SIZE

TYPE

PIN SIZE

WEIGHT(ibs.)

4 3/4

IADC517,547

2 7/8

24.2

4 7/8

IADC547

2 7/8

26.4

5 1/2

IADC547

3 1/2

29.7

5 5/8

IADC547

3 1/2

30.2

5 2/3

IADC546

3 1/2

30.8

6

IADC417,447

3 1/2

35.2

6 1/8

IADC547

3 1/2

37.4

6 1/4

IADC517,537

3 1/2

37.4

6 1/2

IADC517,547,817

3 1/2

44

6 3/4

IADC517,537

3 1/2

50.6

7 1/2

IADC517,545,547,625,627,835

4 1/2

66

7 7/8

IADC417,517,527,537,817

4 1/2

72.6

8 1/2

IADC417,435,437,517,535,537,547,625,627,635,745,835,837

4 1/2

81.4

8 3/4

IADC437

4 1/2

88

9 5/8

IADC535

6 5/8

121

9 7/8

IADC517,537,737

6 5/8

127.6

10 5/8

IADC437,535,537,545,547,627,745

6 5/8

167.2

11

IADC617

6 5/8

173.8

11 5/8

IADC535,545,625

6 5/8

198

12 1/4

IADC437,517,535,537,617

6 5/8

204

15 1/2

IADC545,615

7 5/8

440

17 1/2

IADC535,545

7 5/8

594

IADC code

WOB

(KN/mm)

RPM

(r/min)

Applicable Formations

114/115

0.25~0.70

200~80

Very soft with low compressive strength strength and high drillability,

such as soft shale,clay and salt bed,etc

116/117

0.35~0.90

150~80

Hardfaced tooth surface and gage, high cutter exposure and the gage 

fitted with compacts 

126/127

 0.35~1.0

150~70

Hardfaced tooth surface and gage, high cutter exposure and the gage

fitted with compacts

136/137

0.35~1.05

120~60

Hardfaced gage and all tooth surfaces and the gage fitted with compacts 

for enhanced protection

216/217

  0.5~1.20

100~50

Hardfaced gage and all tooth surfaces and the gage fitted with compacts 

for enhanced protection

Note: The upper limits of WOB and RPM in above table should not be used simultaneously.