Name: SD12 DTH Drill Bit – 12 Inch Large Hole Mining DTH Button Bit for 305-500mm Well Drilling (Down the Hole Hammer Bit)
Brand: KSQ Technologies (Beijing) Co. Ltd
SKU: SD12
Price: 3900 USD
Availability: InStock

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SD12 DTH Drill Bit – 12 Inch Large Hole Mining DTH Button Bit for 305-500mm Well Drilling (Down the Hole Hammer Bit)

Product Details:

Place of Origin:	CHINA
Brand Name:	MIROC
Certification:	ISO
Model Number:	SD12

Payment & Shipping Terms:

Minimum Order Quantity:	1
Price:	$3900
Packaging Details:	Wooden cases
Delivery Time:	20-30
Payment Terms:	L/C,D/A,D/P,T/T,Western Union
Supply Ability:	3000

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Detailed Product Description

Model NO.:	SD12	Manufacturing Process:	Forging
Material:	Alloy Steel	Face Shape:	Flat ,Concave,Convex
Button Shape:	Ballistic, Spherical, Semi-Ballistic	Shank:	SD12
Application:	Mining, Quarry, Water Well Drilling, Foundation	Rock Formation:	Limestone, Granite, Basalt Etc
Color:	On Request	Condition:	100% New
Highlight:	12 inch DTH drill bit , mining DTH button bit , large hole well drilling bit

SD12 DTH Drill Bit – 12 Inch Large Hole Mining DTH Button Bit

Professional 12-inch DTH (Down-The-Hole) drill bit designed for 305-500mm well drilling applications in demanding mining and construction environments.

High-Performance DTH Drill Bits for Deep Hole Drilling

Engineered for high-pressure drilling operations, our 12-inch DTH drill bits deliver consistent penetration rates even in deep holes. Direct piston-to-bit contact minimizes energy loss, ensuring efficient rock fragmentation across long borehole lengths.

Available Options

Colors: Green, Blue, or custom requirements
Customization: Match bits to your hammer by hole diameter and spline configuration
Custom Features: Tungsten carbide insert profile, face profile, and flushing hole design

Insert Profile Selection Guide

Ballistic Inserts

Best for: Soft and medium compact, low abrasive rocks
Produces: Large cuttings
Not suitable for: Badly fractured rocks

Domed Inserts

Best for: Very hard, abrasive rocks and deep hole drilling
Features: Strong, rugged shape for high performance and long service life in all conditions

Semi-Ballistic Inserts

Best for: All soft and medium rock conditions, including fractured and fissured rocks

Face Profile Selection Guide

Face Type	Best Rock Conditions	Key Benefit
Flat Face	All conditions, especially fractured/fissured rocks & changing formations	Reliable, alternative design
Concave	All conditions, especially deep hole drilling	Inverted pilot improves hole alignment
Convex	All conditions, especially hard abrasive rock	Balances fast drilling with long service life

Key Features & Technical Specifications

Direct piston-to-bit contact for minimal energy loss
Nearly constant penetration rate regardless of hole length
Medium to large drilling diameters
Works in high-pressure range for deep hole lengths
High-grade tungsten carbide inserts
Bit bodies: high-grade steel with CNC machining and advanced heat treatment

Technical Specifications Table

Head Shape	Head Diameter (mm)	Shank Length (mm)	Spline	Port holes	Button Type	Gauge Buttons	Front buttons	Weight (Kg)
Convex-Concave Face	305	470	8	3	Spherical	15XΦ20	27XΦ18+8XΦ16	146.5
Convex-Concave Face	311	470	8	3	Spherical	15XΦ20	27XΦ18+8XΦ16	147
Convex-Concave Face	325	470	8	3	Spherical	15XΦ20	27XΦ18+9XΦ16	156
Convex-Concave Face	350	470	8	4	Spherical	16XΦ20	32XΦ18+13XΦ16	166
Convex-Concave Face	381	470	8	4	Spherical	16XΦ20	36XΦ18+18XΦ16	184
Convex-Concave Face	400	470	8	4	Spherical	16XΦ20	40XΦ18+28XΦ16	199
Convex-Concave Face	445	470	8	4	Spherical	20XΦ20	48XΦ18+25XΦ16	237.5
Convex-Concave Face	500	470	8	4	Spherical	24XΦ20	90XΦ18	293