Ball Nose End Mill – 3 & 4 Flute Solid Carbide

3 & 4 Flute Solid Carbide Ball Nose End Mill

Precision ball nose end mills for CNC contouring, mold and die work, 3D profiling, semi-finishing and finishing. Choose the radius, flute configuration and tool length according to the workpiece, surface requirement and reach needed.

Quick Selection Guide

Radius: select from R0.5–R10 according to the required surface geometry.
Flute count: choose the available 3-flute or 4-flute option that matches your machining requirement.
Tool length: use the shortest length that safely reaches the feature for better rigidity.
Application: suitable for 3D contouring, cavity finishing and profile milling.

Variant Naming

R indicates ball radius. For example, R2 is a 2mm radius ball nose with a 4mm cutting diameter. Confirm radius, tool length and the selected variant before ordering.

BB Ball Nose End Mill – 3 & 4 Flute Solid Carbide (BF2055 / BB2055)

Precision-ground solid carbide ball nose end mills optimized for semi-finishing and finishing of complex 3D contours and mold cavities. Choose between 3-flute and 4-flute geometry based on your workpiece material.

Which Series Should I Choose?

Series	Flutes	Best For	Advantage
BF2055	3 Flute	Aluminum, non-ferrous metals	Larger chip clearance, prevents built-up edge, excellent surface finish on Al
BB2055	4 Flute	Steel, stainless steel, hardened steel	Higher rigidity, better surface finish on ferrous materials
BK2055 (Black Nano)	4 Flute	Hardened steel, wear-intensive finishing, abrasive materials	Higher hardness and better wear resistance — black nano-composite coating extends tool life

BK2055 (Black Nano) — Higher Hardness, Longer Tool Life

BK2055 adds a black nano-composite coating on an ultra-fine grain carbide substrate. Compared with standard coated ball nose grades it offers higher hardness and noticeably better wear resistance, so the cutting edge stays sharp longer — the right choice for hardened steels and abrasive materials where tool life and surface consistency matter most.

Key Features

Material: Ultra-fine grain solid carbide
Coating: TiAlN / AlTiN (high heat & wear resistance)
Radius range: R0.5 – R10 mm (diameter Ø1 – Ø20 mm)
Neck lengths: 50 / 60 / 75 / 100 / 150 mm
Application: Finishing & semi-finishing of 3D profiles, die & mold, contour milling

Specification Guide

Naming convention: R[radius]x[neck length] — e.g., R2x50 = radius 2 mm (Ø4 mm), neck length 50 mm

Radius (R)	Diameter (D)	Available Neck Lengths
R0.5	Ø1 mm	50, 75 mm
R0.75	Ø1.5 mm	50 mm
R1	Ø2 mm	50, 75 mm
R1.25	Ø2.5 mm	50 mm
R1.5	Ø3 mm	50 mm
R1.75	Ø3.5 mm	50 mm
R2	Ø4 mm	50, 75, 100 mm
R2.25	Ø4.5 mm	50 mm
R2.5	Ø5 mm	50, 75, 100 mm
R3	Ø6 mm	50, 75, 100, 150 mm
R4	Ø8 mm	60, 75, 100, 150 mm
R5	Ø10 mm	75, 100, 150 mm
R6	Ø12 mm	75, 100, 150 mm
R7	Ø14 mm	100 mm
R8	Ø16 mm	100, 150 mm
R9	Ø18 mm	100 mm
R10	Ø20 mm	100 mm