NACHI Milling

NACHI LRE Roughing End Mill (4/5/6F)

Name: NACHI LRE Roughing End Mill (4/5/6F)
Brand: NACHI

Workpiece material (ISO)

P · SteelM · StainlessN · Non-ferrous

4/5/6-flute HSS-Co square end mill for machining steel, stainless steel and non-ferrous metals, for high-efficiency roughing. Ø12–50 mm in whole-millimetre sizes (16 catalogue items). Ships in a single coating option. Part of NACHI's milling tool range.

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Features & uses

Engineered for performance

HSS-Co Substrate, Uncoated

A cobalt-alloyed high-speed-steel body with no coating, across all 16 catalogue sizes.

4/5/6-Flute Roughing Geometry

A 3-way flute-count choice (4F/5F/6F) under the catalogue's own "Roughing" designation, for high material-removal-rate cuts.

Steel, Stainless & Non-Ferrous Coverage

Rated for ISO P (steel), M (stainless steel) and N (non-ferrous metal) material groups.

Ø12–50 mm, 105–250 mm Overall Length

Diameters run Ø12–50 mm in whole-millimetre steps, with overall lengths from 105 to 250 mm across 16 sizes.

High-Efficiency Roughing

The catalogue's own "Roughing" line name signals this end mill is purpose-built for bulk stock removal, not finishing passes, and is the largest-diameter-minimum end mill (Ø12 mm floor) in this phase's NACHI drafting.

Workpiece material

Material applicability

Steel

Structural steel SS400
○ Suitable
Catalogue mark: ○
Carbon steel S45C/S50C
○ Suitable
Catalogue mark: ○
Alloy steel SCM/SCR
○ Suitable
Catalogue mark: ○

Hardened steel

Pre-hardened steel NAK
○ Suitable
Catalogue mark: ○
High-hardness steel 30–45 HRC
Not marked
Catalogue mark: —
High-hardness steel 45–55 HRC
Excluded
Catalogue mark: ×
High-hardness steel 55–60 HRC
Excluded
Catalogue mark: ×
High-hardness steel 60–66 HRC
Excluded
Catalogue mark: ×

Stainless steel

Stainless steel SUS304/316
○ Suitable
Catalogue mark: ○

Cast iron

Cast iron FC/FCD
○ Suitable
Catalogue mark: ○

Non-ferrous

Aluminum alloy AC/ADC
○ Suitable
Catalogue mark: ○
Copper Cu
○ Suitable
Catalogue mark: ○

Source: Catalogue · NACHI 2003-29 catalogue HSS End Mill Selection Chart, visually reviewed for LRE. · Selection Chart pages E-4–E-7

Specifications

Sizes & part numbers

ORDER NO.	FLUTES	Ø	FLUTE L	OAL	SHANK	COATING
LRE12	4	12 mm	55	105	12	HSSCO
LRE14	4	14 mm	55	110	16	HSSCO
LRE15	4	15 mm	65	120	16	HSSCO
LRE16	4	16 mm	65	120	16	HSSCO
LRE18	4	18 mm	65	130	20	HSSCO
LRE20	4	20 mm	75	140	20	HSSCO
LRE22	4	22 mm	75	140	20	HSSCO
LRE24	4	24 mm	90	160	25	HSSCO
LRE25	4	25 mm	90	160	25	HSSCO
LRE28	5	28 mm	90	160	25	HSSCO
LRE30	5	30 mm	105	190	32	HSSCO
LRE32	5	32 mm	105	190	32	HSSCO
LRE35	5	35 mm	115	200	32	HSSCO
LRE40	5	40 mm	125	210	42	HSSCO
LRE45	6	45 mm	130	230	42	HSSCO
LRE50	6	50 mm	140	250	42	HSSCO