2FxR0.4x4x50L Solid Carbide Ball Nose End Mill for CNC Metal

2FxR0.4x4x50L Solid Carbide Ball Nose End Mill is a precision two-flute ball nose cutter for 3D contouring, mold machining, curved-surface finishing and metal profile milling.

Solid Carbide Ball Nose End Mill Features

Solid carbide construction for rigidity and wear resistance.
Precision-ground ball nose geometry for curved and three-dimensional surfaces.
Two-flute design supports chip evacuation and controlled finishing.
Suitable for CNC machining with correctly selected cutting parameters.
Standard and customized cutting-tool specifications are available.

Applications and Usage

This 2FxR0.4x4x50L model is suitable for mold components, curved profiles, detailed contouring and finish milling. Confirm workpiece hardness, machine rigidity, tool runout, cooling and workholding before production.

Use a clean holder that matches the tool shank.
Keep tool overhang as short as practical.
Select spindle speed, feed rate and pass depth for the material.
Maintain effective cooling and chip evacuation.
Replace worn or damaged tools before continued machining.

How a Solid Carbide Ball Nose End Mill Works

A solid carbide ball nose end mill uses a rounded cutting end to machine curved surfaces, fillets, molds and three-dimensional contours. This 2FxR0.4x4x50L configuration has two flutes, a 0.4 mm nose radius, a 4 mm shank and a compact 50 mm overall length. The small radius is suitable for fine detail, but it also requires accurate runout control and conservative engagement.

Applications for Ball Nose Milling

Ball nose tools are commonly used for surface finishing, relief carving, mold cavities, dies, rounded slots and blended transitions. During 3D machining, the effective cutting diameter changes with contact position and step-over. A smaller step-over can improve surface finish but increases machining time. Material grade, hardness and required detail should guide the choice of toolpath and cutting parameters.

Machine Setup and Cutting Guidance

Clean the collet or holder and spindle taper before loading the cutter. Clamp the 4 mm shank securely and keep overhang as short as the workpiece geometry permits. Small-radius ball nose tools are sensitive to runout, vibration and sudden load changes, so verify machine rigidity, workholding, tool length offset and fixture clearance before starting.

Begin with conservative spindle speed, feed per tooth, depth and step-over. Observe chip form, spindle load, sound and the machined surface, then adjust gradually. Use the coolant, air or lubrication method appropriate for the metal and tool specification. Maintain chip evacuation and avoid dwelling at the tool center, where cutting speed approaches zero. Test a new alloy or toolpath on spare material before production.

Buyer Selection Checklist

Confirm flute count, nose radius, cutting diameter, shank diameter, flute length, overall length and coating before ordering. Buyers should also state the workpiece metal, hardness, maximum depth, machine type, holder and desired surface finish. For complex cavities or fine relief work, share a drawing or toolpath detail so the radius and reach can be reviewed.

JEEFOO manufactures CNC milling tools in Guangzhou, China, supporting machine shops, mold makers, distributors and OEM customers. Application support can include dimensional review, coating selection, packaging and customized cutter development. Browse related tools in the CNC end mills collection. General manufacturing resources are available from SME.

Inspect the solid carbide ball nose end mill before and after machining. Replace it if the cutting edge is chipped, bent or heavily worn. Follow machine guarding and coolant procedures. For a quotation, provide the 2FxR0.4x4x50L specification, quantity, workpiece material and operation. Accurate data helps JEEFOO recommend a suitable standard or customized tool and gives search engines and AI answer systems reliable product context.