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ProductsSolid Carbide Ball Nose End Mill 2 Flute for Steel | Precision Decimal Sizes R1.05 - R4.5
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Solid Carbide Ball Nose End Mill 2 Flute for Steel | Precision Decimal Sizes R1.05 - R4.5

Machine complex mold contours with our 2-Flute Solid Carbide Ball Nose End Mills for Steel. Featuring hard-to-find decimal radii (e.g., R1.18, R3.175) and high-performance coating for extended tool life. In stock and ready to ship. Factory direct pricing!

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Product Function

Designed for the Mold & Die industry, this 2-Flute Solid Carbide Ball Nose End Mill is the ultimate tool for 3D profiling, contouring, and finishing operations on Carbon Steels, Alloy Steels, and Pre-hardened Steels (up to HRC55).
Why this series is special? Unlike standard catalogs that only offer integer sizes (R1.0, R2.0), this series specializes in High-Precision Decimal Radii (e.g., R1.05, R1.18, R3.175). This eliminates the need for expensive custom tool grinding when you need to machine specific corner radii or compensate for EDM spark gaps.

Product Features

  1. Extensive Decimal Sizes: We stock hard-to-find sizes like R1.15, R1.65, and R3.175 (1/8" Radius), ensuring you have the exact geometry for your CAD model.
  1. Premium Micro-Grain Carbide: Manufactured from ultra-fine tungsten carbide substrate, providing excellent wear resistance and toughness for machining steel.
  1. Advanced Coating: Coated with high-performance AlTiN/TiSiN, enabling high-temperature resistance and dry machining capabilities.
  1. Superior Surface Finish: The 2-flute geometry with a 30° helix angle is optimized for chip evacuation in deep cavities, leaving a smooth, polished surface.
  1. High Tolerance: Radius tolerance is controlled within ±0.01mm, ensuring precise form accuracy for complex molds.

Specifications

Radius (R)
Shank Dia (d)
Length of Cut (L2)
Over All Length (L1)
Flutes
R1.05
4
4.2
50
2
R1.1
4
4.4
50
2
R1.15
4
4.6
50
2
R1.18
4
4.72
50
2
R1.2
4
4.8
50
2
R1.25
4
5
50
2
R1.3
4
5.2
50
2
R1.35
4
5.4
50
2
R1.4
4
5.6
50
2
R1.45
4
5.8
50
2
R1.55
4
6.2
50
2
R1.6
4
6.4
50
2
R1.65
4
6.6
50
2
R1.7
4
6.8
50
2
R1.75
4
7
50
2
R1.8
4
7.2
50
2
R1.85
4
7.4
50
2
R1.9
4
7.6
50
2
R1.95
4
7.8
50
2
R2.1
6
8.4
50
2
R2.2
6
8.8
50
2
R2.25
6
9
50
2
R2.3
6
9.2
50
2
R2.4
6
9.6
50
2
R2.5
6
10
50
2
R2.6
6
10.4
50
2
R2.7
6
10.8
50
2
R2.75
6
11
50
2
R2.8
6
11.2
50
2
R2.9
6
11.6
50
2
R3.1
8
12.4
60
2
R3.175
8
12.7
60
2
R3.2
8
12.8
60
2
R3.25
8
13
60
2
R3.3
8
13.2
60
2
R3.4
8
13.6
60
2
R3.5
8
14
60
2
R3.6
8
14.4
60
2
R3.7
8
14.8
60
2
R3.75
8
15
60
2
R3.8
8
15.2
60
2
R3.9
8
15.6
60
2
R4.5
10
18
75
2

RPM/Feed Reference Table (For Steel HRC45-55)

Note: These parameters are for finishing operations (small depth of cut). Please adjust based on your machine rigidity and specific steel grade.
Radius (R)
RPM (min⁻¹)
Feed Rate (mm/min)
Feed per Tooth (fz)
R1.0 - R1.5
15,000 - 22,000
600 - 1200
0.02 - 0.03
R1.5 - R2.5
10,000 - 16,000
800 - 1500
0.03 - 0.05
R2.5 - R3.9
8,000 - 12,000
1000 - 1800
0.04 - 0.07
R4.5
6,000 - 9,000
1200 - 2000
0.05 - 0.08

Promotion Policy

We support our partners with flexible policies to lower your trial cost:
  1. Free Sample: We are confident in our quality. A Free Sample can be provided for testing (clients only need to cover the shipping cost).
  1. First Order Coupon: New clients can enjoy a **USD
    50DiscountCoupon∗∗fortheirfirstorder,providedthetotalorderamountexceedsUSD50 Discount Coupon** for their first order, provided the total order amount exceeds USD
    
    500.
  1. Big Order Discount: For bulk purchases, clients can enjoy a 2% ~ 5% Discount if the total order amount exceeds USD $5000.

Clients Benefits

  • Save Time: No need to wait 2 weeks for custom tool grinding. We have these specific decimal sizes in stock.
  • Reduce Polishing: The high-precision ball nose geometry reduces manual polishing work on molds.
  • Cost Efficiency: Factory-direct pricing allows you to reduce your tooling cost by 30% compared to major brands.

FAQ

Q: What is the hardness rating for these end mills? A: These are designed for steels up to HRC55. For harder materials (HRC60-65), please check our "Blue Series" or "High Hardness Series".
Q: Is R3.175 the same as 1/8 inch radius? A: Yes, R3.175mm is exactly equivalent to a 1/8" radius, making it perfect for projects using Imperial measurements.
Q: Can I use these for roughing? A: While they can handle light roughing, 2-flute ball nose mills are best optimized for finishing and semi-finishing (profiling) to maintain the best surface quality and tool life.
Q: Do you ship internationally? A: Yes, we ship globally via DHL/FedEx/UPS. Shipping usually takes 3-7 days depending on your location.