alro.com
DRILL ROD
Size Chart.............................................................16-2 thru 16-8
Drill Rod Specifications........................................................ 16-9
Any sizes not listed in this section are available upon request.
Alro's drill rod inventory is available in many grades and hundreds of
standard diameters.
Visit the Alro Web Site
alro.com
alro.com
alro.com
16-1
alro.com
DRILL ROD
(3 FT. LENGTHS)
*AVAILABLE IN 12 FOOT LENGTHS
H-13
RC
Size in Deci
W-1* O-1*S-7 A-2*D-2 M-2 42/46
inches mal
69
.0290


68
.0300


67
.0310


1/32
.0312


66
.0320


65
.0330


64
.0350


63
.0360


62
.0370


61
.0380


60
.0390


59
.0400


58
.0410


57
.0420


56
.0450


3/64
.0468


55.0500 

54
.0550 

53.0580 

1/16.0625 

52
.0630 

51
.0660 

50
.0690 

49
.0720 

48.0750 

47.0770 

5/64
.0781 

46
.0790 

45.0810 

44.0850 

43
.0880 

42
.0920 









•Letter and number designations refer to non-standard fractional sizes.
•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
16-2
alro.com
DRILL ROD (3 FT. LENGTHS)
*AVAILABLE IN 12 FOOT LENGTHS
H-13
RC
Size in Deci
W-1*O-1*S-7A-2*D-2 M-2 42/46
inches
mal
3/32
.0937


41
.0950


40
.0970


39
.0990


38
.1010


37
.1030


36
.1060


35
.1080


7/64
.1093


34
.1100


33
.1120


32
.1150


31
.1200


1/8
.1250


30
.1270


29
.1340


28
.1390


9/64
.1406


27
.1430


26
.1460


25
.1480


24
.1510


23
.1530


22
.1550


5/32
.1562


21
.1570


20
.1610


19
.1640


18
.1680


11/64
.1718


17
.1720


16
.1750




























•Letter and number designations refer to non-standard fractional sizes.
•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
16-3
alro.com
DRILL ROD (3 FT. LENGTHS)
*AVAILABLE IN 12 FOOT LENGTHS
H-13
RC
Size in Deci
W-1*O-1* S-7 A-2* D-2 M-2 42/46
inches
mal
15
.1780 

14
.1800 

13
.1820 

12
.1850 

3/16
.1874


11
.1880 

10
.1910 

9
.1930 

8
.1970 

7
.1990 

6
.2010 

13/64
.2031

5
.2040 

4
.2070 

3
.2120 

7/32
.2187

2
.2190 

1
.2270 

A
.2340 

15/64
.2343

B
.2380 

C
.2420 

D
.2460 

1/4
.2500 

E
.2500 

F
.2570 

G
.2610 

17/64
.2656

H
.2660 

I
.2720 

J
.2770 

K
.2810 


































•Letter and number designations refer to non-standard fractional sizes.
•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
16-4
alro.com
DRILL ROD (3 FT. LENGTHS)
*AVAILABLE IN 12 FOOT LENGTHS
H-13
Size in DeciRC
inches mal
W-1*O-1* S-7 A-2*D-2 M-2 42/46
9/32
.2812
L
.2900 

M
.2950 

19/64
.2968

N
.3020 

5/16
.3125

O
.3160 

P
.3230 

21/64
.3281

Q
.3320 

R
.3390 

11/32
.3437

S
.3480 

T
.3580 

23/64
.3593

U
.3680 

3/8
.3750 

V
.3770 

W
.3860 

25/64
.3906

X
.3970 

Y
.4040 

13/32
.4062

Z
.4130 

27/64
.4218

7/16
.4375

29/64
.4531
15/32


























































.4687






31/64
.4843






1/2
.5000 






33/64
.5156


17/32
.5312















•Letter and number designations refer to non-standard fractional sizes.
•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
16-5
alro.com
DRILL ROD (3 FT. LENGTHS)
*AVAILABLE IN 12 FOOT LENGTHS
H-13
Size in Deci
RC
inches
mal
W-1*O-1* S-7 A-2* D-2 M-2 42/46
35/64
.5468


