Series 751 4-Flute Ballnose End Mill 9/16"
Product Overview
If you're tackling milling projects that demand precision and versatility, the Series 751 4-Flute Ballnose end mill is an excellent tool to have in your toolkit.
Designed for professionals working with a range of materials like low to medium carbon steels, cast iron, and even plastics, this cutter offers great control and smooth finishes.
Thanks to its thicker core and fine chip control, you’ll experience less tool deflection keeping your dimensions true—making it a reliable choice for general milling, contouring, and slotting tasks.
Key Features
- 4-flute design for excellent surface finish and chip evacuation
- Ballnose shape ideal for contour and profile milling
- Head Diameter: 9/16 inch offering good strength and control
- Length of Cut: 1-1/4 inches for extended machining reach
- Overall Length: 3-1/2 inches allowing versatile depth cuts
- Increased core thickness reduces tool deflection for better accuracy
- Suitable for a wide range of materials including steels, cast iron, stainless steel, composites, plastics, and graphite
- Thin chip load improves finish quality
- Precision manufactured for consistent performance
- Long-lasting carbide construction ensures durability
Specifications
- Shape / Type: Ballnose End Mill
- Cut Type: 4-Flute
- Head Diameter: 9/16 inch
- Length of Cut: 1-1/4 inches
- Overall Length (OAL): 3-1/2 inches
- Material Compatibility: Low to medium carbon steels, cast iron, easy to machine stainless steels, composites, plastics, graphite
- Brand / Manufacturer: Series 751
- Made In: USA
- SKU / Part Number: 121-38237-04
Trusted Precision with Series 751 4-Flute Ballnose End Mills
Beyond the clear-cut specs, the Series 751 end mill delivers real-world reliability that professionals count on. Its solid carbide build and precise manufacturing ensure longer tool life, reducing frequent changes and downtime—major wins for shop productivity and budget. Burrs4Less has a strong reputation for delivering tools crafted to exacting standards, meaning this tool isn’t just designed to perform but to keep giving consistent results job after job.
Efficiency is another key benefit here. Using this 4-flute ballnose can help lower overall operating costs by improving finish quality on the first pass, cutting down on extra polishing and cleanup. It’s also engineered with environmental responsibility in mind—longer intervals between replacements mean less waste, and better chip evacuation helps maintain cleaner workspaces. Whether you’re tackling a complex stainless steel part or shaping composites, this tool offers a well-rounded combination of innovation and durability that's tough to beat.
Case Study: Real Business, Real Results
Located in Cleveland, Ohio, Precision Fabricators upgraded their milling tools to improve job turnaround times.
"Switching to the Series 751 4-Flute Ballnose end mill allowed us to maintain tighter tolerances and finish surfaces smoother, cutting down our rework massively."
Maria Thompson – Lead Machinist
Increased output by 35% and drastically reduced scrap rate.
Why the 4-Flute Design Makes Your Milling Smoother and More Precise
The beauty of a 4-flute cutting edge is in its balance—more cutting edges mean the tool can take smaller bites, which reduces the load on each flute. Imagine slicing a loaf of bread: using a finer serrated knife that slices gently results in cleaner cuts without crumbling the bread. That’s similar to how the 4-flute works—smaller chip loads mean you get a much smoother finish and less chance of the tool wandering from your intended cut path, so your parts come out just right every time.
Installation and Maintenance Guide
Setting It Up
- Ensure your machine spindle is clean before mounting the end mill.
- Insert the shank fully into the collet or holder for maximum rigidity.
- Tighten the tool holder securely to prevent chatter during operation.
- Set your speed and feed rates appropriate for the material you’re machining.
- Use coolant or air blast to help clear chips and prolong tool life.
Keeping It Going
- Regularly inspect the cutting edges for wear or dullness.
- Clean the tool after use to remove built-up material or debris.
- Store the end mill in a protective case to avoid damage.
- Avoid excessive feed rates which can cause premature tool wear.
- Replace the tool when you notice reduced finish quality or dimensional accuracy.
Frequently Asked Questions
Q: What materials can I machine with the Series 751 4-Flute Ballnose?
This end mill is great for low to medium carbon steels, cast iron, easy to machine stainless steels, composites, plastics, and graphite.
Q: Why choose a 4-flute end mill over a 2 or 3-flute one?
4-flute end mills offer better surface finish and less deflection due to increased core thickness, making them ideal for precise milling tasks.
Q: What is the purpose of the ballnose shape?
The ballnose design is excellent for contouring and profiling as it allows smooth curved surfaces and better tool life during 3D machining.
Q: How long is the cutting length on this end mill?
The Series 751 offers a cutting length of 1-1/4 inches, suitable for medium-depth milling operations.
Q: Can this tool handle stainless steel?
Yes, it works well with easy-to-machine stainless steels, but for tougher grades, consider specific coatings or tooling.
Q: What is the shank diameter?
The shank diameter is 9/16 inch, matching common collets and holders used in milling machines.
Q: Is coolant required when using this end mill?
It’s recommended to use coolant or air blast to extend tool life and improve finish when machining tougher materials.
Q: Does the increased core thickness affect cutting speed?
While it may reduce maximum chip load, this results in better accuracy and a finer surface finish.
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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 milling performance! The Series 751 4-Flute Ballnose end mill is ready to deliver precision and reliability the moment it hits your machine. Order today and see the difference quality tooling makes to your projects.
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