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SOMT Inserts for High-Feed Milling

SOMT High-Feed Milling Inserts

Compare SOMT100420ER-GM, SOMT140520ER-GM and SOMT140520ER-LD carbide milling inserts by dimensions, geometry and grade options. Match SOMT100420 to verified MFH10 and MFH large-depth cutter systems, and confirm the complete dedicated cutter designation before selecting a SOMT140520 insert.

View SOMT Specifications Match Milling Cutters Request Pricing

SOMT100420 and SOMT140520 high-feed milling inserts

SOMT1004 and SOMT1405 milling inserts

SOMT dimensions: IC, T, D, RE and relief angle

Insert PlatformsSOMT1004 and SOMT1405

Complete Models100420ER-GM, 140520ER-GM and 140520ER-LD

Cutting Edges4 usable corners

Corner RadiusRE = 2.0 mm

Grade OptionsD530, D570, D580 and selected D7320

Milling SystemsMFH10 and MFH large-depth cutters; verify SOMT14 bodies

Browse by Size and Geometry

SOMT100420 and SOMT140520 Product Range

The 1004 and 1405 sizes use different dimensions, hole diameters and cutter pockets. The GM and LD suffixes also identify different cutting geometries.

SOMT100420ER-GM

1004 General High-Feed Geometry

IC 10.3 mm, thickness 4.58 mm and hole diameter 4.6 mm. Used with MFH10 and other compatible SOMT10 cutter bodies.

View SOMT1004 specifications

SOMT140520ER-GM

1405 General High-Feed Geometry

IC 14.14 mm, thickness 5.56 mm and hole diameter 5.8 mm. The widest grade selection in this product group.

View SOMT1405-GM specifications

SOMT140520ER-LD

1405 Large-Depth Geometry

Catalogue IC is 14.26 mm. Thickness, hole diameter and corner radius match the listed 1405 GM values, while LD remains a separate manufacturer geometry code.

View SOMT1405-LD specifications

Insert Identification

What Is a SOMT High-Feed Milling Insert?

SOMT is a square positive-relief milling insert family used in compatible high-feed and large-depth milling cutter systems.

The complete designation identifies the size, 2.0 mm corner radius, right-hand edge direction and the manufacturer-specific GM or LD geometry. Milling SOMT inserts must be matched by the complete code because visually similar drilling inserts and other SOMT platforms can use different dimensions, edge forms and tool-body pockets.

1004Compact Platform10.3 mm IC

1405Larger Platform14.14 mm IC

GMGeneral GeometryBroad high-feed use

LDLarge-Depth GeometryHeavy roughing direction

Keep the full ER-GM or ER-LD suffix when ordering. GM and LD are separate manufacturer geometry codes; maximum depth and entry capability must be confirmed from the complete cutter documentation.

Dimensions and Grade Options

SOMT Milling Insert Specifications

Compare IC, thickness, mounting-hole diameter, corner radius, relief angle, geometry and model-specific grade options.

Dimension Guide

Use the technical drawing in the first screen as the visual reference, then verify every catalogue value against the complete insert and cutter designation.

IC — Inscribed-circle dimension T — Insert thickness D — Mounting-hole diameter RE — Corner radius α — Relief angle Edges — Four usable corners

Complete Designation	IC (mm)	T (mm)	D (mm)	RE (mm)	Relief	Geometry	Grade Options	Cutter Direction
SOMT100420ER-GM	10.3	4.58	4.6	2.0	16°	GM	D530D570D580	MFH10 / SOMT10 MFH systems
SOMT140520ER-GM	14.14	5.56	5.8	2.0	16°	GM	D530D570D580D7320	dedicated SOMT14 / SOMT14 MFH systems
SOMT140520ER-LD	14.26	5.56	5.8	2.0	16°	LD	D530D570D580	dedicated SOMT14 / SOMT14 large-depth systems

D7320 is available only for SOMT140520ER-GM in this product range. The LD model has a catalogue IC value of 14.26 mm, while the GM model is listed at 14.14 mm. Always match the complete insert model.

Geometry Selection

GM vs LD Geometry

GM and LD are separate manufacturer geometry codes. Use them only with a cutter body and application data that explicitly support the complete insert designation.

GM Geometry

General High-Feed Direction

General-purpose direction within the listed SOMT high-feed range.
Ramping, helical interpolation and plunging depend on the exact cutter-body design.
Confirm maximum depth and entry capability from the cutter documentation.

LD Geometry

Large-Depth Direction

Separate geometry direction for larger-depth roughing applications.
Do not substitute it for GM solely because thickness and hole diameter are similar.
Confirm maximum depth, entry method and pocket compatibility from the exact cutter documentation.

Carbide Grade Direction

SOMT Grade Options by Workpiece Material

First confirm that the grade is listed for the exact SOMT model, then match the grade direction to material, machining stability, coolant and wear mode.

D530

Steel and cast-iron direction where toughness and interrupted-cut reliability are important.

D570

General steel and stainless-steel direction, including stable and lighter finishing loads.

D580

Steel and cast-iron direction for selected stable machining and wear-resistance requirements.

D7320

General-purpose steel, stainless and cast-iron direction, available only on SOMT140520ER-GM.

MFH10 high-feed milling cutter for SOMT100420ER-GM inserts

MFH10 Cutter PlatformCompact verified cutter direction for SOMT100420ER-GM

MFH large-depth milling cutter for SOMT100420 inserts

MFH Large-Depth CuttersVerified SOMT100420 holder direction in the supplied cutter catalogue

Cutter Compatibility

Match SOMT100420 Inserts to MFH10 and MFH Cutters

The supplied cutter catalogues clearly support SOMT100420 in MFH10 and MFH large-depth systems. For SOMT140520ER-GM or SOMT140520ER-LD, confirm the complete dedicated cutter-body designation and pocket drawing before publishing a compatibility claim.

