R28 Reaming Drill Bit Stone Drill Bits CNC Tunneling Mining Quarrying Construction 4148300452-4148300457 manufacturer from China China Hole Saw Online Market

R28 Reaming Drill Bit Stone Drill Bits CNC Tunneling Mining Quarrying Construction

Place of Origin:

Zhejiang, China (Mainland)


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Product Detail

Model No.: 4148300452-4148300457

Description
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Description

This type of bit is used for making large cut holes in drifting and tunneling. A smaller hole is first drilled and then reamed to the final size in combination with a pilot adapter.

• Widely used in drifting and tunneling
• R28 thread system

Color: Green,Blue or Based on Customer requirements

Material: Tungsten carbide and high strength alloy steel

Processing: CNC milling and proprietary heat treatment process

Type: R28 Reaming Bit 6

Applications

• Underground mining
• Tunneling

Competitive Advantage

• High grade tungsten carbide inserts
• Bit bodies manufactured from high grade steel and processed using state-of-the-art CNC machinery and heat treatment

specification

1

Part Number	Bit Diameter (mm)	Bit Diameter (inch)	Front Buttons (No. x mm)	Gauge Buttons (No. x mm)
4148300452	64	2 1/2	2x10	8x9
4148300453	64	2 1/2	4x8	8x9
4148300454	76	3	2x11	8x11
4148300455	76	3	4x10	8x10
4148300456	89	3 1/2	4x11	8x11
4148300457	89	3 1/2	4x10	8x10