Hard Rock Drilling Roller Bits

Model:	roller bit
Brand:	DRILLSTAR
Origin:	Made In China
Category:	Industrial Supplies / Mining Machine
Label:	roller bit , teeth , tooth
Price:	US $5 / pc
Min. Order:	50 pc

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Product Description

Roller bits are mainly divided into two types:

i) Metal sealed roller bits

ii) Rubber sealed roller bits

Metal sealed roller bits main applications:

a) Adopted high-speed bearing metal sealed technology, long available time under the screw drilling condition.

b) High efficiency cutting edge and structure to improve drilling speed.

c) Cutter shell self-protection shape to reduce abrasion of detritus and unbreakable rock.

d) Best choice for directional well, horizontal drainhole and horizontal branch wells.

Size (inch)	Connection (API REG)
5 7/8”,6”,6 1/2”,6 3/4”	3 1/2”
7 7/8”,8 1/2”,8 3/4”	4 1/2”
9 1/2”,9 5/8”,9 7/8”,12 1/4”,12 1/2”,13 1/8”,13 5/8”	6 5/8”
16”,17 1/2”	7 5/8”

Rubber sealed roller bits main applications:

a) Adopted new alloy welding technology to improve abrasion and available time.

b) Multiple gauge structure, weld trimming teeth on the edge to enhance gauge protection ability.

c) High precision with radial sliding, two thrust rubber sealed bearing and optimized anti-seizure ability to avoid bits peel off.

Size (inch)	Connection (API REG)
5 1/2”,5 7/8”,6”,6 1/2”,6 3/4”	3 1/2”
7 1/2”,7 7/8”,8 1/2”,8 3/4”	4 1/2”
9 1/2”,9 5/8”,9 7/8”,12 1/4”,12 1/2”,13 1/8”,13 5/8”	6 5/8”
14 3/4”,15”,15 1/2”,16”,17 1/2”,20”,26”	7 5/8”

IADC Code	Formation condition	Recommend
IADC Code	Formation condition	Pressure/diameter kn/mm	Speed r/mm
115, 117	Low compressive strength and high drillability of soft stratum, such as soft shale, clay, gypsum, etc	0.35-0.90	150-80
124, 126, 127	Low compressive strength and high drillability of soft stratum, such as, soft shale, clay, gypsum, soft limestone, etc	0.35-1.00	150-70
136, 137	Low compressive strength of the soft to medium formation, or there is a hard interlayer in soft rock, such as anhydrite, soft limestone, sandstone, etc	0.35-1.05	120-60
217, 227	High compressive strength, hard, thick interlayer, such as hard shale, limestone, sandstone, dolomite, etc	0.50-1.20	100-50
437, 447	Low compressive strength and high drillability of soft stratum, such as soft shale, clay, gypsum, etc	0.35-0.90	140-60
515, 517, 527	Low compressive strength and high drillability of soft stratum, such as shale, clay, sandstone, limestone, etc	0.35-1.05	120-50
537, 547	Low compressive strength, medium-soft, hard abrasive interbedded, such as hard shale, anhydrite, soft limestone, sandstone, ham sandwich dolomite	0.35-1.05	110-40
617, 627, 637	High compressive strength, medium-hard and abrasive high formation, such as limestone, dolomite, sandstone, chert, etc	0.70-1.20	150-40
737	Hard strata with high abrasive, such as limestone, dolomite, flint, hard sandstone, etc	0.70-1.30	70-40

DRILLSTAR also manufactures different designs of bits for all brands/models of excavators. Moreover, it can also manufacture bits or drilling tools for different applications of any new design as per requirement of the customer.