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Estimated doorstep delivery by 21 Nov - 2 Dec from USA
Get Professional Metal Drilling at Competitive Price
Sipery 4mm cobalt drill bits are a high-speed steel set available in India through crowcrowcrow, with M35 cobalt alloy for superior heat resistance and strength. Crafted for tough metals, these bits excel in drilling stainless steel, cast iron, and other hard materials, providing consistent performance and long lifespan.
Made of pure steel alloy with 5% cobalt, Sipery drill bits maintain uniform hardness throughout, allowing repeated sharpening without damage. They are ideal for use on bench drills and compatible with various tool holding systems, making them versatile for professional workshops and home use.
Imported directly from the USA, these drill bits arrive in 1-2 weeks, with all duties and GST included. Their champagne finish and robust construction make them a reliable choice for demanding metalworking tasks in India, offering excellent value and durability.
Premium M35 Cobalt Steel for Heat & Abrasion Resistance
Sipery's drill bits are crafted from M35 cobalt alloy, which enhances heat resistance and durability, allowing for repeated sharpening and long-term use in tough metals. This alloy outperforms standard HSS bits, making it ideal for professional workshops and serious DIYers.
Suitable for Professional & Home Use in India
Designed for drilling hardened metals, stainless steel, and cast iron, these bits are perfect for Indian workshops, metal fabrication, and DIY projects. Skip if working with softer materials or impact drills, as impact use is not recommended.
Typical situations where Sipery 4mm Cobalt Drill Bit 10 Pack | High Speed Steel for Hardened Metal & Stainless Steel helps — illustrative scenarios, not customer reviews.
Rajesh, 35, Mumbai, needs to drill stainless steel for kitchen fittings.
Uses Sipery cobalt bits, drills with bench machine, achieves clean holes, prolongs bit life, saves ₹ on replacements.
| Material | High Speed Steel M35 with Cobalt |
| Hardness | Uniform throughout, high red hardness |
| Finish | Gold Oxide |
| Recommended Use | Drilling hardened metals, stainless steel, cast iron, copper, aluminum, wood |
| Recomm. Cooling | Use with cooling liquid to prolong life |
| Shelf Life | Factory-sealed, use within 12 months of opening |
| Cost per use | ₹195 per bit |
| Reapplication | Sharpen repeatedly for extended use |
| Feature | Sipery 4mm Cobalt | Others |
|---|---|---|
| Material & Heat Resistance | M35 cobalt alloy, high heat resistance, uniform hardness, sharpenable repeatedly | Standard HSS bits, lower heat tolerance, may dull faster, not sharpenable |
| Price per Unit | ₹195 per bit | ₹150-₹300 per bit, depending on brand and quality |
| Durability & Lifespan | Extended lifespan with repeated sharpening, suitable for tough metals | Lower lifespan, prone to dulling, less heat resistant |
| Application Suitability | Ideal for hardened metals, stainless steel, cast iron, with cooling | Mostly for softer metals or general purpose, less heat resistant |
| SKU | tuv2637 |
| GTIN | 0610895309852 |
| Brand | Sipery |
| Size | 4mm / 0.16inch |
| Color | Champagne |
| Shank | Round Straight |
| Blade Length | 43mm / 1.69inch |
About Sipery
Sipery specializes in high-quality drill bits, offering durable, heat-resistant tools for professional and DIY metalworking projects worldwide.
Compliance & Legal
No medical claims, no certifications falsely claimed, factory-sealed, imported from USA, arrives duty-paid, suitable for professional and DIY metalworking in India.
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This item:
Sipery 4mm Cobalt Drill Bit 10 Pack | High Speed Steel for Hardened Metal & Stainless Steel
1,950
This item
Sipery 4mm Cobalt Drill Bit 10 Pack | High Speed Steel for Hardened Metal & Stainless Steel
1,950
Total price:
12,750
You save 4,160 (25%) Extra3 items selected
3 items
12,750You save 4,160 (25%) Extra
| Attributes | Current |  |  |  |  |  | |
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 1,950 2,160 | 6,260 7,980 | 4,540 6,770 | 6,630 9,710 | 3,730 4,160 | 5,440 6,560 | 4,700 4,760 |
| Brand Name | Sipery | Eagle Abrasives | Threadmade | Rubbermaid | ACCUSHARP | Sorority Shop | Breathe Naturally |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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