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1. Super long life than normal alloy bits;, 2. High wear resistance;, 3. High impact resistnace toughness;, 4. High efficiency. - details see: https://www.machineto.com/jingwei-coal-mining-roof-bolt-drill-bit-10317424

JINGWEI Coal Mining Roof Bolt Drill Bit

Description:

PDC (Polycrystalline Diamond Compact) is composed of diamond micron powder and cemented carbide liner that are sintered toghether under high temperature and high pressure.It not only has the high wear resistance that diamond has, but also has the high impact-resistant toghness.

Xi'an JINGWEI PDC roof bolting drill bits divided into 2 kinds, one kind is double wings, and the other kind is triple wings.All suitable for drilling the anchor-network support holes in the coal mine. We could supply the size from Φ25 to Φ42mm. And we also could provide the different strength roof bolting bits, like ordinary type,strengthened type, and super strengthened type.

Characteristics:

• Our drill bit adopt the new type material--- superhard PDC cutters as its main cutting tool, so the service life of drilling is 10~30 times longer than the cemented carbide bits under the same rock formation;
• Has high wear resistance and high impact resistance toughness, which reduces the labor intesity;
• Non-diameter reduction and high successful hole rate, which greatly improves drilling effiency in soft and medium-hard rock formation;
• PDC is not easy to be collapsed ensured perfect stability in penetration and hole drilling;
• All of our roof bolting bits could be made to the inner spiral;
• Wide range of application from 5≤f≤12.

Specification:

The application of our PDC drill bits

Model		Rock formatoin
Double wings	Half-piece	Soft-medium hard rock(f≤8)
	the complete-piece	Medium hard rock (f≤10)
	Strengthen half-piece	More integrated hard rock (f≤12)
	Strengthen the complete-piece	Integrated hard rock (f≤12)
Triple wings	Half-piece	More integrated hard rock (f≤12)
	Strengthen half-piece	Integrated hard rock (f≤12)

Data of PDC roof bolting drill bits

Dia. of bit (mm)	Cutting wings		PDC Qty (pies)	Water hole		Thread size
	Shape	Qty		Qty.	Dia.
Φ25	Half piece Complete piece	2	1-2	1	5 mm	16×2
Φ27		2	1-2	1
Φ28		2-3	1-2-1.5	1-4	5-2 mm
Φ30		2-3	1-2-1.5	1-4
Φ32		2-3	1-2-1.5	1-4
Φ42		3	3	3	6 mm

Pictures for reference:

42mm roof bolt drill bit

all kinds of our roof bolt bits