BB2055 BB2063 Carbide End Mill 2F 4F | Solid Carbide CNC Milling Cutter

BB® Tungsten Steel Solid Carbide End Mills

Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid tool-holding systems.

Dimensions & Tolerances

Tolerance of End Mill Diameter:

• 1 < D ≤ 6 mm: -0.010 ~ -0.030
• 6 < D ≤ 10 mm: -0.015 ~ -0.040
• 10 < D ≤ 20 mm: -0.020 ~ -0.050

Industrial Design

Negative front angle and large chip space for easier roughing and finishing. Reduces tool changes and saves production time.

Helix Angle: 35°, high adaptability to workpiece material and hardness. Widely used in mold and product processing.

Coating

High-performance coating improves tool life, production efficiency, and cutting performance.

Application

Suitable for: Milling machines, CNC machining centers, drill presses, engraving machines. Materials: metal, wood, alloy steel, stainless steel, and more.

• 2 Flutes: Slotting, sinking, soft materials
• 3 Flutes: Aluminum, non-ferrous metals
• 4 Flutes: High rigidity, shallow slot, profile milling, finish machining

Series Specifications

BB® BB2055 -Basic

• Color: Copper
• Density: 14.5 g/cm³
• Hardness: HRA 91.5
• Grain Size: 0.7-0.6 μm grain size
• Bending Strength: 3000 N/mm²
• Raw Material: ZK30UF with 10% Co content
• Coating: TiSiN — high surface hardness, good wear resistance
• Suitable for: General steel (≤HRC 45), stainless steel, hardened steel

BB® BL2060 Carbide End Mills

• Color: Blue
• Density: 14.5 g/cm³
• Hardness: HRA 93
• Grain Size: 0.4 μm
• Bending Strength: 4000 N/mm²
• Raw Material: GU25UF with 12% Co content, 0.4 μm grain size
• Coating: AlTiSiN — hardness up to 4000 HV, thermal stability up to 1200°C
• Suitable for: Stainless steel, hardened steel, titanium alloy (HRC < 55)

BB® BB2063 Series

• Geometry: 35°
• Grain Size: 0.3-0.2 μm
• For high hardness materials: HRC 48–62

• Upgraded TiSiN Composite Coating: Offers higher hardness (>HV 3500), better oxidation resistance, and superior thermal stability compared to standard TiSiN, maintaining edge integrity under high-speed and high-temperature cutting conditions.

• Ultra-fine Grain Carbide Substrate: Provides excellent bending strength and chipping resistance, ensuring reliability in hard material machining.

• Optimized Geometry: Reinforced cutting edges and a large core design reduce vibration and deflection, tailored for materials up to HRC 60.

• • Hardened steels (HRC 45~60)

  • Mold steels (e.g., P20, 718, H13)

  • Stainless steels (304, 316, etc.)

  • High-temperature alloys (e.g., Inconel, Titanium)

Cutting Parameters

• ap = 1/3D (range: 1/8–1/2D)
• ae = 1/2D (range: 1/4–1D)
• fz = 0.15 mm (range: 0.02–0.2 mm)

Adjust parameters according to workpiece material and hardness.

Application Case

Customer: Russia | Machining Expert: A. Golubtsov

Challenge: Finishing copper with a Ø1.5mm 4-flute micro end mill. Slot depth 3mm, tolerance ±0.3mm. Tool deflection during finishing caused oversized slots.

Solution: Used BB Tools 1.5mm coated 4-flute end mill with step-finishing strategy (roughing + 0.1–0.2mm light finishing pass) to eliminate deflection and ensure dimensional stability.

Key Parameters:

• Speed: 8000 RPM / Feed: 400 mm/min
• Radial engagement: 0.65mm (rough) / 0.1–0.2mm (finish)
• Overhang: 25–30mm / Coolant: Emulsion directly on tool

Customer Feedback: "BB Tools 1.5mm end mills are reliable. With the right strategy, they solve deflection issues in copper micro-machining."

Quality Control

From raw materials to finished products, every BB tool undergoes strict inspection to ensure consistent and stable quality.

Shipping & Orders

• Orders dispatched within 3 business days after payment confirmation
• Buy 10+ pieces: additional 5–10% discount
• Express shipping available for urgent orders
• Contact us if your shipment has not arrived within 60 days