Rock bits

Manufactured with superior quality steel, advanced technologies, designed for use with compressed air or fluid circulation systems.
Regular and Jet circulation available.
Cutting structures allow optimum penetration rates and long runs even in the most difficult and abrasive formations.
Weight on the bit is distributed through a five part anti-friction bearing matched and ground with precision to tolerances of ± 0,0002″.
Critical areas on the external portion of the bit are protected with tunsten carbide alloy hardfacing.

Soft
Medium – Soft
Medium – Hard
Hard formations

DIAMETER		CONN.	WEIGHT	TOOTH			INSERT
in.	mm.	PIN SIZE	KG	T3	T2	T1H	SE54	SE56	SE58
2 7/8 – 2 15/16	73-75	N-ROD (4 thd)	1.8	□	□	□	□	□	□
3 – 3 1/2	76-89	N-ROD (4 thd)	2	□	□	□	□	□	□
3 3/4 – 3 7/8	95-98	2 3/8 API REG.	4	□	□	□	□	□	□
4 – 4 1/8	101-105	2 3/8 API REG.	5	□	□	□	□	□	□
4 1/4 – 4 1/2	108-114	2 3/8 API REG.	5	□	□	□	□	□	□
4 3/4 – 5″	120-127	2 7/8 API REG.	5.5	□	□	□	□	□	□
5 1/8 – 5 1/2	130-140	2 7/8 API REG.	7	□	□	□	□	□	□
5 7/8	149	3 1/2 API REG.	11.5	■	■	■	■	■	■
6 – 6 1/8	152-155	3 1/2 API REG.	12.6	■	■	■	■	■	■
6 1/4 – 6 1/2	159-165	3 1/2 API REG.	18	■	■	■	■	■	■
6 3/4	171	3 1/2 API REG.	18	■	■	■	■	■	■
7 7/8	200	4 1/2 API REG.	34	■	■	■	■	■	■
8 1/2	216	4 1/2 API REG.	38	■	■	■	■	■	■

When drilling hard and abrasive formations with tooth type rock bits, an excessive wear of the teeth may occur. It is necessary in such cases to use tungsten carbide insert rock bits. A specified in the next table of drilling parameters, more weight must be given when drilling with T.C.I. rock bits in order to obtain a major compression effect on hard rock being drilled.

ROCK BIT TYPE	FORMATION TO DRILL	WEIGHT PER INCH (KG)		SPEED
		MIN	MAX	MIN	MAX
TOOTH TYPE ROCK BIT	SOFT – MEDIUM	450	1300	60	110
	MEDIUM HARD	450	1800	50	100
	DURE – MOLTO DURE	900	2200	40	80

INSERT ROCK BIT	SOFT – MEDIUM	450	1800	45	80
	MEDIUM HARD	1200	2800	40	80
	HARD AND ABRASIVE	1800	3100	30	60

Large Diameters New & Retiped,Rerun

For oil and water well drilling.
New and reconditioned of major U.S.A. brands: HUGHES, SMITH, REED, SECURITY.

milled steel tooth type
tungsten carbide insert type

Available with sealed or regular bearing, with regular or jet circulation.

DIAMETER inch	DIAMETER mm.	CONNECTION	WEIGHT
DIAMETER inch	DIAMETER mm.	CONNECTION	LBS	KG
5 7/8″	149.2	3 1/2″ API REG. PIN	29	13
6″	152.4	3 1/2″ API REG. PIN	32	14
6 1/8″	155.6	3 1/2″ API REG. PIN	33	14.5
6 1/4″	158.8	3 1/2″ API REG. PIN	40	18
6 1/2″	165.1	3 1/2″ API REG. PIN	46	21
6 3/4″	171.5	3 1/2″ API REG. PIN	49	22
7 7/8″	200.0	4 1/2″ API REG. PIN	76	34
8 1/2″	216.0	4 1/2″ API REG. PIN	90	41
8 3/4″	222.3	4 1/2″ API REG. PIN	92	42
9 1/2″ – 9 7/8″	241.3 – 250.8	6 5/8″ API REG. PIN	141	65
10 5/8″	270.0	6 5/8″ API REG. PIN	170	77
11″	279.4	6 5/8″ API REG. PIN	175	80
12 1/4″	311.2	6 5/8″ API REG. PIN	220	100
13 1/2″ – 13 3/4″	342.9 – 349.3	6 5/8″ API REG. PIN	237	108
14 3/4″	374.7	6 5/8″ o 7 5/8″ API REG. PIN	305	138
16″	406.4	6 5/8″ o 7 5/8″ API REG. PIN	415	187
17 1/2″	444.5	7 5/8″ API REG. PIN	580	262
22″	558.8	7 5/8″ API REG. PIN	766	347
23″	584.2	7 5/8″ API REG. PIN	820	372
26″	660.4	7 5/8″ API REG. PIN	1335	605
28″	711.2	8 5/8″ API REG. PIN	1600	720

Available with sealed or regular bearing , with regulator or jet circulation.

Classification – code IADC

Tooth Type
Soft formations Bits that feature long, widely spaced teeth, to drill soft formation such as shales, soft sandstone, clay and all unconsolidated formations. IADC CODES 111 – 126 – 134	Tricono a Denti IADC 111
Medium formations With medium length teeth, closer spaces, to drill unconsolidated limestones, medium sandstones, clay, marls IADC CODES 211 – 224 – 234	Tricono a Denti IADC 211
Medium Hard – Hard formations With short, closely spaced teeth with tungsten carbide hardfacing, for hard and abrasive formations such as sandstones, dolomite, hard limestone and granite. IADC CODES 311 – 314 – 321	Tricono a Denti IADC 311

Insert Type
Soft – Medium Soft formations Features large chisel-shaped tungsten carbide inserts to provide the highest penetration rates in the softest formations such as shales, clays, limestone and sands. IADC CODES 437 – 517 – 527	Tricono ad Inserti IADC 435
Medium Hard – Hard formations Effective in a variety of formations with higher compressive strength such as hard limestone, sandstone, dolomite and other formations with high abrasive quality, hard streaks and broken formations. IADC CODES 617 – 627 – 637	Tricono ad Inserti IADC 622
Hard and abrasive formations With hemispherical tungsten carbide inserts. To optimize penetration rate in hard and abrasive formations such as granites, basalts, quartzite and chert. Drilling weight of 3 ± 4 tons per inch of diameter should be applied. IADC CODES 732 – 737 – 837	Tricono ad Inserti IADC 733

Large Diameters New & Retiped,Rerun

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