Suborui 135 Degree Split Point HSS 3/16 Double Ended Centre Drill Bit Set for Hardened Metal Steel

• Customization: Available
• Customized: Non-Customized
• Standard: DIN
• Length: Jobber-length
• Type: Twist Drill Bit
• Material: High Speed Steel
• Usage: Metal Drilling
• Shank: Hex
• Transport Package: Single Packing with PVC Plastic Tube
• Specification: 2-10mm
• Trademark: SUBORUI
• Origin: China
• HS Code: 8207509000
• Package Size: 50.00cm * 50.00cm * 50.00cm
• Package Gross Weight: 2.000kg

Product Description

DIA. (MM)	OVERALL LENGTH (MM)	WORKING LENGTH (MM)	DIA. (MM)	OVERALL LENGTH (MM)	WORKING LENGTH (MM)
2.00	38.0	7.5	6.00	66.0	19.0
2.10	38.0	7.5	6.10	70.0	21.2
2.20	38.0	7.5	6.20	70.0	21.2
2.30	38.0	7.5	6.30	70.0	21.2
2.40	38.0	7.5	6.40	70.0	21.2
2.50	43.0	9.5	6.50	70.0	21.2
2.60	43.0	9.5	6.60	70.0	21.2
2.70	46.0	10.6	6.70	70.0	21.2
2.80	46.0	10.6	6.80	74.0	23.6
2.90	46.0	10.6	6.90	74.0	23.6
3.00	46.0	10.6	7.00	74.0	23.6
3.10	49.0	11.2	7.10	74.0	23.6
3.20	49.0	11.2	7.20	74.0	23.6
3.25	49.0	11.2	7.30	74.0	23.6
3.30	49.0	11.2	7.40	74.0	23.6
3.40	52.0	12.5	7.50	74.0	23.6
3.50	52.0	12.5	7.60	79.0	25.0
3.60	52.0	12.5	7.70	79.0	25.0
3.70	52.0	12.5	7.80	79.0	25.0

Double Ended (Inch Size)
DIA. (MM)	OVERALL LENGTH (MM)	WORKING LENGTH (MM)	DIA. (MM)	OVERALL LENGTH (MM)	WORKING LENGTH (MM)
3/32″	9/16″	1-3/4″	7/32″	11/16″	2-3/8″
7/64″	5/8″	1-7/8″	1/4″	7/8″	2-1/2″
1/8″	5/8″	2″	10#	11/16″	2-1/4″
9/64″	5/8″	2″	11#	11/16″	2-1/4″
5/32″	5/8″	2-1/16″	20#	5/8″	2-1/8″
3/16″	5/8″	2-13/16″	30#	5/8″	2″

Company Profile

ABOUT SUBORUI

SUBORUI is a leading manufacturer of high performance twist drills and cutting tools Specializing in high speed steel drill bits, wood drill bits and annular cutter for the global industrial, construction andwoodworking sectors. With 18 years of expertise, we have become a strategic supplier to renowned brands in Europe, North America,South America and the Middle East. Our 20,000 square meter state-of-the-art facility, staffed by 200 skilled professionals, blendscutting-edge technology, strict quality control and customer-centric innovation to deliver tools that redefine precision and reliability.

PRODUCT INSPECTION

Quality Assurance in HSS Raw Materials

MR Cutting Tool Profile Measuring System

Precision Redefined with 5-Axis Inspection

We utilize Thermo ScientificTM Niton XL2 XRF Analyzers to verify the authenticity and composition of high-speed steel (HSS) raw materials, ensuring compliance with international standards (e.g., DIN, ASTM). Our advanced testing guarantees precise element analysis (Cr,Mo, V, etc.) for optimal tool performance.

At our factory, the MR Cutting Tool Profile Measuring System ensures micron-level accuracy in drill contour, angle, and geometry.
Every twist drill is rigorously validated for flawless performance, delivering unmatched precision that meets global industrial standards.

At our factory, we employ state-of-the-art 5-axis inspection systems to ensure unparalleled accuracy in drill geometry and precision. From point angles to helix accuracy, every detail is meticulously verified, delivering tools that exceed industry
standards.

Certifications

HONOR CERTIFICATES

Product Certifications:
20+ Patents: Recognized for innovative designs in drill geometry, coatings, and performance optimization.
CE: Complies with EU safety, health, and environmental standards.
RoHS: Ensures our products are free from hazardous substances, aligning with global environmental regulations.
ISO 9001: Demonstrates our adherence to international quality management standards.
Factory Certifications: 
BSCI: Validates our commitment to ethical labor practices and social responsibility. ICS: Confirms our sustainable and compliant manufacturing processes.

Exhibitions

FAQ

Are you a factory or trading company?

We are 18 years+ professional manufacturer in drill bit tools industry.Welcome to visit our company.

What types of products do you manufacture?
We specialize in producing a wide range of twist drill products, including:
Standard Twist Drills: For general-purpose drilling in wood, plastic, and soft metals. Industrial-Grade Twist Drills: Engineered for high-performance applications in hardened steel, stainless steel, and alloys. Customized Solutions: Tailored drills based on client specifications (material, coating, geometry, or packaging). Whether you need bulk orders or specialized designs, we deliver precision and reliability.

What is your minimum order quantity (MOQ)?
Our MOQ varies depending on the product type, specifications, and packaging requirements. To get a tailored solution, please contact our sales team. We'll respond promptly with a detailed proposal that fits your needs.

How do I purchase your products?
Contact our sales team directly and they will provide you with product catalogues, quotations and order processing services.

What certifications do your products have? Are they environmentally friendly?
Our twist drills are certified with CE (EU safety compliance), RoHS (Restriction of Hazardous Substances), and ISO 9001 (quality management). The RoHS certification guarantees our products are free from harmful substances like lead and mercury, aligning with global environmental standards. We prioritize both performance and sustainability.

Do your products meet quality standards?
Yes, our products are produced strictly in accordance with international and industry standards.We have advanced production equipment and quality control systems to ensure product quality and consistency.

What is your term of payment?

30% by TT in advance,and balance before delivery.

How long is your delivery time?

Generally it is 7-10 days,If the goods are in stock.Or it is 20-30 days. If the goods are not in stock,it is according to quantity.