Drifting And Tunneling R28

Extension rod, with male threads at both ends, connects with a shank adapter through a coupling sleeve. Rock drill extension rod can divide into round extension rods and hexagonal extension rods, and is widely used in bench drilling, bolt hole drilling, production drilling, long hole drilling, small hole drilling and other fields.

kendol owns a large scale extension rod factory to produce and provide high quality rock drill extension rods, such as R22 drill extension rod, R25 extension rod, R28 extension rod, R32 extension rod, R38 extension drill rod, T38 threaded extension rod, T45 extension rod, T51 rod, SR25 extension rod…

R28 (1 1/8″)

Button bit ( R28)	Dimensions (D)		Flushing hole (mm)		Buttons (mm)		Angle	Class	Part no.
	mm	inch	Front No size	Gauge No size	Front No size	Gauge No size
	38 41 43 45	1 1/2” 1 5/8” 1 11/16” 1 3/4”	2×5 2×5 2×5 2×5	1×5 1×5 1×5 1×5	5×9 5×6 5×10 5×11	2×7 2×8 2×8 2×9	30° 30° 30° 30°	H H H H	3038R2807 3041R2807 3043R2807 3045R2807
	41	1 5/8”	2×5	2×5.5	6×9	2×8	30°	S	3041R2808
	43 45	1 11/16” 1 3/4”	—— 1×5	3×5 3×5	6×9 6×10	3×8 3×8	30° 30°	M M	3043R2809 3045R2809

Reaming Tools  (R28)	Dimensions (D)		Flushing hole (mm)		Buttons (mm)		Angle	Part no.
	mm	inch	Front No size	Gauge No size	Front No size	Gauge No size
Pilot bit 6°taper	40	1 37/64”	2×5.5	2×5	4×9	2×8	30°	3040R2806K
Reaming bit 6°taper	76	3”	——	——	8×11	——	35°	3076R2808K
Dome bit	76	3”	2×7	2×9	14×11	1×11	35°	3076R2815K

Drill rod (R28)	Dimensions (L)			Dimensions (D)		Part no.
	mm	ft	inch	mm	in
Hex rod 28 with threads R28/R32	2800 3100 3700	9 10 12	2 2 2	28 28 28	1 1/8 1 1/8 1 1/8	2128R32R2828 2128R32R2831 2128R32R2837
Hex rod 32 with threads R28/R32	4310	14	2	32	1 1/4	2132R32R2843

Coupling  (R25)	Dimensions  (D)		Length(L) mm	Part no.
	mm	inch
R28-R28	37	1 29/64”	160	MX-R283716
Crossover coupling R28-R32	45	1 3/4”	171	MX-R28R324517