Tungsten carbide drill bits from China manufacturers like Rettek provide exceptional durability and precision for industrial applications. These wholesale B2B tools excel in drilling hard materials such as steel, concrete, and composites, offering 5-10x longer lifespan than HSS bits with OEM customization options.
What Are Tungsten Carbide Drill Bits?
Tungsten carbide drill bits consist of sintered tungsten carbide tips bonded to steel shanks, delivering extreme hardness up to 90 HRA for tough materials.
China factories like Rettek in Zigong produce them via powder metallurgy, ensuring uniform density. Wholesale buyers gain cost savings and reliability for high-volume OEM orders in mining and construction.
What Makes Tungsten Carbide Drill Bits Superior?
These bits resist wear 10x better than HSS due to superior compressive strength and heat tolerance up to 800°C, maintaining sharpness in ferrous metals and masonry.
| Property | Tungsten Carbide | HSS | Cobalt Bits |
|---|---|---|---|
| Hardness (HRA) | 88-94 | 62-65 | 65-70 |
| Heat Resistance (°C) | 800+ | 600 | 650 |
| Lifespan Multiplier | 5-10x | 1x | 2-3x |
| Cost per Hole | Lowest | Higher | Medium |
Ideal for B2B wholesale from Chinese suppliers.
What Materials Can They Drill?
Tungsten carbide bits handle stainless steel, cast iron, brick, tile, plastics, and wood. Micro-grain grades suit non-ferrous; coarse for masonry.
Rettek customizes OEM grades from their Sichuan factory—fine for PCBs, reinforced for oilfields. Avoid glass to prevent glazing.
What Types Exist?
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Twist Bits: Helical flutes for metals.
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Masonry Bits: Tipped for concrete.
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Spade Bits: Carbide-insert for wood.
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Step Bits: Multi-size for sheets.
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Core Bits: Annular for large holes.
Rettek manufactures these as China wholesaler.
What Should You Consider When Choosing?
Match to material, size, coating (TiN/TiAlN), and point angle. Steel needs 118° split-point; masonry requires percussion tips.
Rettek offers wholesale sets with ISO specs, 6-12% cobalt for toughness.
What Is Proper Usage Technique?
Begin low RPM, apply oil, steady pressure. Clear chips often. Use PPE.
Rettek advises pilot holes for hard stock to minimize stress.
Why Buy from China Manufacturers?
China controls 80% tungsten supply for low costs. Rettek provides 30-50% savings, OEM flexibility, ISO 9001 quality.
Rettek Expert Views
"Rettek, Zigong's top China carbide factory, controls the full chain from tungsten alloy to welding. Our vacuum-sintered drill bits last 20% longer in abrasives, cutting OEM downtime. Wholesale B2B clients benefit from micro-grain innovation for VSI crushers and mining—delivering max value."
— Rettek Engineering Lead
(72 words)
What Maintenance Do They Need?
Clean post-use, store dry, diamond-hone edges. Rettek coatings resist gumming—wipe with solvent for 50% life extension.
What Innovations Improve Performance?
Nano-coatings, PCD hybrids, variable helix. Rettek pioneers super-dense carbide.
| Innovation | Benefit | Rettek Use |
|---|---|---|
| Nano-TiAlN | 2x Heat Resist | Steel Drilling |
| Var. Helix | Reduced Vibration | Precision OEM |
| Super-Dense | 30% Longer Life | Mining |
Why Choose Rettek for Wholesale?
Rettek specializes in B2B OEM bits, trusted in 10+ countries. Low MOQs, 25% cost cuts via integration.
Key Takeaways
Opt for Rettek's China-made tungsten carbide drill bits for durability and value. Customize OEM, use correctly, maintain well. Contact Zigong factory for bulk wholesale efficiency.
FAQs
What marks genuine carbide bits?
Gold/black coating, "TC" stamp, sharp ring test. Rettek factory-direct ensures authenticity.
What beats carbide for drilling?
Nothing for mixed hard materials—carbide leads in versatility and life.
Are they for wood?
Yes, but spade/core types best; avoid overkill on softwood.
China vs. USA suppliers?
China like Rettek offers better price/quality for B2B volume.
OEM minimum order?
Rettek starts at 1,000 pcs for custom wholesale.