HR-MAX Micro Carbide End Mills
Micro solid carbide end mills for precision and deep-groove machining: flat D0.1–D0.9 mm, ball nose R0.05–R0.45 mm, radius D0.2–D0.8 mm.
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Product information
The HR-MAX micro end mills series (catalog L57–L59) covers MHRE-230 2-flute micro flat (D0.1–D0.9), MHRB-230 2-flute micro ball nose (R0.05–R0.45) and MHRR-230 2-flute micro radius (D0.2–D0.8), for deep-groove micro-diameter machining.
Specifications
| Cutter types | MHRE-230 2-flute micro flat; MHRB-230 2-flute micro ball nose; MHRR-230 2-flute micro radius |
|---|---|
| Diameter range | D0.1–D0.9 mm flat; R0.05–R0.45 mm ball nose; D0.2–D0.8 mm radius |
| Series positioning | Deep-groove micro-diameter machining series; catalog contents list HR-MAX Micro End Mills Series |
| Example stock models | MHRE230-003006-050-S04; MHRB230-005008-045-S04; MHRR230-004008R0.05-045-S04 |
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.
HR-MAX Micro Diameter Flat End Mill, 2-Flute, 30° helix
Catalog page 32 · 13 sizes · code MHRE230
| Model | Dia. (mm) | Flute length (mm) | Shank dia. (mm) | Overall length (mm) |
|---|---|---|---|---|
| MHRE230-001003-050-S04 | 0.1 | 0.2 | d4 | 50 |
| MHRE230-0015003-050-S04 | 0.15 | 0.3 | d4 | 50 |
| MHRE230-002004-050-S04 | 0.2 | 0.4 | d4 | 50 |
| MHRE230-0025005-050-S04 | 0.25 | 0.5 | d4 | 50 |
| MHRE230-003006-050-S04 | 0.3 | 0.6 | d4 | 50 |
| MHRE230-0035007-050-S04 | 0.35 | 0.7 | d4 | 50 |
| MHRE230-004008-050-S04 | 0.4 | 0.8 | d4 | 50 |
| MHRE230-0045009-050-S04 | 0.45 | 0.9 | d4 | 50 |
| MHRE230-005010-050-S04 | 0.5 | 1 | d4 | 50 |
| MHRE230-006012-050-S04 | 0.6 | 1.2 | d4 | 50 |
| MHRE230-007014-050-S04 | 0.7 | 1.4 | d4 | 50 |
| MHRE230-008016-050-S04 | 0.8 | 1.6 | d4 | 50 |
| MHRE230-009018-050-S04 | 0.9 | 1.8 | d4 | 50 |
HR-MAX Micro Diameter Ball End Mill, 2-Flute, 30° helix
Catalog page 32 · 7 sizes · code MHRB230
| Model | Ball radius (mm) | Dia. (mm) | Flute length (mm) | Shank dia. (mm) | Overall length (mm) |
|---|---|---|---|---|---|
| MHRB230-002004-050-S04 | R0.1 | 0.2 | 0.4 | d4 | 50 |
| MHRB230-003006-050-S04 | R0.15 | 0.3 | 0.6 | d4 | 50 |
| MHRB230-004008-050-S04 | R0.2 | 0.4 | 0.8 | d4 | 50 |
| MHRB230-005010-050-S04 | R0.25 | 0.5 | 1.0 | d4 | 50 |
| MHRB230-006012-050-S04 | R0.3 | 0.6 | 1.2 | d4 | 50 |
| MHRB230-007014-050-S04 | R0.35 | 0.7 | 1.4 | d4 | 50 |
| MHRB230-008016-050-S04 | R0.4 | 0.8 | 1.6 | d4 | 50 |
HR-MAX Long Neck Ball End Mill, 2-Flute, 30° helix
Catalog page 33 · 30 sizes · code NHRB230
| Model | Dia. (mm) | Neck length (mm) | Dia. (mm) (2) | Corner radius (mm) | Flute length (mm) | Shank dia. (mm) | Overall length (mm) |
|---|---|---|---|---|---|---|---|
| NHRB230-002010-050-S04 | 0.2 | 1 | 0.37 | R0.1 | 0.16 | 4 | 50 |
| NHRB230-002015-050-S04 | 0.2 | 1.5 | 0.18 | R0.1 | 0.16 | 4 | 50 |
| NHRB230-002020-050-S04 | 0.2 | 2 | 0.37 | R0.1 | 0.16 | 4 | 50 |
