutting celluloid, the cutter must always be in feed motion, in order to
Brass, 58/41 soft
Grade hard grade
655 200 820 250
820 250 1150 350
30
°
15
°
5
°
Brass,63/37soft
grade Hard grade
395 120 490 150
490 150 590 180
Bronze soft grade
525 260 655 220
655 200 755 230
Hard grade
Aluminum soft
Grade hard grade
35
°
655 200 985 300
820 250 1150 350
985 300 1150 350
25
°
15
°
5
°
Wood
35
°
820 250 985 300
Plastic: Trogon
45
°
25
°
20
°
688 200 820 250
Pertinaz,Fiber
655 200 985 300
Astral on, Celluloid
Plexus
655 200 1150 350
