NACHI Milling

NACHI 4SE Square End Mill (4F)

Name: NACHI 4SE Square End Mill (4F)
Brand: NACHI

Workpiece material (ISO)

P · SteelM · StainlessN · Non-ferrous

4-flute HSS-Co square end mill for machining steel, stainless steel and non-ferrous metals. Ø2.5–50 mm in fine sub-millimetre increments (60 catalogue items). Ships in a single coating option. Part of NACHI's milling tool range. Rated for ISO P/M/N material classes.

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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 60 catalogue sizes.

4-Flute Square End

A fixed 4-flute square-end geometry (the catalogue's own "4F" designation) across the full size range.

Steel, Stainless & Non-Ferrous Coverage

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

Ø2.5–50 mm, 50–160 mm Overall Length

Diameters run Ø2.5–50 mm in fine sub-millimetre steps, with overall lengths from 50 to 160 mm across 60 sizes.

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 4SE. · Selection Chart pages E-4–E-7

Specifications

Sizes & part numbers

ORDER NO.	FLUTES	Ø	FLUTE L	OAL	SHANK	COATING
4SE2.5	4	2.5 mm	7	50	6	HSSCO
4SE3	4	3 mm	9	50	6	HSSCO
4SE3.5	4	3.5 mm	12	60	8	HSSCO
4SE4	4	4 mm	12	60	8	HSSCO
4SE4.5	4	4.5 mm	15	60	8	HSSCO
4SE5	4	5 mm	15	60	8	HSSCO
4SE5.5	4	5.5 mm	15	60	8	HSSCO
4SE6	4	6 mm	15	60	8	HSSCO
4SE6.5	4	6.5 mm	20	65	10	HSSCO
4SE7	4	7 mm	20	65	10	HSSCO
4SE7.5	4	7.5 mm	20	65	10	HSSCO
4SE8	4	8 mm	20	65	10	HSSCO
4SE8.5	4	8.5 mm	25	75	10	HSSCO
4SE9	4	9 mm	25	75	10	HSSCO
4SE9.5	4	9.5 mm	25	75	10	HSSCO
4SE10	4	10 mm	25	75	10	HSSCO
4SE11	4	11 mm	30	80	12	HSSCO
4SE12	4	12 mm	30	80	12	HSSCO
4SE13	4	13 mm	35	90	16	HSSCO
4SE14	4	14 mm	35	90	16	HSSCO
4SE15	4	15 mm	40	95	16	HSSCO
4SE16	4	16 mm	40	95	16	HSSCO
4SE17	4	17 mm	40	105	20	HSSCO
4SE18	4	18 mm	40	105	20	HSSCO
4SE19	4	19 mm	45	110	20	HSSCO
4SE20	4	20 mm	45	110	20	HSSCO
4SE20.5 □	4	20.5 mm	45	110	20	HSSCO
4SE21	4	21 mm	45	110	20	HSSCO
4SE21.5 □	4	21.5 mm	45	110	20	HSSCO
4SE22	4	22 mm	45	110	20	HSSCO
4SE22.5 □	4	22.5 mm	50	120	25	HSSCO
4SE23	4	23 mm	50	120	25	HSSCO
4SE23.5 □	4	23.5 mm	50	120	25	HSSCO
4SE24	4	24 mm	50	120	25	HSSCO
4SE24.5 □	4	24.5 mm	50	120	25	HSSCO
4SE25	4	25 mm	50	120	25	HSSCO
4SE25.5 □	4	25.5 mm	50	120	25	HSSCO
4SE26	4	26 mm	50	120	25	HSSCO
4SE27	4	27 mm	55	125	25	HSSCO
4SE28	4	28 mm	55	125	25	HSSCO
4SE29	4	29 mm	55	125	25	HSSCO
4SE30	4	30 mm	55	125	25	HSSCO
4SE31	4	31 mm	60	145	32	HSSCO
4SE32	4	32 mm	60	145	32	HSSCO
4SE33	4	33 mm	60	145	32	HSSCO
4SE34	4	34 mm	60	145	32	HSSCO
4SE35	4	35 mm	60	145	32	HSSCO
4SE36	4	36 mm	60	145	32	HSSCO
4SE37	4	37 mm	65	150	32	HSSCO
4SE38	4	38 mm	65	150	32	HSSCO
4SE39	4	39 mm	65	150	32	HSSCO
4SE40	4	40 mm	65	150	32	HSSCO
4SE42	4	42 mm	65	150	32	HSSCO
4SE42×42	4	42 mm	65	155	42	HSSCO
4SE45	4	45 mm	70	155	32	HSSCO
4SE45×42	4	45 mm	70	160	42	HSSCO
4SE48	4	48 mm	70	155	32	HSSCO
4SE48×42	4	48 mm	70	160	42	HSSCO
4SE50	4	50 mm	70	155	32	HSSCO
4SE50×42	4	50 mm	70	160	42	HSSCO