Standard Carbide Jobber Drill 4.39mm
Product Overview
Meet the Carbide Jobber Drills, precision-engineered to handle your metalworking needs with steady reliability. Whether you’re drilling into tough metals or need accurate holes every time, these drills are tailored for pro results.
Ideal for machinists, fabricators, and metalworking pros who demand sharp, durable tools that hold up job after job. Featuring a 2 flute design with a sharp 118-degree split point, they make drilling smooth and chip-free.
With a crisp 20-degree helix angle and tight tolerance, these jobber drills deliver excellent accuracy and fast chip removal. If you’re aiming for efficiency and precision in every hole, these drills are a smart pick.
Key Features
- 2 flute design promotes efficient chip clearing and clean cuts
- 20-degree helix angle balances cutting speed and tool life
- 118-degree four-facet split point ensures precise hole starts and reduces walking
- Available in standard cut and double cut options for versatility
- Tolerance of +.000/-.0005 guarantees accuracy for tight jobs
- Flute length of 1-5/8" suitable for deep drilling applications
- Overall length of 2-3/4" offers good reach without sacrificing rigidity
- Compatible with a variety of metals and alloys
- Carbide material delivers superior wear resistance and longer tool life
Specifications
- Shape / Type: Standard Jobber Drill
- Cut Type: Standard Cut / Double Cut
- Tool Size: 17 Metric (4.39 mm / 0.1730")
- Flute Length: 1-5/8"
- Overall Length: 2-3/4"
- Flutes: 2
- Helix Angle: 20 degrees
- Point Angle: 118 degrees, four-facet split point
- Tolerance: Diameter +.000 / -.0005
- Brand / Manufacturer: Burrs4Less (USA Supplier)
- Made In: USA
- SKU / Part Number: 30442
Durability and Performance You Can Count On
When you invest in carbide jobber drills like these, you’re not just buying a tool — you’re buying peace of mind for your projects. Their wear-resistant carbide material significantly cuts down on breakage and dulling, which means less downtime changing bits or struggling with incomplete holes. Over weeks and months, that translates to better productivity, fewer interruptions, and more consistent output quality. You’ll find these drills stand up to daily demands, whether it’s a high-volume production line or specialized custom work.
Trusted Quality from Burrs4Less: A Legacy of Precision
Burrs4Less has built a reputation for supplying professional-grade cutting tools that meet strict standards without inflated costs. Our carbide jobber drills are designed with feedback from real-world users, constantly refined to bring innovative features like the four-facet split point and optimal helix angle. This commitment to quality not only enhances your machining accuracy but also helps maintain compliance with industry tolerances. Plus, sourcing locally supports American manufacturing, which we’re proud to stand behind every day.
Case Study: Real Business, Real Results
Dallas, Texas - Upgraded to carbide jobber drills for better precision in automotive parts manufacturing.
"Switching to these carbide jobber drills cut our rework time in half and improved hole accuracy dramatically. We’re hitting tight tolerances every shift now."
Jessica Martinez – Production Supervisor
Increased throughput by 35% while reducing scrap material.
How the Four-Facet Split Point Makes Drilling Smoother and More Accurate
The unique four-facet split point design on these drills helps them bite into the material with less force and reduces walking, which is when the drill slides before it starts cutting. Think of it like the difference between trying to stab a pencil into a surface bluntly versus a pencil with a sharp, multi-sided tip that digs in right away. This design lets you start holes exactly where you want, making your work cleaner and saving time by reducing setup and corrections. If you’ve noticed drills wandering or uneven hole edges in the past, the split point helps solve that problem by giving more control and precision from the get-go.
Installation and Maintenance Guide
Setting It Up
- Match the drill diameter to your project requirements for a proper fit.
- Secure the drill firmly in a compatible chuck or collet to avoid wobble.
- Check that your machine speed settings align with carbide drill speed recommendations to avoid overheating.
- Use cutting fluid or lubricant to improve drill life and hole quality.
- Ensure the drill is aligned perpendicular to the material surface before starting.
Keeping It Going
- Regularly inspect drill edges for chipping or dullness; replace when performance drops.
- Clean chips and debris from flutes after each use to prevent clogging.
- Store drills in protective cases to avoid physical damage.
- Avoid hammering or side loads to prevent bending or breaking the drill.
- Periodically verify drill accuracy with a micrometer or caliper.
Frequently Asked Questions
Q: What materials can these carbide jobber drills be used on?
They’re ideal for drilling into a variety of metals including stainless steel, aluminum, and cast iron.
Q: What is the difference between standard cut and double cut drills?
Standard cut has fewer cutting edges for softer materials, while double cut provides additional edges to handle harder metals more efficiently.
Q: What is the significance of the split point angle?
The split point helps the drill start holes cleaner without wandering, improving accuracy and finish.
Q: Can I use these drills in a handheld drill?
They are best suited for drill presses or CNC machines where consistent speed and pressure can be maintained.
Q: How should I lubricate the drill when machining?
Use cutting oils or fluids recommended for metal drilling to improve life and reduce heat.
Q: What are the dimensions of this jobber drill?
Diameter is 0.1730", flute length is 1-5/8", and overall length is 2-3/4".
Q: How tight are the diameter tolerances?
The diameter tolerance is +.000 / -.0005 inches, ensuring precise hole sizes.
Q: How does the helix angle affect drilling?
The 20-degree helix balances chip clearance and cutting speed for smooth operation.
Q: Are these drills made in the USA?
Yes, these carbide jobber drills are sourced and manufactured with high-quality control in the USA.
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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 wait to upgrade your toolset with premium carbide jobber drills that deliver precision and durability. Order now to experience smoother drilling and improved productivity on your next project.
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