LU General-Purpose End Mill | PCH Coated, Unequal Flute Spacing, φ1-20mm-Win Win Industrial Co., Ltd

Highlights

Key Advantages

PCH coating at Hv2800—the metallic gray layer stays put on steel, stainless, cast iron, and aluminum, so you get consistent wear resistance without changing tools between jobs.
Unequal flute spacing and helix angles are staggered to break the cutting rhythm—this is what kills chatter and edge chipping, especially on thin walls or long-reach cuts.
One tool for roughing and finishing. The staggered geometry keeps the cut stable from heavy stock removal right down to the final pass, so you skip the tool change.
Covers steel up to 45HRC, stainless (SUS303/SUS304) to 35HRC, plus cast iron, aluminum, titanium, copper, graphite, and resin—a practical range for job shops handling mixed materials.
Square, corner radius, and ball nose types from φ1–20mm, standard and long reach, with 146 total specs including 9 corner-protection types—you can match the exact reach and profile your part needs.

Use Cases

Applications

Mold and die work—the unequal flute spacing keeps tool marks off cavity walls and reduces hand polishing on deep ribs.
Medical device machining—stable cutting on stainless and titanium without chatter marks on small features.
Automotive parts—roughing and finishing in one pass on steel and cast iron components, cutting cycle time on mixed-material batches.
New energy components—aluminum and copper alloy parts where edge chipping on thin sections is a common scrap cause.
3C electronics—small-diameter work (φ1–6mm) on aluminum and resin housings where vibration ruins surface finish.
Aerospace and construction machinery—long-reach cuts on high-hardness steel up to 65HRC where tool deflection and chatter are the usual failure points.

Specs

Technical Specifications

Series Name	LU
Composition Code	PCH
Coating Color	Metallic Gray
Surface Hardness	Hv 2800
Vaporization Start Temperature	1100 ℃
Standard Film Thickness	2~3 μm
Friction Coefficient	μ 0.25~0.35
Applicable Workpiece Materials	Ordinary Steel (≤45HRC), Non-ferrous Materials (Aluminum, Copper), Cast Iron
Square End Type Range	φ1~20mm \| Standard / Long Reach, 45 specifications (including 9 corner-protection types)
Corner Radius Type Range	φ1~20mm \| Standard / Long Reach, 68 specifications
Ball Nose Type Range	R0.5~R10mm \| Standard / Long Reach, 33 specifications

Details

Detailed Description

"Title: LU General-Purpose End Mill
Slogan: General-purpose series | High quality, high cost-performance, fast delivery
Coating Parameter Table
Item Parameter
Series Name LU
Composition Code PCH
Color Metallic Gray
Surface Hardness Hv 2800
Vaporization Start Temperature 1100 ℃
Standard Film Thickness 2~3 μm
Friction Coefficient μ 0.25~0.35
Applicable Workpiece Materials: Ordinary Steel (≤45HRC), Non-ferrous Materials (Aluminum, Copper), Cast Iron
✅ Machinable Material Details
Ordinary Steel / Alloy Steel (S45C~S55C, SS, SCM) ~40HRC
Quenched and Tempered Steel (PX, NAK, HPM, STAVAX) ~45HRC
High-Hardness Steel (SKD, DAC, DC, SKH): ~55HRC / ~60HRC / ~65HRC
Stainless Steel (SUS303, SUS304) ~35HRC
Cast Iron (FC, FCD), Aluminum Alloy, Titanium Alloy, Copper Alloy, Graphite, Resin
Product Design Features
Special design with unequal flute spacing and unequal helix angles
Unlike the standardized structure of conventional tools with equal flute pitch and uniform helix angle, it breaks the periodic symmetry of cutting, fundamentally improving pain points such as machining vibration, chatter, tool marks, and edge chipping, and is suitable for precision machining of various materials.
✅ Edge chipping protection design, effectively extending tool service life
Machining Scenarios
Stable cutting from roughing to finishing, achieving excellent workpiece surface finish
Applicable Industries
Molds, Medical, Automotive, New Energy, 3C, Aerospace, Construction Machinery
Specification Range
Square End Type: φ1~20mm | Standard / Long Reach, 45 specifications in total (including 9 corner-protection types)
Corner Radius Type: φ1~20mm | Standard / Long Reach, 68 specifications in total
Ball Nose Type: R0.5~R10mm | Standard / Long Reach, 33 specifications in total"

FAQ

What materials can the LU general-purpose end mill machine?

It handles ordinary steel up to 45HRC, stainless steel (SUS303/SUS304) up to 35HRC, cast iron, aluminum alloy, titanium alloy, copper alloy, graphite, and resin. Quenched and tempered steel (PX, NAK, HPM, STAVAX) up to about 45HRC is also in range, and high-hardness steel (SKD, DAC, DC, SKH) can go to 55/60/65HRC depending on the grade you pick.

How does unequal flute spacing actually help my cut?

Standard end mills have even flute pitch and a uniform helix, which lets vibration build up at a fixed frequency. The LU's flutes are staggered at different spacings and helix angles, so that frequency never settles. The result on the floor: less chatter, fewer tool marks, and edge chipping drops off—especially on long-reach cuts or thin-walled parts where chatter normally shows up first.

What sizes and types are available?

Square end: φ1–20mm, standard and long reach, 45 specs (9 of those are corner-protection types). Corner radius: φ1–20mm, standard and long reach, 68 specs. Ball nose: R0.5–R10mm, standard and long reach, 33 specs. That's 146 total, so you can usually find the exact reach and corner profile without going custom.

What's the lead time?

Standard LU items are kept in stock for quick shipment. If you need something outside the standard range or a large quantity, send us the specs and quantity—we'll confirm the lead time based on current stock and production schedule.

Do I need a different coating for my material?

The LU comes standard with PCH metallic gray (Hv2800), which is a general-purpose coating that covers steel, stainless, cast iron, and aluminum without switching tools. If you're running abrasive materials like graphite or high-silicon aluminum, or need maximum heat resistance, tell us your workpiece and cutting conditions—we'll check whether PCH is the right fit or recommend an alternative grade.