Proper Drill Speeds For Materials And Bit Diameter; Dake Safety Features - Dake TB-16 Owner's Manual

The proper drill speed for a given drill bit size is as on following table :
Material
Type
Drill Dia.
Inch
1/16
3/16
TB-16
& 5/16
SB-16
7/16
SB-25
1-1/8
SB-32
1-1/4
CHUCK / CHIP GUARD
FOR OPERATOR SAFETY, ALWAYS USE PROPER
POSITIONED CHUCK GUARD.
Cast Steel
s.f.m.
40
2,445
1/8 1,220
815
1/4 610
490
3/8 405
350
1/2 305
5/8 245
3/4 205
7/8 174
1 153
136
122
SAFETY FEATURES OF DAKE DRILL PRESSES
Tool Steel Cast Iron
SURFACE FEET PER MINUTE
s.f.m. s.f.m.
60 80
REVOLUTIONS PER MINUTE
3,665 4,890
1,835 2,445
1,220 1,630
915 1,220
735 980
610 815
525 700
460 610
365 490
305 405
261 348
229 306
204 272
167 244
CE CERTIFIED ELECTRONICS
Membrane covered
On / Off push
buttons
14
Mild Steel
s.f.m.
100
6,110
3,055
2,035
1,530
1,220
1,020
870
765
610
510
435
382
340
306
Low voltage, thermo protection
Emergency stop button.
Belt cover interlock
Alum. &
Copper
s.f.m.
200
12,225
6,110
4,075
3,055
2,445
2,035
1745
1,530
1,220
1,020
762
668
595
535