Powerroc Large Diameter DTH Drill Bit Numa Shank Customized Large Hole Drilling

Name: Powerroc Large Diameter DTH Drill Bit Numa Shank Customized Large Hole Drilling
Brand: Hunan Powerroc Mining Technology Co., Ltd
SKU: 2000122051

Hunan, ChinaHunan Powerroc Mining Technology Co., Ltd

US$600.00-750.00

1 Piece

Sample price:US$600.00/piece.Request sample

Product profile

Customization

Available

Customized

Standard

ISO 9001

Model NO.

Large Diameter DTH Drill Bit NUMA SHANK

Length

Taper-length

Type

Center Drill Bit

Material

Tungsten Carbide

Usage

Well Drilling

Bit Face Design

Concave Full Face

Carbide Button Type

Spherical Heavy Button

Shank Type

Numa125 and Numa165

Bit Diameter Range

230 to 1220 mm (9 to 48 Inch)

Transport Package

Fumigation-Free Solid Wood Case

Specification

DTH Drill Bit

Trademark

PowerRoc

Origin

China

HS Code

8207199000

Production Capacity

10, 000 Pieces/Year

Key features

Dominates Large Diameter Drilling: Engineered for holes from 9 to 48 inches, this bit delivers massive impact energy directly to the rock face.

Eliminate Hole Deviation in Deep Overburden: Stop costly borehole misalignment; our guided bit body and optimized flushing channels maintain a perfectly straight hole path.

25% Faster Completion Rates: Field data from piling contractors shows our multi-stage carbide button layout crushes rock faster and cleans the hole more efficiently.

From Urban Jobsite to Remote Mine, Unmatched Versatility: Whether installing building piles in the city center or drilling a ventilation shaft in the mountains.

2x Bit Body Endurance: Built with thicker outer diameter casing and reinforced shoulder design, our bit withstands the extreme side loads of large-hole drilling far longer than standard alternatives.

Company profile

Hunan Powerroc Mining Technology Co., LtdHunan, China

Business Type: Manufacturer/FactoryNearest Port: CNZOS, CNSHA, CNSZXAverage Response Time: ≤0.52h

About Our Factory & Business Background

AddressMingcheng Lvgu Smart Industrial Park, Renmin East Road, Changsha, Hunan, China

Registered Capital2,000,000 RMB

Average Lead TimePeak Season Lead Time: one month Off Season Lead Time: one month

Our Production Capability & Technical Expertise

Main ProductsMining Products

Our Industry Experience & Global Business Record

Main MarketsSouth America, Africa, Eastern Asia, Eastern Europe, Mid East, Southeast Asia, Western Europe

Product Q&A

Q:How do I choose between NUMA125 and NUMA165 shanks for my rig?

The choice depends on your hammer model. NUMA125 hammers typically drive bits up to 36 inches, while NUMA165 hammers handle the largest diameters up to 48 inches. Please share your hammer model for a precise match.

Q:What flushing options are available for these large bits?

Our standard design features multiple foot valve and side flushing slots for high-efficiency air circulation. We can also customize dual-wall or reverse circulation flushing upon request.

Q:Can this bit be repaired after extended use?

Absolutely. Our thick body design allows for professional re-tipping. As long as the shank is undamaged, the bit body can accommodate new carbide buttons multiple times, greatly extending the total service life.