| NHRB230-003010-050-S04 | 0.3 | 1 | 0.37 | R0.1 | 0.16 | 4 | 50 |
| NHRB230-003020-050-S04 | 0.3 | 2 | 0.27 | R0.15 | 0.24 | 4 | 50 |
| NHRB230-003030-050-S04 | 0.3 | 3 | 0.37 | R0.15 | 0.24 | 4 | 50 |
| NHRB230-004010-050-S04 | 0.4 | 1 | 0.37 | R0.15 | 0.24 | 4 | 50 |
| NHRB230-004020-050-S04 | 0.4 | 2 | 0.37 | R0.2 | 0.32 | 4 | 50 |
| NHRB230-004040-050-S04 | 0.4 | 4 | 0.37 | R0.2 | 0.32 | 4 | 50 |
| NHRB230-004060-050-S04 | 0.4 | 6 | 0.37 | R0.2 | 0.32 | 4 | 50 |
| NHRB230-005020-050-S04 | 0.5 | 2 | 0.46 | R0.2 | 0.32 | 4 | 50 |
| NHRB230-005040-050-S04 | 0.5 | 4 | 0.46 | R0.25 | 0.4 | 4 | 50 |
| NHRB230-005060-050-S04 | 0.5 | 6 | 0.46 | R0.25 | 0.4 | 4 | 50 |
| NHRB230-005080-050-S04 | 0.5 | 8 | 0.46 | R0.25 | 0.4 | 4 | 50 |
| NHRB230-006020-050-S04 | 0.6 | 2 | 0.55 | R0.25 | 0.4 | 4 | 50 |
| NHRB230-006030-050-S04 | 0.6 | 3 | 0.55 | R0.3 | 0.48 | 4 | 50 |
| NHRB230-006040-050-S04 | 0.6 | 4 | 0.55 | R0.3 | 0.48 | 4 | 50 |
| NHRB230-006060-050-S04 | 0.6 | 6 | 0.55 | R0.3 | 0.48 | 4 | 50 |
| NHRB230-006080-050-S04 | 0.6 | 8 | 0.55 | R0.3 | 0.48 | 4 | 50 |
| NHRB230-008020-050-S04 | 0.8 | 2 | 0.55 | R0.4 | 0.64 | 4 | 50 |
| NHRB230-008040-050-S04 | 0.8 | 4 | 0.55 | R0.4 | 0.64 | 4 | 50 |
| NHRB230-008060-050-S04 | 0.8 | 6 | 0.75 | R0.4 | 0.64 | 4 | 50 |
| NHRB230-008080-050-S04 | 0.8 | 8 | 0.95 | R0.4 | 0.64 | 4 | 50 |
| NHRB230-008100-050-S04 | 0.8 | 10 | 0.95 | R0.4 | 0.64 | 4 | 50 |
| NHRB230-010040-050-S04 | 1.0 | 4 | 0.95 | R0.4 | 0.64 | 4 | 50 |
| NHRB230-010060-050-S04 | 1.0 | 6 | 0.95 | R0.5 | 0.8 | 4 | 50 |
| NHRB230-010080-050-S04 | 1.0 | 8 | 0.95 | R0.5 | 0.8 | 4 | 50 |
| NHRB230-010100-050-S04 | 1.0 | 10 | 0.95 | R0.5 | 0.8 | 4 | 50 |
| NHRB230-010120-050-S04 | 1.0 | 12 | 0.95 | R0.5 | 0.8 | 4 | 50 |
| NHRB230-010160-050-S04 | 1.0 | 16 | 0.95 | R0.5 | 0.8 | 4 | 50 |
HR-MAX Micro Diameter Radius End Mill, 2-Flute, 30° helix
Catalog page 33 · 11 sizes · code MHRR230
| Model | Ball radius (mm) | Dia. (mm) | Flute length (mm) | Shank dia. (mm) | Overall length (mm) |
|---|---|---|---|---|---|
| MHRR230-002004R0.05-050-S04 | R0.05 | 0.2 | 0.4 | d4 | 50 |
| MHRR230-003006R0.05-050-S04 | R0.05 | 0.3 | 0.6 | d4 | 50 |
| MHRR230-004008R0.05-050-S04 | R0.05 | 0.4 | 0.8 | d4 | 50 |
| MHRR230-004008R0.1-050-S04 | R0.1 | 0.4 | 0.8 | d4 | 50 |
| MHRR230-005010R0.05-050-S04 | R0.05 | 0.5 | 1.0 | d4 | 50 |
| MHRR230-005010R0.1-050-S04 | R0.1 | 0.5 | 1.0 | d4 | 50 |
| MHRR230-006012R0.05-050-S04 | R0.05 | 0.6 | 1.2 | d4 | 50 |
| MHRR230-006012R0.1-050-S04 | R0.1 | 0.6 | 1.2 | d4 | 50 |
| MHRR230-007014R0.05-050-S04 | R0.05 | 0.7 | 1.4 | d4 | 50 |
| MHRR230-007014R0.1-050-S04 | R0.1 | 0.7 | 1.4 | d4 | 50 |
| MHRR230-008016R0.05-050-S04 | R0.05 | 0.8 | 1.6 | d4 | 50 |
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:
Source: source-excerpts/catalog-2025-pages-3-4-milling-contents-model-code.txt — Original PDF page 4