SOMT100420ER-GM → MFH10Compact MFH10 high-feed end-mill platform. Match the complete cutter model and pocket.

SOMT100420 → MFH Large-Depth HoldersSupplied holder range covers approximately Ø25–40 mm shank cutters.

SOMT140520ER-GM / LDUse only with a dedicated SOMT14 cutter body whose documentation confirms the exact insert suffix and pocket.

Clamping HardwareThe listed SOMT100420 MFH large-depth holders use M4 screws and a T15 wrench.

MFH10, MFH large-depth and other SOMT cutter systems may use different pockets and clamping parts. They are not automatically interchangeable.

View Verified MFH Holder Models High-Feed Milling Tools

SOMT100420 Cutter Range

MFH Large-Depth Holder Models

Cutter Model	Teeth	Cutter Ø (mm)	Shank Ø (mm)	Total Length (mm)	Blade Length (mm)	Insert Platform
MFH 25-S25-10-2T-160	2	25	25	160	35	SOMT100420
MFH 25-S25-10-2T-200	2	25	25	200	40	SOMT100420
MFH 28-S25-10-2T-160	2	28	25	160	35	SOMT100420
MFH 28-S25-10-2T-200	2	28	25	200	40	SOMT100420
MFH 30-S25-10-2T-160	2	30	25	160	35	SOMT100420
MFH 30-S25-10-2T-200	2	30	25	200	40	SOMT100420
MFH 32-S32-10-3T-160	3	32	32	160	35	SOMT100420
MFH 32-S32-10-3T-200	3	32	32	200	40	SOMT100420
MFH 35-S32-10-3T-160	3	35	32	160	35	SOMT100420
MFH 35-S32-10-3T-200	3	35	32	200	40	SOMT100420
MFH 40-S32-10-4T-160	4	40	32	160	35	SOMT100420
MFH 40-S32-10-4T-200	4	40	32	200	40	SOMT100420

The listed MFH10-size holders use M4 clamping screws and a T15 wrench in the supplied cutter range.

Insert Economy

Four Usable Cutting Corners

The square SOMT milling design provides four indexable cutting corners. Correct indexing and stable pocket seating allow each corner to be used before the insert is replaced.

Four Indexed CornersFour cutting positions around the square insert.

2.0 mm Corner RadiusShared by all three listed milling models.

Positive Relief16° relief direction in the product range.

Lower Cost per CornerMultiple cutting positions from one insert.

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High-Feed and Large-Depth Applications

SOMT Milling Applications

Actual capability depends on the complete cutter body, GM or LD geometry, carbide grade, machine rigidity and workpiece setup.

High-Feed Face Milling

General roughing direction for SOMT inserts used in compatible high-feed cutter systems.

High-feed milling tools

Large-Depth Roughing

LD geometry direction for larger axial engagement when the exact cutter documentation supports it.

Pocket and Mould Roughing

For suitable GM cutter bodies where chip evacuation, radial engagement and remaining stock are controlled.

Ramping, Helical and Plunging

Use only with a cutter body specifically designed and documented for axial or oblique entry.

Frequently Asked Questions

SOMT Milling Insert FAQ

Are SOMT milling inserts interchangeable with SOMT U-drill inserts?

No. They use different dimensions, geometries and tool-body pockets. Confirm the complete insert and tool designation. View SOMT U-drill inserts

What is the difference between SOMT140520ER-GM and SOMT140520ER-LD?

They are separate manufacturer geometry codes. The catalogue lists IC 14.14 mm for GM and 14.26 mm for LD, while both list 5.56 mm thickness, 5.8 mm hole diameter and a 2.0 mm corner radius.

Which cutter uses SOMT100420?

The supplied catalogues support SOMT100420 in MFH10 and MFH large-depth cutter systems. Match the complete cutter code, pocket, screw and insert suffix.

Can every SOMT cutter perform ramping, helical interpolation or plunging?

No. These entry methods depend on the exact cutter-body design and technical documentation, not only on the insert designation.

Selection Checklist

How to Choose a SOMT Milling Insert

Confirm Milling, Not DrillingIdentify the complete MFH or dedicated SOMT milling body before selecting the insert.

Select 1004 or 1405Match the insert size specified by the cutter pocket.

Check All DimensionsVerify IC, T, D, RE and the 16° relief direction.

Select GM or LDUse GM or LD only according to the complete cutter and application documentation.

Select an Available GradeUse only a grade listed for the exact SOMT model.

Confirm the OperationState face milling, pocket roughing, entry method or large-depth roughing.

Send Quantity and Tool-Life DataInclude cutter code, material, cutting data, quantity and current failure mode.

Request Pricing

Request SOMT Milling Insert Pricing and Cutter Compatibility Review

Provide the complete insert and milling cutter details so the correct size, geometry, carbide grade and pocket fit can be checked.

Complete SOMT100420ER-GM, SOMT140520ER-GM or SOMT140520ER-LD code MFH10, MFH large-depth or complete dedicated SOMT14 cutter-body model Cutter diameter, bore or shank, tooth count and clamping parts Workpiece material, hardness and milling operation Required quantity, cutting data and current tool-life problem

SOMT High Feed Insert

SOMT High-Feed Milling Inserts