Direct Factory Sourcing. Custom Engineering. Reliable Supply.
As a procurement manager or industrial importer, you aren't just looking for a tool; you are looking for a consistent supply chain. You face the daily pressure of balancing tool longevity, precision tolerances, and cost-per-hole, all while managing lead times that keep your inventory moving.
Whether you are supplying automotive assembly lines or distributing to local hardware wholesalers, you need a manufacturer that understands the difference between a "DIY retail bit" and an industrial-grade cutting tool. At Tenyu Tool, we bridge that gap by offering engineered solutions that outlast standard bits by up to 40% in stainless steel applications.
We are a leading manufacturer of custom step drill bits, offering full OEM and ODM services. We specialize in high-performance HSS and cobalt steel bits with custom geometries, coatings, and branding for industrial distributors.
We want you to have a partner that delivers tools tailored to your market's specific needs, on a reliable schedule. Let me show you how our design flexibility and manufacturing process support your brand.
Professional Customization Services for Your Unique Step Drill Requirements
Generic off-the-shelf tools often fail in specialized industrial environments. Our OEM service is designed to eliminate the "forced fit." We manufacture tools based on your specific CAD drawings or workpieces.
We offer complete customization of step drill bits, including flute design, shank type, and step dimensions. This allows you to create a unique product line optimized for your customers' specific applications.
A custom tool solves specific problems. We provide the engineering support to turn your idea into a product that outperforms standard options, giving you a competitive advantage in your market.
Tailored Flute Designs: Straight, Spiral, and Multi-Flute Options
The geometry of the flute determines chip evacuation speed and heat buildup.
- Spiral Flutes1: Best for handheld drilling; they reduce vibration and "pull" the bit through the material for a smoother finish.
- Straight Flutes: Ideal for CNC applications where rigidity is paramount.
Precision Shank Engineering: Hex, Round, and Three-Flat Designs
A slipping bit is a ruined workpiece. We offer shank customization to fit any chuck system:
- 1/4" Hex Shanks: Optimized for impact drivers and quick-change systems.
- Three-Flat Shanks: Prevents spinning in standard 3-jaw chucks under high torque.
Specialized Step Heights and Diameters for Industrial Applications
Stop settling for "standard" steps. If your project requires a specific 12.5mm step between a 10mm and 15mm transition, we grind it to your exact specification. We handle:
- Non-standard diameter increments.
- Customized step heights for varying material thicknesses.
- Integrated countersink stages for one-step hole finishing.
Industrial-Grade Materials and Advanced Coating Technologies
The "High-Performance" claim is backed by metallurgy. We don't cut corners on raw materials because we know that tool failure in the field is the fastest way to lose a client.
We use premium HSS M2, M35 Cobalt, and Solid Carbide materials, combined with advanced coatings like TiN and TiAlN. This ensures maximum tool life and performance in demanding applications like stainless steel drilling.
The right material and coating determine how long a tool lasts. We use high-grade substrates and protective layers to give your customers a product that resists wear and heat, reducing their cost per hole.
HSS M2, M35 Cobalt, and Solid Carbide: Selecting the Right Substrate
Choosing the right material is a balance of toughness and heat resistance:
| Material Grade | Cobalt Content | Best For | Tool Life |
|---|---|---|---|
| HSS M2 (Fully Ground) | 0% | General purpose plastics, wood, and mild steel. | Standard |
| HSS-Co M35 | 5% | Stainless steel (304/316), hard alloys, and high-heat tasks. | 3x Longer |
| HSS-Co M42 | 8% | Heavy industrial use, titanium, and abrasive metals. | 5x Longer |
| Solid Carbide | N/A | High-speed CNC production and hardened materials. | Maximum |
High-Performance Coatings: TiN, TiAlN, and Black Oxide
Coatings aren't for aesthetics; they are thermal barriers.
- TiN (Titanium Nitride): Increases surface hardness and extends life in general steel drilling.
- TiAlN (Titanium Aluminum Nitride): The gold standard for high-heat applications where no coolant is used.
- Black Oxide2: Improves lubricant retention and prevents galling (material welding to the bit).
Your Reliable OEM/ODM Partner for Step Drill Wholesale
We understand that for an importer, the product is only half the battle. The other half is branding, logistics, and marketability.
We provide full OEM services, including custom laser etching, flexible packaging, and efficient global logistics. This allows you to build and supply your own branded product line with reliable factory support.
A strong brand identity builds customer loyalty. We help you create that identity with professional marking and packaging, making your products stand out on the shelf and in the workshop.
Custom Branding and Laser Etching for Global Distributors
We help you build your own brand equity3. Our in-house laser marking machines can apply:
- Your company logo.
- Custom part numbers and size markings.
- Country of Origin (COO) requirements for customs compliance.
Flexible Packaging Solutions: From Bulk Packs to Retail-Ready Cases
Whether you sell to factories or retailers, we have the right housing:
- Bulk Industrial Packs: Oiled and wrapped for large-scale tool cribs.
- Individual Plastic Tubes: Square or round tubes with hang-holes.
- Custom Metal/Plastic Sets: Multi-piece kits in branded blow-molded cases or aluminum boxes.
FAQ: Frequently Asked Questions for B2B Buyers
1. What is the minimum order quantity (MOQ) for custom step drills?
For standard sizes with custom laser etching, our MOQ starts at 100 pieces. For completely custom geometries requiring new CNC programming, the MOQ is typically 300-500 pieces depending on the complexity.
2. Can you produce step drills based on metric and imperial sizes in the same bit?
Yes. As a custom manufacturer, we can grind steps in any combination of millimeters and inches to meet specific regional market needs or specialized industrial requirements.
3. How do you ensure quality consistency across large batches?
We implement a three-tier QC process:
- Raw Material Spectrometer Testing (verifying Cobalt content).
- In-Process CNC Monitoring (real-time tolerance checks).
- Final 100% Optical Inspection of cutting edges before packaging.
4. How long does a typical custom order take from design to delivery?
Usually, sample production takes 7-10 days. Once the sample is approved, mass production typically takes 25-35 days, depending on the order volume and coating requirements.
5. Do you offer free samples for testing?
We provide free samples of our standard high-performance range for qualified distributors and high-volume importers. Custom-engineered samples may incur a small tooling fee, which is credited back upon your first bulk order.
Conclusion
Tenyu Tool provides the technical depth of an engineering firm with the pricing power of a direct manufacturer. Ready to upgrade your inventory?
Explore this link to understand how Spiral Flutes enhance drilling efficiency and reduce vibration. ↩
Discover the advantages of Black Oxide coatings, including their role in improving lubricant retention and preventing galling in tools. ↩
Understanding brand equity is crucial for building a strong business identity and increasing customer loyalty. ↩