Premium Black Oxide HSS Drill Bits Manufacturer
Trusted OEM/ODM Partner for Global Brands | HSS Drill Bits
OEM Partner for Industry Leaders
Professional Grade
Black Oxide Drill Bits
Six specialized types engineered for precision metalworking. Choose the perfect solution for your market segment.
Fully Ground Black Oxide HSS Drill Bits
The ultimate standard for precision. Fully ground from solid M2/4341 steel for flawless concentricity and 50% faster chip removal.
Double Ended Black Oxide HSS Drill Bits
Double the life, double the value. 135° split point designed for fast, center-free drilling in thin sheet metals.
Reduced Shank Black Oxide Drill Bits
Drill large holes with standard chucks. Engineered with a 1/2" or 3/8" reduced shank to expand the capacity of portable drills.
Taper Shank Black Oxide Drill Bits
Maximum torque transfer for industrial machines. MT (Morse Taper) shank ensures a secure grip in heavy-duty CNC and drill presses.
Extra Long Black Oxide Drill Bits
Reach the unreachable. Deep-hole drilling solutions with extended flutes for continuous chip clearance in thick metals.
Black Oxide HSS Drill Bits with Bright Ring
Premium retail appeal with dual-finish contrast. The bright edge ensures cooler cutting while the black oxide body retains lubrication.
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From Raw Material
to Shipment
Our comprehensive 8-step manufacturing process ensures every tool meets international quality standards.
Material Inspection
Premium HSS M2/M35 and high-grade carbide materials undergo spectral composition analysis for every batch.
Blank Cutting
Automated cutting machines precisely cut raw materials into standard-length blanks for processing.
Forging & Grinding
Fully automated grinding machines process flutes with precise geometric dimensions for optimal chip evacuation.
Salt Bath Heat Treatment
Controlled quenching and tempering achieve ideal hardness (HRC 63-66) while maintaining toughness.
Sharpen Edge
It creates the precise cutting angles and sharpness needed to slice through metal efficiently.
Final Quality Check
100% sampling or full inspection of concentricity, runout, and hardness ensures zero defective products.
Anti-Rust & Packaging
Anti-rust oil application and packaging in Tenyu Tool or custom plastic boxes/blister cards for protection.
Loading & Shipping
Professional packing ensures products remain moisture-free and undamaged throughout long-distance shipping.
Build Your Private Label:
OEM Packaging That Rivals Global Top Brands
We manufacture the industrial quality. Let's build the next market leader together.
Tenyu Tool on the
Global Stage
Connecting with industry leaders and professional buyers worldwide at premier hardware exhibitions.
EISENWARENMESSE Cologne
National Hardware Show Las Vegas
Canton Fair Guangzhou
Visit Our Manufacturing Facility
Experience our 15 production lines, CNC precision equipment, and quality control processes firsthand. Located in Danyang City, Jiangsu Province, China.
Global Standards &
Certified Quality
Tenyu Tool operates under a strict ISO-certified management system. Our products meet international standards (DIN, ANSI, JIS), ensuring seamless market entry for our global partners.
ISO 9001:2015
Quality management system certification demonstrating our commitment to consistent, high-quality manufacturing processes and continuous improvement.
SGS Audit Report
Third-party factory inspection verification confirming our facility operations, production capacity, and quality control systems meet international standards.
RoHS Certificate
Environmental compliance certification ensuring our products are free from hazardous substances, meeting EU and global market requirements for safe trade.
Everything you need to know about
Black Oxide Drill Bits
Common questions about our high-performance drill bits, customization options, and ordering process.
What are black oxide drill bits primarily used for?
What are black oxide drill bits primarily used for?
They are excellent general-purpose drill bits designed for high-performance drilling into both soft and tough metals (like iron, aluminum, and mild steel), as well as wood, plastics, and PVC.
Can your black oxide drill bits cut through hardened steel?
Can your black oxide drill bits cut through hardened steel?
While they perform exceptionally well on standard metals, for extremely hard materials like hardened steel or thick stainless steel, we recommend exploring our Cobalt Drill Bits series for optimal results.
What makes the black oxide coating beneficial?
What makes the black oxide coating beneficial?
The high-temperature black oxide treatment creates a porous surface that holds lubricants better, significantly reducing friction and heat build-up. This allows the drill bit to last up to 50% longer than standard HSS bits.
What is the Minimum Order Quantity (MOQ) for wholesale buyers?
What is the Minimum Order Quantity (MOQ) for wholesale buyers?
We offer flexible MOQs to support growing brands, importers, and wholesalers. Please send us your specific size requirements and packaging preferences, and our team will provide a tailored factory quote.
Do you support custom OEM branding and private labeling?
Do you support custom OEM branding and private labeling?
Yes, absolutely! With decades of export manufacturing experience, we offer comprehensive OEM solutions, including custom drill bit sizes, laser-etched logos, and bespoke packaging sets (metal boxes, plastic cases, blister packs).
What manufacturing standards do your drill bits meet?
What manufacturing standards do your drill bits meet?
Our black oxide drill bits are precision-manufactured to meet stringent international standards, including DIN338, DIN345, and ANSI, ensuring they fit seamlessly into global markets.
Is it possible to test the quality before placing a bulk container order?
Is it possible to test the quality before placing a bulk container order?
Yes. We are completely confident in our factory's output. Contact us today to request a free sample, and experience the cutting speed and durability of our drill bits firsthand.
What is the estimated lead time for bulk production and shipping?
What is the estimated lead time for bulk production and shipping?
Thanks to our advanced automated production lines and robust capacity, standard bulk orders are typically ready for global dispatch within 30 to 35 days. We also keep standard inventory for even faster turnarounds.
Still have questions? We're here to help.
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Trusted by Global
Industry Leaders
"Tenyu Tool's drill bits deliver exceptional stability when cutting stainless steel. Their M35 series offers the best cost-performance ratio we've tested."
"We require extensive OEM customization. Tenyu Tool's communication efficiency and packaging design capabilities exceeded our expectations."
"Since partnering with Tenyu, we've never experienced a delivery delay. This stability is crucial for managing our inventory pressure."
Ready to Partner with
a Trusted Manufacturer?
Contact us for bulk pricing, custom specifications, or sample requests. Our team responds within 24 hours.