Tired of broken hole saws and late shipments?
As a purchasing manager or tool importer, your reputation depends on the quality you supply. Inconsistent tooth breakage, poor heat resistance, and rigid factory policies can reduce your profit. You need a reliable source.
With over 20 years of manufacturing expertise in Danyang, Jiangsu, Tenyu Tool delivers industrial-grade M42 8% cobalt bi-metal hole saws directly to your warehouse. We eliminate the middlemen, providing flexible MOQs, fast lead times, and complete OEM packaging solutions designed to support your brand build up in the future.
Premium M42 Bi-Metal Hole Saws: Engineered for Industrial Use
Your professional customers—electricians, plumbers, and fabricators—do not tolerate tool failure during work. We engineer our bi-metal hole saws for heavy-duty metalworking, helping users achieve stable cutting performance through stainless steel, cast iron, thick sheet metal, aluminum, wood, and plastic.
The M42 8% Cobalt Advantage Over Standard M3
Not all high-speed steel is the same. Many low-cost suppliers use standard M3 steel, which may dull quickly under high friction and high-temperature cutting conditions. Tenyu Tool upgrades the cutting edge with M42 HSS containing 8% cobalt1.
- Extreme Heat Resistance: Cobalt helps retain hardness during stainless steel and metal cutting.
- Hervorragende Abriebfestigkeit: The teeth stay sharper for longer compared with standard low-grade alternatives.
- Better Cost-Per-Cut: Longer tool life helps end-users reduce replacement frequency and builds stronger brand loyalty for your private label.
Advanced Tooth Design: Variable vs. Constant Pitch
Different applications require different chip clearance and cutting stability. We manufacture both tooth designs so you can match your market demand.
- Variable Pitch 4/6 TPI: Reduces vibration and noise while improving chip removal. Ideal for pipes, irregular shapes, and thick metal.
- Constant Pitch 6 TPI: Provides smoother and more uniform cutting. Suitable for thinner materials, sheet metal, wood, and applications requiring a cleaner finish.
Complete Technical Specifications & Size Availability
Procurement efficiency matters. You do not want to search across multiple suppliers to complete your product catalog. Tenyu Tool provides a wide diameter range, helping importers, wholesalers, and distributors sourcing complete hole saw inventory from one manufacturing line.
Bi-Metal Hole Saw Specification Matrix
| Cutter Diameter | Inch Size | Cutting Depth | Material | TPI | Recommended Arbor |
|---|---|---|---|---|---|
| 14mm - 30mm | 9/16" - 1-3/16" | 38mm / 47mm | M42 8% Cobalt | 4/6 Variable | A2 / A4 Small Hex |
| 32mm - 60mm | 1-1/4" - 2-3/8" | 38mm / 47mm | M42 8% Cobalt | 4/6 Variable | A1 / A6 Large Hex |
| 64mm - 114mm | 2-1/2" - 4-1/2" | 38mm / 47mm | M42 8% Cobalt | 4/6 Variable | A1 / A6 / A10 |
| 121mm - 152mm | 4-3/4" - 6" | 38mm / 47mm | M42 8% Cobalt | 4/6 Variable | A1 / A6 Heavy Duty |
| 160mm - 210mm | 6-1/4" - 8-1/4" | 38mm / 47mm | M42 8% Cobalt | 4/6 Variable | A1 / A6 Heavy Duty |
Standard and Deep Cutting Depths
We offer two main cutting depths to match different market needs.
- 38mm / 1-1/2": Standard cutting depth for general pipe, plastic, wood, and construction materials.
- 47mm / 1-7/8": Deep-cut design for thicker materials and 2x4 framing lumber2, especially popular in North American and European markets.
Full Diameter Range from 14mm to 210mm
From small conduit holes to large HVAC duct openings, our production line supports a complete diameter range from 14mm to 210mm. This allows importers to simplify sourcing and build a complete product series for local distribution.
OEM & Custom Packaging Solutions for Importers
You are not only buying tools. You are building a product line for your brand. Tenyu Tool works as your manufacturing partner, helping you prepare retail-ready products with customized branding, packaging, and size combinations.
Custom Logo Laser Engraving
We use laser marking to engrave your brand logo, size details, and safety information directly onto the hole saw body. Compared with stickers, laser marking is more durable3 and keeps your brand visible throughout the product life cycle.
Retail-Ready Packaging Options
Packaging affects both shelf appeal and customer confidence. We provide multiple packaging solutions for different sales channels.
- Double Blister Cards: Suitable for supermarkets, hardware stores, and retail pegboards.
- Plastic Tubes or Hangers: Cost-effective and durable for wholesale and industrial distribution.
- Color Boxes: Suitable for e-commerce brands and organized warehouse storage.
- Aluminum or Plastic Cases: Ideal for professional hole saw kits and higher-value product lines.
Tailored Hole Saw Kits
Combo kits are profitable for importers and tool distributors. We can assemble custom sets based on your local market demand.
- Electrician Sets: Common sizes for conduit and wiring installation, such as 22mm, 29mm, 35mm, 44mm, 51mm, and 64mm.
