XS-MAX Unequal Helix Carbide End Mills for Stainless Steel

Name: XS-MAX Unequal Helix Carbide End Mills for Stainless Steel
Brand: KOVES

Unequal-helix-angle solid carbide end mills for stainless steel: 4-flute radius XSR445 (D4.0–D12.0) and 4-flute flat XSE445/XSEL445 (D1.0–D12.0).

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Product information

The XS-MAX unequal helix angle stainless steel machining series (catalog L26–L28) covers XSR445 4-flute radius (D4.0–D12.0) and XSE445/XSEL445 4-flute flat and long-shank flat (D1.0–D12.0), with 45° helix geometry.

Specifications

Cutter types	XSR445 4-flute radius; XSE445 4-flute flat; XSEL445 4-flute long-shank flat
Diameter range	D4.0–D12.0 mm radius; D1.0–D12.0 mm flat
Series feature	Unequal helix angle design for stainless steel machining
Example stock models	XSR445-060150R0.5-050-S06; XSE445-060160-050-S06; XSEL445-060300-100-S06

Available sizes

Model codes and dimensions reproduced from the Koves 2025 Solid Round Cutting Tools catalog. Stock items are listed in the catalog, not confirmed live — ask us for current availability.

XS-MAX Radius End Mill, 4-Flute, 45° helix

Catalog page 16 · 11 sizes · code XSR445

Model	Flutes	Helix angle (°)	Dia. (mm)	Flute length (mm)	Corner radius (mm)	Overall length (mm)	Shank dia. (mm)
XSR445-040100R0.5-050-S04	4F	45°	4	10	R0.5	50	4
XSR445-040100R0.2-050-S04	4F	45°	4	10	R0.2	50	4
XSR445-040100R1.0-050-S04	4F	45°	4	10	R1.0	50	4
XSR445-060150R0.5-050-S06	4F	45°	6	15	R0.5	50	6
XSR445-060150R1.0-050-S06	4F	45°	6	15	R1.0	50	6
XSR445-080200R0.5-060-S08	4F	45°	8	20	R0.5	60	8
XSR445-080200R1.0-060-S08	4F	45°	8	20	R1.0	60	8
XSR445-100250R0.5-075-S10	4F	45°	10	25	R0.5	75	10
XSR445-100250R1.0-075-S10	4F	45°	10	25	R1.0	75	10
XSR445-120300R0.5-075-S12	4F	45°	12	30	R0.5	75	12
XSR445-120300R1.0-075-S12	4F	45°	12	30	R1.0	75	12

XS-MAX Flat End Mill, 4-Flute, 45° helix

Catalog page 17 · 24 sizes · code XSE445

Model	Flutes	Helix angle (°)	Dia. (mm)	Flute length (mm)	Overall length (mm)	Shank dia. (mm)
XSE445-010020-050-S04	4F	45°	1	2	50	4
XSE445-010030-050-S04	4F	45°	1	3	50	4
XSE445-015030-050-S04	4F	45°	1.5	3	50	4
XSE445-015040-050-S04	4F	45°	1.5	4	50	4
XSE445-020040-050-S04	4F	45°	2	4	50	4
XSE445-020060-050-S04	4F	45°	2	6	50	4
XSE445-025050-050-S04	4F	45°	2.5	5	50	4
XSE445-025070-050-S04	4F	45°	2.5	7	50	4
XSE445-030060-050-S04	4F	45°	3	6	50	4
XSE445-030090-050-S04	4F	45°	3	9	50	4
XSE445-035070-050-S04	4F	45°	3.5	7	50	4
XSE445-035100-050-S04	4F	45°	3.5	10	50	4
XSE445-040080-050-S04	4F	45°	4	8	50	4
XSE445-040120-050-S04	4F	45°	4	12	50	4
XSE445-050100-050-S06	4F	45°	5	10	50	6
XSE445-050150-050-S06	4F	45°	5	15	50	6
XSE445-060120-050-S06	4F	45°	6	12	50	6
XSE445-060180-050-S06	4F	45°	6	18	50	6
XSE445-080200-060-S08	4F	45°	8	20	60	8
XSE445-080240-060-S08	4F	45°	8	24	60	8
XSE445-100200-075-S10	4F	45°	10	20	75	10
XSE445-100300-075-S10	4F	45°	10	30	75	10
XSE445-120240-075-S12	4F	45°	12	24	75	12
XSE445-120350-075-S12	4F	45°	12	35	75	12

Catalog page 17 · 5 sizes · code XSEL445

Model	Flutes	Helix angle (°)	Dia. (mm)	Flute length (mm)	Overall length (mm)	Shank dia. (mm)
XSEL445-040200-075-S04	4F	45°	4	20	75	4
XSEL445-060300-100-S06	4F	45°	6	30	100	6
XSEL445-080400-100-S08	4F	45°	8	40	100	8
XSEL445-100500-100-S10	4F	45°	10	50	100	10
XSEL445-120550-100-S12	4F	45°	12	55	100	12

How to read the model number

The catalog page “Detailed explanation of the model” reads a code left to right as series, cutter type, length mark, flutes, helix angle, cutting diameter, corner radius, cutting length, overall length and shank diameter. The original diagram is reproduced here:

Koves model-number key: how a carbide end mill code is read — series (HP/HM/HY/HS/HR/ALU/DIA/CO-MAX), cutter type (B/E/R/RE), length mark (L), flutes, helix angle, cutting diameter, corner radius, cutting length, overall length and shank diameter — Original “Detailed explanation of the model”, catalog folio L01 (2025).

Source: source-excerpts/catalog-2025-pages-3-4-milling-contents-model-code.txt — Original PDF page 4