Extension Drilling System

R22 (7/8") / R25 (1") / R28 (1-1/8") / R32 (1-1/4") /
R38 (1-1/2") / T38 (1-1/2") / T45 (1-3/4") / T51 (2")

DESIGN	DIAMETER -D-	CARBIDE INSERT
	35 mm - 51 mm	HEM / BAL
	45 mm - 64 mm	HEM / BAL
	43 mm - 51 mm	HEM / BAL
	45 mm - 51 mm	HEM / BAL
	45 mm - 51 mm	HEM / BAL
	64 mm - 127 mm	HEM / BAL
	70 mm - 76 mm	HEM / BAL
	64 mm - 89 mm	HEM / BAL
	76 mm - 127 mm	HEM / BAL
	89 mm - 127 mm	HEM / BAL
	64 mm - 89 mm	HEM / BAL
	64 mm - 76 mm	HEM / BAL
	102 mm - 203 mm	HEM

DESIGN	DIAMETER -D-	CARBIDE INSERT
	48 mm	HEM / BAL
	51 mm -57 mm	HEM / BAL
	64 mm - 127 mm	HEM / BAL
	76 mm - 89 mm	HEM / BAL
	76 mm - 127 mm	HEM / BAL

DESIGN	DIAMETER -D-	CARBIDE INSERT
	35 mm - 76 mm	STD / HD
	64 mm - 115 mm	STD / HD

DESIGN	ROD DIAMETER -D-	THREAD	LENGTH -L-
	32 mm	R32	915 mm (3') - 4265 mm (14')
	39 mm	R38 / T38	1220 mm (4') - 4265 mm (14')
	46 mm	T45	915 mm (3') - 4265 mm (14')
	52 mm	T51	3050 mm (10') - 4265 mm (14')
	52 mm	T51	3050 mm (10') - 4265 mm (14')

DESIGN	ROD DIAMETER -D-	THREAD	LENGTH -L-
	32 mm	R32	1220 mm (4') - 3660 mm (12')
	39 mm	R38 / T38	1220 mm (4') - 3660 mm (12')
	46 mm	T45	1830 mm (6') - 4270 mm (14')
	52 mm	T51	1830 mm (6') - 4270 mm (14')
	52 mm	T51	1830 mm (6') - 4270 mm (14')

DESIGN	HEX DIAMETER -D-	THREAD	LENGTH -L-
	22 mm	R22 / R25	610 mm (2') - 1830 mm (6')
	25 mm	R22 / R25	610 mm (2') - 3660 mm (12')
	28 mm	R28	610 mm (2') - 3660 mm (12')
	32 mm	T38 / R38 /R32	915 mm (3') - 3660 mm (12')
	32 mm	T38 / R38 /R32	915 mm (3') - 3660 mm (12')

R22 (7/8") / R25 (1") / R28 (1-1/8") / R32 (1-1/4") /
R38 (1-1/2") / T38 (1-1/2") / T45 (1-3/4") / T51 (2")

DESIGN	THREAD	DIAMETER -D-	LENGTH -L-
	R22	40 mm	140 mm
	R25	40 mm	140 mm
	R28	40 mm	150 mm
	R32	44 mm	150 mm
	R38	55 mm	170 mm
	T38	55 mm	190 mm
	T45	63 mm / 66 mm	210 mm
	T51	72 mm / 76 mm	225 mm

Rockmore International manufactures shank adapters
to fit drills/hammers for all extension drilling and
benching operations.Shank adapters for the most
common top hammers in the industry are listed below:

• Atlas Copco
• Boart
• Furukawa
• Gardner Denver
• Ingersoll-Rand
• Joy
• Montabert
• Tamrock
• And more