Carbide HRC55 Micro Ball Nose End Mill for Hardened Mold Steel | BOFA Manufacturer

SERIES OVERVIEW

Carbide HRC55 Micro Ball Nose End Mill for Hardened Mold Steel

Micro-size solid carbide ball nose end mills for fine milling, profiling and detailed mould machining. The 2-flute design supports side milling and face milling, while the precision-ground cutting edge is designed for a clean finish.

Series Overview

Application and process data

Cutting values are setup-dependent. Use the fields below to request a condition card rather than applying a generic speed or feed.

RFQ technical fields

Include: series, ball radius R, cutting length H, shank C, overall length L, material and hardness, operation, rpm or cutting speed, feed units, ap/ae, coolant, spindle/holder interface, runout or tolerance target, quantity, delivery date, and a drawing or workpiece photo.

Carbide grade, geometry and interface

Publish only values confirmed by the BOFA series datasheet or quotation. The fields below make the decision variables machine-readable without inventing unverified cutting data.

Frequently asked questions

Does this tool use an insert?

No. The HRC55 micro ball nose is a solid-carbide, 2-flute end mill. There is no replaceable insert or insert-grade matching step.

Can cutting length H be used as the maximum machining depth?

No. H is a geometry reference, not an automatic safe depth. Overhang, holder runout, workpiece hardness, radial engagement and toolpath load must be checked before setting axial depth.

Which materials is the HRC55 micro ball nose end mill intended for?

The published application is fine milling and mould/profile work. Send the exact workpiece grade—such as mould steel, carbon/alloy steel, stainless steel, cast iron or aluminium—and its measured hardness so BOFA can confirm the tool and cutting condition.

Does HRC55 mean the workpiece can always be cut at 55 HRC?

No. HRC55 is the BOFA series designation, not a universal workpiece limit. The allowable hardness depends on the material, heat treatment, tool diameter, overhang and operation; request a condition card for the selected model.

What carbide grade, grain size, cobalt content and coating are supplied?

The current size chart does not publish a grade code, grain-size value, cobalt percentage or coating family. These are batch/series data and must be confirmed on the BOFA datasheet or quotation before ordering; no unverified value is assumed here.

How are spindle speed, feed and depth of cut selected?

They are condition-card values, not one generic table. Provide material and hardness, ball radius, tool diameter, overhang, holder, operation, coolant, target surface finish and current rpm/feed units; BOFA will return recommended rpm, feed per tooth, table feed, ap and ae.

Which machine interface and holder should I use?

The listed solid-carbide shanks are C=D4, D6, D8, D10 and D12 mm. State the spindle taper, holder type and gauge length; use a rigid precision holder and provide the runout target so compatibility can be checked.

How do I choose the ball radius and overall length?

Choose a radius no larger than the smallest concave feature that must be finished, then choose H, C and L for the required reach with the shortest safe overhang. Use the linked size-row RFQ to send the exact R×H×C×L×2F model.

Full Size Range

PRODUCT DETAILS

Images, configurations and size charts.