DTH-REC 139.7-5.6,

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Product info

Robit® Overburden Eccentric System

Designed to offer maximum reliability in overburden drilling conditions
Enables driving the casing in all downward vertical directions/formations
Helps avoid collapsing holes and lost equipment
A two-piece bit, consisting of a concentric pilot bit and a swing-out eccentric reamer
Enlarges the hole’s diameter driving the casing down into the hole
Reamer can be retractred by applying reverse rotation
Full system can be pulled out and used again
Ideal for water well and geothermal drilling, micropiling, as well as dam and port projects

	Casing OD	Casing OD	Casing Max Wall	Casing Max Wall	Casing ID	Casing ID	Pilot bit	Pilot bit	Reamed diam.	Reamed diam.	Drill pipes	Drill pipes	Hammer
Order code	mm	in.	mm	in.	mm	in.	mm	in.	mm	in.	mm	in.
DTH-REC 114.3-5	114,3	4 ½	6,0	0.236	102,3	4.027	99,5	3.917	125,0	4.921	76	3	3"
DTH-REC 168.3-6	168,3	6 ⅝	5,6	0.220	157,1	6.185	154,0	6.063	185,0	7.283	89	3½	5"
DTH-REC 193.7-6	193,7	7 ⅝	5,0	0.196	183,7	7.232	179,0	7.047	212,0	8.346	114	4½	6"
DTH-REC 219.1-6.3	219,1	8 ⅝	6,3	0.248	206,5	8.129	203,0	7.992	238,0	9.370	114	4½	6"
DTH-REC 273-6.3	273,0	10 ¾	6,3	0.248	260,4	10.251	255,0	10.039	307,0	12.086	139 / 168	5½ / 6½	8"