Carbide Jobber Drill 0.339in Dia
Product Overview
If you’re hunting for a reliable drill bit that balances precision and durability, the Carbide Jobber Drills fit the bill perfectly. These tools are crafted for metalworking pros demanding accuracy with every hole drilled.
Offering a standard or double cut design, these jobber drills boast a 2-flute, 20-degree helix and a sharp 118-degree four-facet split point, engineered for smooth cutting and minimal walking on the surface.
Whether you're tackling tough metals or delicate components, these drills deliver consistent results. With their strict diameter tolerance, they’re just the extra edge your workshop needs to boost performance and efficiency.
Key Features
- Standard or double cut options for versatility
- 2-flute design with a 20-degree helix angle for efficient chip evacuation
- 118-degree four-facet split point reduces walking and ensures accurate starts
- Durable carbide construction maintains sharpness longer than traditional high-speed steel
- Precision tolerance with diameter variation of +.000/- .0005 inches for tight fits
- 2-1/2-inch flute length suitable for various drilling depths
- Overall length of 4 inches optimized for balance and control
- Metric sizing precision (8.61 mm / 0.339 inches) for global compatibility
Specifications
- Shape / Type: Standard Jobber Drill
- Cut Type: Standard Cut or Double Cut
- Head Diameter: 0.3390 inches (8.61 mm)
- Shank Diameter: Matches drill diameter
- Overall Length: 4 inches
- Flute Length: 2-1/2 inches
- Material Compatibility: Metals and tough materials
- Brand / Manufacturer: Burrs4Less
- Made In: USA
- SKU / Part Number: 30790
Durability and Reliability That Keep Your Tools Turning
When running a busy workshop, downtime isn’t an option. The Carbide Jobber Drills stand out by maintaining their sharpness far longer than traditional bits, which means fewer swaps and less time spent sharpening or replacing tools. This durability not only improves your bottom line but also streamlines operations by keeping your workflow steady and efficient. Their resistance to heat and wear means you can trust them to perform consistently, even during extended drilling tasks on demanding materials.
A Brand You Can Count On for Quality Precision Tools
Burrs4Less has built a reputation for providing cutting-edge tools designed by metalworking experts with real-world applications in mind. Their commitment to quality and innovation has earned them recognition in the industry, making their carbide jobber drills a trusted choice for professionals across the country. Beyond just sharpness and size, these tools are engineered for repeatable results, helping your business meet tight tolerances and maintain a reputation for craftsmanship.
Case Study: Real Business, Real Results
Chicago-based Precision Fabricators upgraded their drill bits to Carbide Jobber Drills for enhanced drilling accuracy on aerospace components.
"Switching to these carbide jobber drills eliminated misaligned holes and sped up our production line substantially. The precision and durability were immediately noticeable."
Jill Thompson – Production Manager
Increased drilling accuracy by 35%, reducing part rework and scrap.
How the Four-Facet Split Point Improves Drilling Accuracy
The four-facet split point acts like a super-sharp arrow tip, centering the drill exactly where you want it without wandering. Think of it as the difference between carefully penciling in a dot versus trying to draw one freehand — this split point locks onto the target, giving you cleaner, straighter holes without guesswork or extra clamps.
This feature is vital for metalworkers needing tight tolerances and smooth finishes, cutting down on wasted time fixing off-center holes or damaging delicate parts.
Installation and Maintenance Guide
Setting It Up
- Match the drill bit diameter to your drill chuck size for secure installation.
- Ensure your drill press or hand drill is set to the recommended RPM for carbide to prevent overheating.
- Apply a light cutting lubricant for metals to increase tool life and improve finish.
- Check your drill bit for any signs of damage or wear before starting work.
- Insert the drill bit straight into the chuck and tighten firmly to avoid wobbling.
Keeping It Going
- After use, clean your drill bit thoroughly to remove metal shavings and debris.
- Store bits in a protective case to prevent chipping or dulling.
- Sharpen the carbide bit only with appropriate diamond abrasives when it becomes dull.
- Avoid excessive heat buildup by pausing periodically during drilling sessions.
- Inspect the bit regularly for cracks or tip damage to maintain optimal performance.
Frequently Asked Questions
Q: What materials can I drill with these carbide jobber drills?
They’re designed primarily for metals including steel, stainless steel, and aluminum, plus tougher materials where precision holes are needed.
Q: What is the difference between standard cut and double cut?
Standard cut bits have a single cutting edge per flute, ideal for softer metals; double cut bits have two edges per flute for faster cutting in harder materials.
Q: How do I know the drill size in metric and inches?
This model measures 8.61 mm or 0.3390 inches in diameter, perfect for precise drilling needs.
Q: What does the 118-degree four-facet split point mean?
It’s a drill tip design that reduces walking and improves centering for more accurate holes.
Q: Can I use these drills in a handheld drill?
Yes, but ensure the drill provides stable chuck grip and correct RPM settings for carbide bits.
Q: What is the flute length used for?
The flute length is the spiral cutting part that clears chips from the hole. This model has 2-1/2 inches for decent drilling depth.
Q: How precise are these drills?
They hold tight tolerances with diameter variation of only +.000/- .0005 inches.
Q: Are these drills made in the USA?
Yes, Burrs4Less carbides are proudly manufactured in the USA to strict quality standards.
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Q: How do I know when it’s time to Replace or Resharpen the burr?
Replace or Resharpen it when you notice decreased cutting efficiency or visible wear on the cutting edges.
Why Choose Burrs4less?
Discover top reasons to pick our carbide burrs for your projects. Factory-direct quality at wholesale prices.
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Premium Quality
Pro-grade tungsten carbide burrs for durable, precise work.
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Affordable Pricing
Wholesale rates from USA manufacturer, high performance.
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Fast & Free Shipping
24-hour shipping, free on $100+ orders.
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Expert Guidance
Team assists in picking ideal burr for materials.
Ready for Order
Don’t let imprecise drill bits slow your workflow. Get your Carbide Jobber Drills now and experience the difference in accuracy and durability. Order today and keep your projects on track with Burrs4Less quality!
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