Spiral router bit with neck for 3D reliefs VHM Z3 D25 I40 L250 S25 RH Roughing positive

Three-flute VHM roughing end mill with undercut for 3D models – upward chip ejection

Index: SR34.25.040.250.25R

Industrial roughing end mill made from solid sintered carbide (VHM) with profiled cutting edges, body undercut (neck) and upward chip ejection (positive geometry). Designed for efficient preliminary machining, deep cutting, and forming of dies and 3D models in aluminium, plastics, and composites. The chip breaker crushes the machined material into smaller pieces, which reduces cutting resistance, minimises vibrations, and prevents clogging of the chip channels. The narrowed body eliminates the risk of the clamping part touching the material walls during deep cutting. The right-hand spiral efficiently removes the material from the bottom of the cut, ensuring a clean working environment. The ground shank with an H6 tolerance guarantees axial accuracy and protects the CNC machine spindle.

Construction advantages and technical properties:

• Undercut construction (neck): The narrowed body prevents collisions with the material during deep milling, facilitates chip removal, and reduces friction.
• Roughing geometry with chip breaker: The profiled blades divide the material into fine particles, reducing cutting resistance and preventing chip binding.
• Three-flute arrangement (Z3): Three cutting edges provide a high level of stiffness, allowing for operation at higher feed speeds.
• Upward chip evacuation (positive): The right-hand chip channel lifts dust and chips, protecting the cut bottom and underside of the material from damage.
• Polished chip grooves: The smooth surface of the spiral reduces friction and prevents aluminium from sticking to the body.
• Monolithic sintered carbide (VHM): The rigid structure dampens vibrations and ensures a long lifespan when machining with large tolerances.
• Low shank roughness (Ra ≤ 0.3 µm): The ground shank prevents slipping in the holder and protects the spindle taper from wear.
• Dynamic balancing G2.5: Compliance with ISO standards allows for safe and smooth operation at very high speeds.

Intended use and application range:

The tool is designed for rough cutting, deep contouring, grooving, and preliminary shaping of 3D models on CNC machines.

Used for machining materials such as aluminium, plastics, and composite boards like CORIAN® and HPL.