Kelly Size

Length of Drive Section
m

Length Overall
m

Drive Section

Upper Box Connection

Lower Pin Connection

Inside
Diameterd

Standard
LD

Optional
LD

Standard
L

Optional
L

Across Flats
DFL

Across
Corners
EC

Across
Corners
DCC

Radius
RC

Radius
RCC

Min. Wall ECC.Boret

size and style LH

Outside

Diameter

Bevel Diameter

and Style

Outside
Dia.
DLR

Length
LL

Bevel Diameter

Standard

Optional

Standard
DU

Optional
DU

LU

DF

DF

63.5

(2 1/2)

11280

12190

63.5

83.3

82.55

7.9

41.3

11.43

(6 5/8)

REG

(4 1/2)

REG

196.9

146.1

406.4

186.1

82.9

31.8

76.2

(3)

11280

12190

76.2

100.0

98.43

9.5

49.2

11.43

(6 5/8)

REG

(4 1/2)

REG

196.9

146.1

406.4

186.1

134.5

NC31
(27/8

IF)

104.8

508

100.4

44.5

88.9

(3 1/2)

11280

12190

88.9

115.1

112.70

12.7

56.4

11.43

(6 5/8)

REG

(4 1/2)

REG

196.9

146.1

406.4

186.1

134.5

NC38
(31/2

IF)

120.7

508

116.3

57.2

108.0

(4 1/4)

11280

15540

12190

16460

108.0

141.3

139.70

12.7

69.9

12.07

(6 5/8)

REG

(4 1/2)

REG

196.9

146.1

406.4

186.1

134.5

NC46
(4IF)

158.8

508

145.3

71.4

108.0

(4 1/4)

11280

15540

12190

16460

108.0

141.3

139.70

12.7

69.9

12.07

(6 5/8)

REG

(4 1/2)

REG

196.9

146.1

406.4

186.1

134.5

NC50
(41/2

IF)

161.9

508

154.0

71.4

133.4

(5 1/4)

11280

15540

12190

16460

133.4

175.4

171.45

15.9

85.7

15.88

(6 5/8)

REG

196.9

406.4

186.1

5 1/2

FH

177.8

508

170.7

82.6

133.4

(5 1/4)

11280

15540

12190

16460

133.4

175.4

171.45

15.9

85.7

15.88

(6 5/8)

REG

196.9

406.4

186.1

NC56

177.8

508

171.1

82.6