- Plumber Sets: Practical sizes for pipe clearance, such as 19mm, 22mm, 29mm, 38mm, 44mm, and 57mm.
- Custom Mix: Send us your preferred size list, and we will build the kit according to your sales channel.
Direct from the Manufacturer: Tenyu Tool Quality Control
Trust is built on stable quality. When sourcing globally, importers cannot afford unstable batches, high defect rates, or repeated customer complaints. Cooperate with us, you will see strict quality control is applied throughout production.
High-Precision Welding Technology
The weld seam is one of the most important quality points of a bi-metal hole saw. We use advanced welding technology to connect the M42 high-speed steel cutting edge with a tough alloy steel backing. This helps prevent tooth stripping and improves durability under high-torque cutting conditions.
Strict Quality Inspection Process
Before shipment, each order goes through multiple inspection steps.
- Härteprüfung: The cutting edge is checked to ensure stable hardness and wear resistance4.
- Runout and Concentricity Checks: Roundness is controlled to reduce wobbling and oversized holes.
- Cutting Performance Test: Batch samples are tested on metal materials to verify tooth strength and cutting stability.
- Packaging Inspection: Logos, labels, sizes, and packaging details are checked before shipping.
Flexible MOQ and Fast Global Shipping
We understand the cash flow is very important for importers and wholesalers. Tenyu Tool supports trial orders and flexible MOQ solutions to help you test your market. After order confirmation, our supply chain supports stable production and global shipment options, including FOB, CIF, or DDP according to your requirements.
Häufig gestellte Fragen
Can I request OEM samples with my logo?
Yes. You can send your logo file, required sizes, and packaging style. We can prepare samples according to your OEM requirements.
Can you make customized hole saw kits?
Yes. We can customize electrician sets, plumber sets, and mixed-size hole saw kits according to your local market needs.
Can you consolidate shipments with other tools?
Yes. Tenyu Tool can consolidate bi-metal hole saws with drill bits, saw blades, diamond blades, and other power tool accessories to help reduce freight costs.
What is a Bi Metal Hole Saw?
A bi metal hole saw is a cutting tool made from two different metals. The cutting edge is usually high-speed steel, while the body is made from tougher alloy steel. This structure gives the hole saw both sharp cutting performance and strong impact resistance, making it suitable for metal, wood, plastic, and general construction materials.
Can Bi Metal Hole Saw Cut Wood?
Yes. A bi metal hole saw can cut wood, plywood, MDF, plastic, and even wood with nails. Compared with standard carbon steel hole saws, bi metal hole saws offer better durability and heat resistance. For clean wood cutting, users should choose the correct size, use steady drilling speed, and remove chips during deep cutting.
What is a Bi Metal Hole Saw Used for?
A bi metal hole saw is used for drilling round holes in metal, wood, plastic, drywall, pipe, and sheet materials. It is commonly used by electricians, plumbers, HVAC installers, metal fabricators, and construction workers. For wholesalers and importers, it is a practical product because it covers many professional drilling applications with one tool category.
Schlussfolgerung
Scaling your hardware business requires a supplier that understands both manufacturing quality and international trade needs. By choosing M42 8% cobalt bi-metal hole saws, you can reduce quality complaints, improve product value, and build stronger trust with your customers.
Tenyu Tool is ready to support your market expansion with stable quality, OEM packaging, flexible MOQ, and direct factory supply.
Get Your Custom Wholesale Quote Within 12 Hours
"A materials reference or metallurgical handbook can substantiate that AISI M42 high-speed steel is a cobalt-bearing molybdenum high-speed steel with a nominal cobalt content of about 8%, establishing the alloy identification used here. Evidence role: definition; source type: institution. Supports: M42 HSS is a high-speed steel grade that contains approximately 8% cobalt.. Scope note: This supports the standard composition of M42 HSS, not the specific chemical analysis of any individual supplier’s product. ↩
"The source identifies nominal 2×4 dimensional lumber as having an actual thickness of about 1.5 inches, supporting the dimensional rationale for a 47 mm cutting depth to clear a typical 2×4 thickness. Evidence role: general_support; source type: government. Supports: A 47 mm / 1-7/8 inch cutting depth is suitable for thicker materials such as 2x4 framing lumber.. Scope note: This supports dimensional compatibility, not tool performance across all lumber species, moisture conditions, or cutting setups. ↩
"Studies and technical references on laser marking describe it as a direct, permanent surface-marking process that can provide wear- and corrosion-resistant identification on metals, supporting the durability comparison with adhesive labels in general terms. Evidence role: general_support; source type: paper. Supports: Laser marking is more durable than stickers for product identification on the hole saw body.. Scope note: The source may support the general durability of laser-marked metal surfaces but may not directly compare every sticker material or hole saw application. ↩
"Materials-engineering references describe hardness testing as a standard method for assessing resistance to indentation and as a property commonly associated with wear resistance in cutting and tooling applications. Evidence role: mechanism; source type: education. Supports: Hardness testing of a cutting edge helps assess stable hardness and wear resistance.. Scope note: This supports the general relationship between hardness testing and wear-resistance assessment, not the specific inspection results of any shipment. ↩