9/16
.5625


37/64
.5781


19/32
.5937


39/64
.6093


5/8
.6250


41/64
.6406


21/32
.6562


43/64
.6718


11/16
.6875


45/64
.7031


23/32
.7187


47/64
.7343


3/4
.7500


49/64
.7656


25/32
.7812


51/64
.7968


13/16
.8125


53/64
.8281


27/32
.8437


55/64
.8593


7/8
.8750


57/64
.8906


29/32
.9062


59/64
.9281


15/16
.9375


61/64
.9531


31/32
.9687


63/64
.9843


1
1.0000 

1-1/64
1.0156


1-1/32
1.0312























































•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
16-6
alro.com
DRILL ROD (3 FT. LENGTHS)
*AVAILABLE
IN 12 FOOT LENGTHS
H-13
Size in Deci
RC
inches mal
W-1*O-1*S-7 A-2*D-2 M-242/46
1-3/641.0468 

1-1/16
1.0625

 
1-5/64
1.0781


1-3/32
1.0937


1-7/64
1.1093


1-1/8
1.1250


1-9/64
1.1406


1-5/32
1.1562


1-11/64
1.1718







1-3/161.1875 

1-13/641.2031 

1-7/32
1.2187


1-15/64
1.2343


1-1/4
1.2500


1-17/64
1.2656


1-9/32
1.2812


1-19/64
1.2968


1-5/16
1.3125


1-21/64
1.3281


1-11/32
1.3437


1-23/64
1.3593


1-3/8
1.3750


1-25/64
1.3906


1-13/32
1.4062


1-27/64
1.4218


1-7/16
1.4375


1-29/64
1.4531


1-15/32
1.4687


1-31/64
1.4843


1-1/2
1.5000


1-9/16
1.5625


1-5/8
1.6250















•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
16-7
alro.com
DRILL ROD (3 FT. LENGTHS)
*AVAILABLE IN 12 FOOT LENGTHS
H-13
Size in Deci
RC
inches mal W-1* O-1* S-7 A-2*D-2 M-2 42/46
1-11/161.6875 

1-3/41.7500


1-13/16
1.8125


1-7/81.8750


1-15/161.9375 

2

2.0000 


•Please refer to page 16-9 for drill rod specifications and tolerances.
•Sizes not listed are available upon request.
Alro drill rod is produced to close standard tolerances, closely-controlled
chemical compositions and exceptional surface finish and quality.
16-8
alro.com
DRILL ROD SPECIFICATIONS
Fine Standard Tolerances
DIMENSIONAL TOLERANCES
Standard*
Concentricity
Tolerance
Max T.I.R.
(section)
Round DrilI Rod
3.000" to .500"
.499" thru .125" dia.
.124" and smaller dia.
Flat and Square Drill Rod
1.000" thru .750" (largest dim.)
.749" thru .250" (largest dim.)
.249" and smaller
±.001"
±.0005"
±.0003"
Standard
Tolerance
(length)
.005"
.005"
.005"
+1/8", -.0
+1/8", -.0
+1/8", -.0
±.0015"
±.001"
±.0005"
+1/8", -.0
+1/8", -.0
+1/8", -.0
*CIoser tolerances than standard can be produced upon inquiry.
Closely-controlled Chemical Compositions
Uniform machining properties and consistent response to heat treatment are obtained
through careful control of chemical analysis.
CHEMICAL COMPOSITIONS (%)
GradeW1 O1 A2 S7 D2 H13M2
Carbon
.95-1.05.85-1.00.95-1.05 .45-.551.40-1.60 .32-.45 .78-.88
Manganese
.30-.40
1.00-1.40 1.00 MAX
.20-.80
.60 MAX
.20-.50
.15-.85
Silicon
.10-.25
.50 MAX .50 MAX
.20-1.00
.60 MAX
.80-1.20
.20-.45
Phosphorus .025 MAX
Sulphur
.025 MAX
Chromium
.15 MAX
.40-.60
Vanadium
.10 MAX
.30 MAX
Tungsten
.15 MAX
.40-.60
Molybdenum .10 MAX
4.75-5.50 3.00-3.50 11.00-13.00 4.75-5.50 3.75-4.50
.15-.50
.30 MAX 1.10 MAX
.90-1.40 1.30-1.80
.70-1.20
Cobalt
1.00 MAX
Nickel
.30 MAX
.30 MAX .30 MAX
.80-1.20 1.75-2.20
1.10-1.75 4.50-5.50
.30 MAX .30 MAX
Visit the Alro Web Site
alro.com
alro.com
alro.com
16-9
alro.com
Visit the Alro Web Site
alro.com
16-10