TCI bits
1 Soft formations(417,437,517,537)
Features large chisel-shaped inserts to provide the highest penetration rate in the softest formations such as shales, clays, limestone and sands.

2 Soft to medium formations(617,637)

to Medium FonsDesigned to drill effectively in formations such as hard limestone, dolomite, hard sands, and other formations with hard chert
3 Medium to hard formations(737)
For extremely hard formations such as chert, granite, flint, and taconite. Features short, closely-spaced inserts to ensure maximum penetration rate and wear resistance.

Steel tooth/Milled tooth bits
1\Soft formations(114-117)
These bits are designed to drill the softest formations such as soft shales,red beds, and clays, with high durability and maximum penetration rates.
2\Soft to medium formations(121,124,126,127,134,136,137)
These bits are designed to drill formations such as shales, medium soft limestone, Medium sandstone and other formations with intermittent hard streaks.
3\Medium to hard formations(213,214,215,217)
These bits are designed to drill formations such as hard sandstone, dolomite, and broken formations with hard cherty streaks

TRICONE BIT SIZE
	Inch	mm	Inch	mm
1	5 3/4	146.1	11 5/8	295.3
2	5 8/7	149.2	12	304.8
3	6	152.4	12 1/4	311.2
4	6 1/8	155.6	12 5/16	312.7
5	6 1/4	158.8	12 3/8	314.3
6	6 1/2	165.1	12 7/16	315.9
7	6 8/5	168.3	12 5/8	320.7
8	6 3/4	171.5	13 1/8	333.4
9	7 1/2	190.5	13 1/2	342.9
10	7 5/8	193.7	13 5/8	346.1
11	7 7/8	200	13 3/4	349.3
12	8 3/8	212.7	14 1/2	368.3
13	8 1/2	215.9	14 3/4	374.7
14	8 5/8	219.1	15 1/2	393.7
15	8 3/4	222.3	16	406.4
16	9 1/2	241.3	17 1/2	444.5
17	9 5/8	244,.5	18 7/8	479.4
18	9 7/8	250.8	20	508.0
19	10 1/2	266.7	22	558.8
20	10 5/8	269.9	24	609.6
21	11	279.4	26	660.4

If you have interests, do not hesitate to contact me,thanks.

nina



product name used TCI Tricone Rock Bits for oilfield