Long Neck Corner Radius End Mills

Long Neck Corner Radius End Mill Specifications

A long neck corner radius end mill combines a defined corner radius with an extended neck section for machining features that require additional reach and clearance.

The catalog includes multiple combinations of cutting diameter, radio de esquina, longitud de la flauta, effective length and neck diameter. Use the ranges below for initial selection rather than treating every dimension as freely interchangeable.

R0.1, R0.2 and R0.5 mm are discrete catalog radius options. Available cutting diameter, radio, L1, L2 and neck-diameter combinations depend on the selected catalog series and tool size.

For other extended-reach end geometries, ver Long Reach End Mills

For the broader small-diameter product range, ver Microfresas.

Long Neck Clearance and Corner Radius Geometry

Radio de esquina / Bull Nose Cutting Geometry

Corner-radius geometry keeps a flat-ended cutting profile while adding a defined radius between the end and side cutting edges.

In this product group, bull nose is a related name for the same general corner-radius geometry. The actual radius and tool dimensions should still be checked when selecting a specific model.

The confirmed standard radius options for this series are:

R0.1 / R0.2 / R0.5 mm

For general corner-radius or bull-nose milling where additional neck clearance is not required, ver Molino de punta de toro.

Long Neck Clearance for Restricted Features

The extended neck creates additional clearance between the cutting section and the larger shank area. This helps the tool reach recessed features where surrounding walls, shoulders or other workpiece geometry could interfere with a standard-reach tool.

Long neck and long reach are closely related market terms, but the product name alone should not determine tool selection. Check the cutting diameter, effective length and neck diameter against the actual feature geometry.

Where a selected catalog model has a neck diameter smaller than its cutting diameter, the smaller neck section provides additional clearance. This relationship should be confirmed for the selected size rather than assumed across the entire series.

Diámetro de corte, Corner Radius and Effective Length Selection

Cutting Diameter and Corner Radius Options

Start with the cutting diameter according to the groove, pocket or feature the cutter must enter. Choose a diameter that fits the required machining area and part geometry.

Then select the corner radius according to the required radiused transition. This catalog series provides three confirmed options:

R0.1 mm / R0.2 mm / R0.5 mm

These are discrete catalog options, not a continuous R0.1–0.5 mm range.

Confirm the cutting diameter and corner radius together because not every diameter and radius combination is available with every L1, L2 or neck diameter.

If the feature requires square / flat geometry without a corner radius, ver Long Neck Square End Mill.

If the feature requires ball-end geometry instead, ver Long Reach Ball Nose End Mill.

Effective Length and Neck Diameter

Effective Length (L2) becomes important when the cutting area sits deeper inside a groove, cavidad, pocket or other recessed feature.

A longer L2 provides additional access, while the neck diameter determines the available clearance around the tool between the cutting section and surrounding workpiece geometry.

Longitud de la flauta (L1) represents the cutting-edge length and should be checked separately from L2. A longer effective length does not automatically mean a longer cutting edge.

Because cutting diameter, L1, L2 and neck-diameter combinations vary by catalog size, confirm these dimensions together when selecting a tool.

If the required combination does not match a standard catalog size, send a drawing or sketch for review before quotation.

Applications for Long Neck Corner Radius End Mills

Deep Grooves, Cavities and Pockets

Long neck corner radius end mills suit deep or restricted features that require both additional access and corner-radius cutting geometry.

Typical applications can include deep groove milling, fresado de cavidad profunda, fresado de bolsillo profundo, narrow pockets and other restricted-access features where a standard tool body does not provide enough clearance.

The long-neck section allows the cutting end to reach the required machining area while keeping the larger tool body away from surrounding geometry.

Tool selection should follow the actual feature depth, available clearance, cutting diameter and required corner radius rather than simply choosing the longest available configuration.

Flat Bottoms and Radiused Internal Corners

This geometry is useful when the machined feature requires a flat-bottom area together with a radiused transition between the bottom and side wall.

The corner radius distinguishes it from a sharp square-end tool, while the long-neck structure provides additional access for deeper features.

For internal corner-radius machining, confirm both the required radius and available tool clearance against the workpiece geometry before selecting the catalog size.

Long Neck Corner Radius End Mill vs Standard-Reach Bull Nose End Mill

Both tools use corner-radius / bull-nose cutting geometry. The main difference is the reach and clearance available around the tool.

Choose a standard-reach bull nose end mill when the tool body can reach the feature without interference.

Choose a long neck corner radius end mill when the same corner-radius geometry is required deeper inside the workpiece or when additional neck clearance is necessary.

Custom Long Neck Corner Radius End Mills

Standard catalog sizes cover multiple combinations of cutting diameter, radio de esquina, longitud de la flauta, effective length, diámetro del cuello, shank diameter and overall length.

For non-standard long-neck or long-reach corner-radius requirements, send a drawing or sketch showing the required dimensions. We can review the requested configuration before quotation and assess manufacturing feasibility.

Custom sizes and configurations are subject to drawing review and manufacturing feasibility.

Preguntas más frecuentes

Are long neck and long reach corner radius end mills the same?

The terms often describe similar extended-access tool concepts, but naming can vary. Check the cutting diameter, effective length, neck diameter and other dimensions when selecting a specific tool instead of relying only on the product name.

Is a corner radius end mill also called a bull nose end mill?

Bull nose is commonly used for corner-radius end mill geometry. Sin embargo, naming can vary between suppliers, so confirm the actual end geometry and corner radius when selecting a tool.

How do I choose the cutting diameter, corner radius and effective length?

Start with the feature size to determine the cutting diameter. Then select the required corner radius and check Effective Length (L2) against the required reach.

Also confirm the neck diameter against the available side clearance.

When should I choose a long neck corner radius end mill instead of a standard-reach bull nose end mill?

Choose the long-neck version when the feature requires additional reach or neck clearance. If the machining area is normally accessible, a standard-reach bull nose end mill may be sufficient.

Can you manufacture a custom long neck corner radius end mill from a drawing?

We can review non-standard cutting diameter, radio de esquina, longitud de la flauta, effective length, diámetro del cuello, shank diameter and overall length requirements based on your drawing or sketch.

Send Your Long Neck Corner Radius End Mill Inquiry

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