< >

R28 Thread Button Bit

Drill bits, known as top hammer rock drill bits. During the rock drilling process, the drill bit is in direct contact with the rock, and is the most vulnerable part of the rock drilling tool. The rock drilling bit is subjected to various complex cyclic loads such as tension, extrusion, torsion and bending, and under the condition of high-speed rotation of the bit and the collision of the rock, so There are high requirements on the technology of the drill bit.

Contact Now E-Mail Telephone WhatsApp

Product Details

Features:

The "Tianyue" brand rock drilling bits produced by our company have the following properties:

1.High enough surface hardness. It can improve the wear resistance of rock drilling bits, the ability of rock drilling bits to resist contact fatigue and bending fatigue, and the surface has a certain plasticity, which can reduce stress concentration and improve the service life of rock drilling tools.

2.Good strength and toughness matching. While the surface has high hardness, high strength and a certain degree of plasticity, the core of the rock drilling tool has high yield strength and toughness, so that the surface of the rock drilling tool can be carburized when it bears a large contact stress or bending load. The layer transition area will not cause early damage to the seepage layer due to plastic deformation.

3.Good processing performance. It is required that the steel has good plasticity at high temperature, and the forgings are easy to form during the forging process; at the same time, it should have good cutting performance, the hardness after annealing is less than HB260, but it is not easy to be too soft, so as not to stick to the knife and affect its processing quality; hardenability Well, the air-cooled hardness should reach HRC35-50; the drilling tool steel for hot cogs should have a high coefficient of linear expansion in the temperature range of the hot cogs, and maintain high hardness, strength and toughness in a reasonable match.

4.Certain corrosion resistance.

Button bit	Diameter		No×button diameter			Flushing hole		Weight approx kg	TIANYUE P/N
Button bit	mm	inch	Front	Gauge	Angle	Front	Side	Weight approx kg	TIANYUE P/N
	Spherical Buttons
	37	1 29/64	2×7	5×9	30°	1	1	0.5	1431-37R28-27/59-45-41
	38	1 1/2	2×8	4×9	30°	1	2	0.6	1431-38R28-28/49-45-41
	38	1 1/2	2×7	5×9	30°	1	1	0.6	1431-38R28-27/59-45-41
	41	1 5/8	2×8	5×9	35°	1	1	0.7	1431-41R28-28/59-45-41
	43	1 11/16	2×9	5×9	35°	1	2	0.8	1431-43R28-29/59-45-41
	45	1 3/4	2×9	5×10	30°	1	2	0.9	1431-45R28-29/510-45-41
	45	1 3/4	3×8	6×9	35°	1	3	0.9	1431-45R28-38/69-45-41
	Parabolic Buttons
	37	1 29/64	2×7	5×9	30°	1	1	0.5	1431-37R28-27/59-45-51
	38	1 1/2	2×8	4×9	30°	1	2	0.6	1431-38R28-28/49-45-51
	38	1 1/2	2×7	5×9	30°	1	1	0.6	1431-38R28-27/59-45-51
	41	1 5/8	2×8	5×9	35°	1	1	0.7	1431-41R28-28/59-45-51
	43	1 11/16	2×9	5×9	35°	1	2	0.8	1431-43R28-29/59-45-51
	45	1 3/4	2×9	5×10	30°	1	2	0.9	1431-45R28-29/510-45-51
	45	1 3/4	3×8	6×9	35°	1	3	0.9	1431-45R28-38/69-45-51
	48	1 7/8	2×9	5×11	30°	1	2	1	1431-48R28-29/511-45-51
	48	1 7/8	3×8	6×9	35°	1	3	1	1431-48R28-38/69-45-51

Product	Button Bit
Other Names	Button drill bit,Thread button bit,Thread drill bit,Rock drill bit,Top Hammer drill bit,Drill bit,Rock bit,Hard rock dilling tools,Rock dill tool,Rock tools,Top Hammer drilling tools,Mining drill bit
Material	23CrNi3Mo
Application	Tunnelling, Mining, Quarrying, Ore Mining,Blasting and Infrastructure Construction,Facedrilling and Bolting, Bench Drilling, Production drilling, Long hole drilling, Drifting.
Thread	R25, R28, R32, R35, R38, T38, T45, T51, ST58, ST68, GT60, SR28, SR35...
Bit Type	Thread Button Bit,Retrac Button Bit,Reaming Button Bit，Cross Bit，Chisel Bit
Skirt Design	Standard skirt, Retrac skirt, Straightrac skirt, Heavy duty skirt
Face Design	Flat face, Drop center face, Convex face, Reaming type, Cross type
Button Shape	Spherical buttons, Ballistic buttons, Conical buttons, Composite buttons
Head Diameter	28mm~152mm
Custom Design	Size,Color

Face Design	Application
	Flat face button drill bits are suitable for all rock conditions, especially for the rock with higher hardness and higher abrasiveness. Such as granite and basalt.
	Convex Face button bits are designed for fast penetration rates in softer rock.
	Drop center button drill bits are mainly suitable for the rock with low hardness, low abrasiveness, and good integrity. The bits can drill straighter holes.
	Normal Skirt For drilling in very hard and abrasive rock formations.
	Retract Skirt For drilling in loose,broken or fissured rock where it is difficult to retract the drill string due to the hole collapse.

Button Shape
	R：Round Utility carbide shape. Stong configuration against carbide fracture.
	B:Ballistic Higher penetrating carbide shape than Semi ballistic shape. Recommended for soft rock.
	BB：Semi Ballistic Combined wear resistance and high penetration rate. Recommended for medium-hard rock with moderate abrasitivity.
	SA:Spike Highest penetrating carbide shape. Weak configuration against carbide fracture. Recommended for soft to medium-hard work.