China Wholesale Retrac Rock Drill Bits Factory – Bench and long-hole drilling T60 (2 3/8″) – LYNE

Extension pole, extension rod, extension handle
Threaded Connection: R32, R38, T38, T45, T51, and so on.
Diameter: OD32, OD38, HEX32, HEX35, And so on.
Length: 800-6000MM.
Package: Wood case or wrapped with plastic knitting and then packed into bundles or as per your requests.

Bench and long-hole drilling T60 (2 3/8″)

Bits

Diameter

Buttons,mm

Angle

Flushing hole

Weight approx kg

Part No.

mm

in

Front No Size

Gauge No Size

Type

Front

Gauge

Button bit

92

3 5/8”

6×12

8×14

35º

4

-

5.2

1433-92T60-612/814-45-41

96

3 3/4”

6×12

8×14

35º

4

-

5.3

1433-96T60-612/814-45-41

102

4”

6×13

8×13

35º

4

-

6.4

1433-102T60-613/813-45-41

115

4 1/2”

6×13

8×14

35º

4

-

7.3

1433-115T60-613/814-45-41

115

4 1/2”

6×13

8×14

35º

4

-

7.3

1433-115T60-613/814-45-51

127

5”

7×14

8×16

35º

4

-

8.9

1433-127T60-714/816-45-41

140

5 1/2”

7×16

8×16

35º

4

-

12.1

1433-140T60-716/816-45-41

152

6”

7×16

8×16

35º

4

-

13.6

1433-152T60-716/816-45-41

Button bit, Retrac
	92	3 5/8”	6×12	8×14		35º	4	-	6.1	1533-92T60-612/814-45-41
	96	3 3/4”	6×12	8×14		35º	4	-	6.2	1533-96T60-612/814-45-41
	102	4”	6×13	8×13		35º	4	-	8.0	1533-102T60-613/813-45-41
	115	4 1/2”	6×13	8×14		35º	4	-	9.4	1533-115T60-613/814-45-41
	115	4 1/2”	6×13	8×14		35º	4	-	9.4	1533-115T60-613/814-45-51
	127	5”	7×14	8×16		35º	4	-	13.1	1533-127T60-714/816-45-41
	140	5 1/2”	7×16	8×16		35º	4	-	16.1	1533-140T60-716/816-45-41

Rods	Length		Diameter		Weight approx kg	Part No.
	mm	ft/in	mm	inch
MF－rod, T60－Round60－T60
	3660	12＇	60	2 3/8”	70.0	24R60-T60-3660-23
	4270	14＇	60	2 3/8”	82.0	24R60-T60-4270-23
	6100	20＇	60	2 3/8”	116.0	24R60-T60-6100-23

MF－rod, T60－Round60－T60
	4270	14＇	60	2 3/8”	86.6	24R60-T60/85-4270-23

Coupling sleeve
	T60	315	1 3/8”	85	3 11/32”	7.9	31-T60-85-315-23
	T60	315	1 3/8”	89	3 1/2”	8.2	31-T60-89-315-23

Extension rod, other names are Extension drill steel, Extension drill rod, and Extension steel, M/F rod ( Speedrod ) , Produce Hexagonal and round cross sections, Hexagon rods are more rigid, heavier and transfer energy more efficiently, while increasing flushing. Round rods are generally lighter than hexagonal rods and are normally used in extension drilling applications. With the longer steel tending to be larger in diameter, conventional extension steel is characterized by a duplicate thread on each end of the steel.

M/F drill steel is an alternative to couplings sleeves to include the female part of the threaded connection as an integral part of the drill steel. M/F drill steel provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings.

For Extension Rod and M/F steel process, the below two different types of heat treatment are used to strengthen high speed and powerful percussive drill string components to maximize their performance and reliability.

Carburization is a process used to harden the entire rod surface both internally and externally to strengthen and extend the life of the rod.
High Frequency Induction is a process where only the thread ends of the rod are hardened to lengthen thread life.