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USER GUIDE
SOLID CARBIDE DRILLS

Coolant Pressure and Volume Recommendations

Force and Power Characteristics
Feed Force
(lbf) 870
Coolant Pressure [PSI] 435 3.17 Coolant Volume [l/GPM]
675 725 5.28
560 580 4.23
450
335 290 2.11
225 145 1.06
0
110 .12 .20 .40 .60 .80 1.0
Tool Diameter (inch)
0
.08 .16 .25 .31 .40 .50 .55 .63 .70 Required Coolant Pressure Required Coolant Volume
Drill Diameter (inch) Optimum pressure Optimum volume
f=.012 ipr Good pressure Good volume
f=.010 ipr Minimum pressure Minimum pressure
f=.008 ipr Required coolant pressure and volume for SCD
drills with internal coolant spiral nozzles.
Net Power Consumption
(HP) Stability
The stability of the application volume is important in order
4.00 to obtain the very best tool life and hole accuracy. Check
the condition of the machine spindle, fixture and fixturing
3.35
of the component to secure maximum stability and rigidity.
2.70
Unstable conditions can cause tool breakage.
2.00
Stationary Drill Rotating Drill
1.35
Max .001”
.67
0
.08 .16 .25 .31 .40 .50 .55 .63 .70
Drill Diameter (inch)
f=.012 ipr Max .001”
f=.010 ipr
f=.008 ipr
Correct Direction Incorrect Direction
Material: SAE 4340
Speed: 300 sfm
Values may change for different materials and
drilling conditions.

External Coolant External Coolant
Tool Life
Drills should not be used with flank wear
exceeding .008-.012”.

.008-.012”

226 ISCAR