E J Company

Deep Hole Drilling Products

Drilling Data

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Drilling Data (PDF 110 KB)

DRILLING  DATA  FOR  E  J  COMPANY  DTS (424.6)  &  STS (420.6)  DRILLS
ISO Material Description HB Condition CMC# Specific Cutting Force
kc
lbs/sq in
Cutting Speed
ft / min
Drill Diameter (inches)
.312-.495 .496-.614 .615-.787 .788-1.220 1.221-1.692 1.693-2.559
Feed in. / rev.
P Unalloyed Steel 90-200
125-225
150-225
180-225
Non-hardened 0.05-0.25% C
Non-hardened 0.25-0.55% C
Non-hardened 0.55-0.80% C
High Carbon & Carbon Tool Steel
1.1
1.2
1.3
1.4
290,000
304,500
316,100
.
230 - 395

230 - 295
 
.003-.006
 
.003-.006
 
.004-.007
 
.004-.007
 
.006-.008
 
.006-.008
 
.006-.008
 
.007-.010
 
.006-.010
 
.008-.012
 
.007-.011
 
.009-.013
 
Low Alloy Steel 150-260
220-400
Non-hardened
Hardened and Tempered
2.1
2.2
304,500
402,400
230 - 330
180 - 330
.003-.006 .004-.007 .006-.008 .007-.010 .008-.012 .009-.013
High Alloy Steel 150-250
150-250
250-350
250-400
Annealed
Annealed HSS
Hardened Tool Steel
Hardened Steel, Others
3.11
3.13
3.21
3.22
362,500

543,700
 
230 -330

180 - 330
 
.003-.006 .004-.007 .006-.008 .007-.010 .008-.012 .009-.013
Steel Castings 90-225
150-250
 
Unalloyed
Low Alloyed
(alloying elements < 5%)
6.1
6.2
 
261,000
394,500
 
160 - 330 .003-.006 .003-.007 .005-.007 .006-.009 .008-.011 .010-.013
M Stainless Steel 150-270
150-275
Ferritic, Martensitic 13-25% Cr
Austenitic Ni >8%, 18-25% Cr
5.11
5.21
333,500
355,200
130-280
180-280
.003-.006
.003-.006
.006-.008
.006-.008
.006-.008
.006-.008
.007-.010
.007-.010
.009-.012
.009-.012
.009-.014
.010-.014
Stainless Steel - Cast 150-180
 
Austenitic
 
15.21 333,500 150-280 .003-.006 .004-.007 .006-.008 .007-.010 .009-.012 .010-.014
Heat Resistant Alloys 180-300
220-300
220-300
Fe-based
Ni-based
Co-based
20.1
20.2
20.3
435,000
481,400
507,500
30-165 .003-.005 .004-.006 .004-.007 .006-.008 .007-.010 .008-.012
  300-450
 
(Wrought or cast) Alpha and
Alpha-beta Alloys
23.1 221,800 100-165 .003-.005 .004-.006 .005-.006 .006-.009 .007-.010 .008-.012
K Extra Hard Steel 250 Manganese 12-14% Mn 6.33 522,000 100-230 .003-.006 .004-.007 .006-.008 .007-.010 .009-.012 .010-.012
Malleable Cast Iron 110-145
150-270
Ferritic (short chipping)
Pearlitic (long chipping)
7.1
7.2
137,700
159,500
260-330 .003-.005 .004-.006 .006-.007 .007-.010 .008-.012 .009-.013
Grey Cast Iron 150-220
200-330
Low Tensile Strength
High Tensile Strength
8.1
8.2
159,500
203,000
200-330 .003-.006 .003-.007 .005-.007 .006-.009 .008-.011 .009-.013
Nodular Cast Iron 125-230
200-300
Ferritic
Pearlitic
9.1
9.2
150,200
253,700
165-330 .003-.006 .003-.007 .005-.007 .006-.009 .008-.011 .009-.013
Aliminum Alloys 30-80
75-150
40-100
70-125
Wrought and cold drawn
Wrought solution treated & aged
Cast
Cast solution treated & aged
30.11
30.12
30.21
30.22
72,500
116,000
108,700
130,500
210-430 .003-.006 .004-.008 .004-.008 .006-.010 .007-.012 .008-.018
Copper and Copper Alloys 50-160
-130
 
Free Cutting Alloys (Pb ≥1%)
Brass & Leaded Bronzes (Pb ≥1%)
33.1
33.2
 
101,500 210-430 .003-.006 .004-.008 .004-.008 .006-.010 .007-.012 .008-.018