Description
Product Overview
This carbide square end mill is designed for side milling,
shoulder machining, flat-surface finishing and medium-to-fine
machining of hardened mold, die and tool steels in the
HRC60–68 hardness range.
It combines a 0.4 μm ultra-fine carbide substrate, 9% cobalt
content, DR3 bronze high-wear-resistant coating, a 68% reinforced
core and a 45° helix design to improve cutter rigidity, wear
resistance and machining stability.
Recommended Machining Applications
The square cutting profile, reinforced core and 45° helix are
designed mainly for stable side machining and controlled finishing
of high-hardness steel components.
Side Semi-Finishing
Suitable for controlled material removal from hardened
steel walls and peripheral surfaces before final finishing.
Side Finishing
Designed for stable finishing of straight walls,
external profiles and hardened mold surfaces.
Shoulder Machining
Supports machining of shoulders requiring controlled
wall geometry and a flat-bottom cutting profile.
Flat-Surface Finishing
Suitable for planar mold features, pocket bottoms
and flat hardened steel surfaces.
Square End Mill Geometry and Cutting Performance
The substrate, coating, reinforced geometry and controlled edge
preparation work together to improve wear resistance and cutting
stability in demanding hardened steel applications.
0.4 μm Ultra-Fine Carbide
The ultra-fine carbide substrate has an approximate grain
size of 0.4 μm, supporting high hardness, wear resistance
and consistent cutting-edge geometry.
9% Cobalt Content
A 9% cobalt content balances substrate hardness,
edge strength and resistance to fracture during
high-hardness steel machining.
DR3 Bronze Coating
The DR3 bronze high-wear-resistant coating helps resist
heat and abrasive wear at cutting temperatures up to
approximately 1300°C.
68% Reinforced Core
The large 68% core diameter increases cutter rigidity
and helps reduce tool deflection and vibration under
high cutting pressure.
0° to −5° Peripheral Rake
The controlled negative peripheral rake strengthens
the cutting edge and helps reduce premature chipping
during hardened steel machining.
45° Helix Design
The 45° helix supports smoother engagement and stable
cutting during side milling, shoulder machining and
medium-to-fine finishing.
Flat-Bottom Cutting Profile
The square-end profile is suitable for flat-bottom
pockets, shoulders, planar features and defined
wall-to-bottom transitions.
Automated Edge Honing
Automated rubber-bonded diamond polishing helps maintain
consistent preparation across all cutting edges, with
the honing value controlled within ±3 μm.
Walter Five-Axis Grinding
Walter five-axis precision grinding supports cutting-edge
sharpness, dimensional accuracy and repeatable tool geometry
for smoother hardened steel machining.
HRC60–68 Finishing Range
The tool is intended mainly for controlled semi-finishing
and finishing of hardened mold, die and tool steels within
the HRC60–68 range.
Standard Square End Mill Sizes
Standard metric sizes, long-reach tools and customized dimensions
are available for hardened steel machining, wholesale supply and OEM orders.
| Tool Diameter | Standard Metric Sizes / Custom Diameter |
|---|---|
| Flute Length | Standard / Long Reach / Custom |
| Shank Diameter | Standard Shank / Custom Shank |
| Overall Length | Standard / Extended Length / Custom |
| Flute Number | 4 Flutes / Custom |
Send us the required diameter, flute length, shank diameter,
overall length, workpiece hardness and order quantity to receive
the current size list and wholesale quotation.
Available Configurations
Standard and customized square end mills can be supplied according
to the actual hardness, machining feature, tool overhang and purchasing
requirements.
| Tool Type | Carbide Square End Mill |
|---|---|
| Flute Number | 4 Flutes / Custom |
| Carbide Grain Size | Approximately 0.4 μm |
| Cobalt Content | 9% |
| Coating | DR3 Bronze High-Wear-Resistant Coating |
| Temperature Resistance | Up to Approximately 1300°C |
| Core Diameter | 68% Reinforced Core Design |
| Peripheral Rake | 0° to −5° |
| Helix Angle | 45° |
| Edge Preparation | Automated Diamond Polishing, Controlled Within ±3 μm |
| Hardness Range | Recommended for HRC60–68 Hardened Steel |
| Diameter and Length | Standard Sizes / Long Reach / Custom Dimensions |
| Marking | ZHY Logo / Customer Logo / Customer Model Number |
| Packaging | Standard Packaging / Private-Label Packaging |
Recommended Workpiece Materials
Tool selection should be based on the actual heat-treatment
condition and measured hardness of the workpiece. This product
is mainly recommended for HRC60–68 applications.
Wholesale and OEM Support
ZHY supplies standard and customized carbide square end mills
for distributors, importers, mold manufacturers, CNC workshops
and private-label cutting-tool brands.
Wholesale Order Support
- Standard and mixed-size orders
- 4-flute and customized configurations
- Samples for hardened steel machining tests
- Bulk quotations based on size and quantity
- Long-reach and custom dimensions
- Application review based on actual HRC hardness
OEM and Private Label
- Customer logo laser marking
- Customer product and model numbers
- Custom labels and barcode stickers
- Plastic box and outer carton options
- Private-label packaging support
- Packaging verification before shipment
Production and Batch Quality Control
Precision grinding, controlled edge honing and geometry inspection
support consistent square-end geometry and repeatable batch delivery.
Request a Hardened Steel Square End Mill Quotation
Send us the required diameter, flute length, overall length,
workpiece grade, actual HRC hardness, machining feature,
quantity and packaging requirements. Our team will review
the application and provide a suitable wholesale quotation.
