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Tungsten carbide tapered ball nose end mill, coated finish, 50mm length

YINGHUA

YINGHUA Tapered Ball Nose End Mill R0.25x20.5xD4x50L

SKU CH-CFZX-R3T7V

A tungsten-carbide coated tapered ball-nose cutter for CNC milling with a 0.25 mm radius, 20.5 mm flute length and 50 mm overall length

  • Product typeRight-Angle Drills
  • Precise 3D contouring with R0.25mm ball nose radius
  • Extended reach in deep cavities from 20.5mm cutting length
  • Hard-material durability through tungsten solid carbide construction
  • Industrial CNC milling readiness with coated tapered cone geometry

Precision Tapered Ball Nose End Mill

This solid-carbide cutter features a 0.25 mm radius ball nose and a 20.5 mm cutting length on a 4 mm shank, giving CNC operators a fine-detail tool for 3D contouring and engraving. The tungsten-steel substrate and wear-resistant coating maintain edge sharpness in abrasive composites, non-ferrous metals and hardened steels. It is intended for industrial milling machines, not hand-held drills or hobbyist rotary tools.

Upgrade from generic uncoated carbide

Shops replacing uncoated or larger-radius cutters gain longer tool life and cleaner surface finishes on intricate profiles, reducing secondary polishing. The jump is worth it when cycle time and feature resolution matter more than bulk material removal, while users needing roughing capacity or diameters above 4 mm should select a different geometry.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 83% of the 2,412 comparable items (median $81.99).

Specifications

Product
Product typeRight-Angle Drills

Questions about this item

What shank diameter fits the R0.25x20.5xD4x50L end mill?

The cutter has a 4 mm shank, so use a 4 mm collet or chuck for a secure fit.

How do you install the coated carbide end mill without damaging the tip?

Insert the shank fully into the collet, tighten evenly, and avoid side loads on the 0.25 mm radius ball nose during the first plunge.

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