RPMT and Related Round Milling Inserts
Compare RPMT, RPMW, RDMT, RDMW and RPGT round milling inserts from 6 to 16 mm by inscribed-circle diameter, thickness, hole diameter, relief angle, geometry and carbide grade. Match RPMT and RPMW models to compatible EMR round nose cutter bodies, and verify the exact pocket for the related round insert families.
Round Milling Inserts by Geometry and Relief Angle
The complete model code determines the cutter pocket, thickness, relief angle and grade options. Use the family navigation below before comparing individual dimensions.
Standard MO Range
8, 10 and 12 mm round positive inserts in MO geometry.
MO-JS Range
8, 10 and 12 mm RPMT models with the complete MO-JS suffix.
MOTN Range
8, 10 and 12 mm round inserts with 15° relief.
6–16 mm Range
Four round insert sizes with MO geometry and 15° relief.
D01 Non-Ferrous Range
8, 10 and 12 mm AK geometries for aluminum and non-ferrous materials.
What Are RPMT and Related Round Milling Inserts?
RPMT is one of several round indexable milling insert families used for profile milling, copy milling, pocketing, surfacing and related contour operations. This page also includes RPMW, RDMT, RDMW and RPGT models from the same round-insert product group.
The family code identifies the round shape, relief angle, tolerance and clamping/chip-form configuration. The following size and suffix characters identify the exact insert. Models with the same nominal diameter are not automatically interchangeable because thickness, relief angle, hole geometry and pocket seating can differ.
RPMW, RPMT, RDMT, RDMW and RPGT Insert Models
Compare every listed round insert by inscribed-circle diameter, thickness, hole diameter, relief angle, geometry and grade options. The complete designation must be retained when requesting a quotation or replacement.
How to Compare the Models
Start with the exact cutter pocket, then confirm IC, T, D, relief angle and the complete geometry suffix. Similar 8, 10 or 12 mm models can use different thicknesses and relief angles.
RPMW Round Milling Inserts
| Complete Designation | IC (mm) | T (mm) | D (mm) | Relief | Geometry | Grade Options | Size Direction |
|---|---|---|---|---|---|---|---|
| RPMW08T2MO | 8 | 2.78 | 3.40 | 11° | MO | D530D570D580 | 8 mm / nominal R4 platform |
| RPMW1003MO | 10 | 3.18 | 4.40 | 11° | MO | D530D570D580D7320D9920S | 10 mm / nominal R5 platform |
| RPMW1204MO | 12 | 4.76 | 4.40 | 11° | MO | D530D570D580D7320D9920S | 12 mm / nominal R6 platform |
RPMT MO-JS Round Milling Inserts
| Complete Designation | IC (mm) | T (mm) | D (mm) | Relief | Geometry | Grade Options | Size Direction |
|---|---|---|---|---|---|---|---|
| RPMT08T2MO-JS | 8 | 2.58 | 3.40 | 11° | MO-JS | D530D570D580D7320 | 8 mm / nominal R4 platform |
| RPMT10T3MO-JS | 10 | 3.97 | 4.40 | 11° | MO-JS | D530D570D580D7320 | 10 mm / nominal R5 platform |
| RPMT1204MO-JS | 12 | 4.76 | 4.40 | 11° | MO-JS | D530D570D580D7320 | 12 mm / nominal R6 platform |
RDMT Round Milling Inserts
| Complete Designation | IC (mm) | T (mm) | D (mm) | Relief | Geometry | Grade Options | Size Direction |
|---|---|---|---|---|---|---|---|
| RDMT08T2MOTN | 8 | 2.78 | 3.40 | 15° | MOTN | D530D570D580D7320 | 8 mm round insert |
| RDMT10T3MOTN | 10 | 3.97 | 4.40 | 15° | MOTN | D530D570D580D7320 | 10 mm round insert |
| RDMT1204MOTN | 12 | 4.76 | 4.40 | 15° | MOTN | D530D570D580D7320D9920S | 12 mm round insert |
RDMW Round Milling Inserts
| Complete Designation | IC (mm) | T (mm) | D (mm) | Relief | Geometry | Grade Options | Size Direction |
|---|---|---|---|---|---|---|---|
| RDMW0602MO | 6 | 2.48 | 2.80 | 15° | MO | D530D570D580 | Compact 6 mm round insert |
| RDMW10T3MO | 10 | 3.97 | 4.40 | 15° | MO | D530D570D580 | 10 mm round insert |
| RDMW1204MO | 12 | 4.76 | 4.40 | 15° | MO | D530D570D580D7320 | 12 mm round insert |
| RDMW1605MO | 16 | 4.76 | 5.50 | 15° | MO | D530D570D580 | Largest listed 16 mm round insert |
RPGT Round Inserts for Aluminum
The RPGT-AK range is offered in D01 grade for aluminum and other non-ferrous machining directions.
| Complete Designation | IC (mm) | T (mm) | D (mm) | Relief | Geometry | Grade Options | Material Direction |
|---|---|---|---|---|---|---|---|
| RPGT0803MO-AK | 8 | 2.78 | 3.40 | 11° | MO-AK | D01 | Aluminum and non-ferrous materials |
| RPGT1003MO-AK | 10 | 3.18 | 4.40 | 11° | MO-AK | D01 | Aluminum and non-ferrous materials |
| RPGT1204MO-AK | 12 | 4.76 | 4.40 | 11° | MO-AK | D01 | Aluminum and non-ferrous materials |
RPMW, RPMT, RDMT, RDMW and RPGT Are Separate Insert Families
The shared round shape does not make these models universally interchangeable. Relief angle, tolerance, thickness, hole geometry and cutter-pocket seating must all match.
11° Positive Round Inserts
- RPMW uses MO geometry in 8, 10 and 12 mm sizes.
- RPMT uses MO-JS geometry in 8, 10 and 12 mm sizes.
- These are the primary families matched to compatible EMR round nose cutters.
15° Relief Round Inserts
- RDMT is listed in 8, 10 and 12 mm MOTN models.
- RDMW covers 6, 10, 12 and 16 mm MO models.
- Confirm a cutter designed for the 15° relief family.
D01 Non-Ferrous Models
- MO-AK geometry in 8, 10 and 12 mm sizes.
- D01 grade is listed for the complete range.
- Use for compatible aluminum and non-ferrous cutter systems.
Round Insert Grade Options by Machining Condition
First confirm that the grade is offered for the exact RPMW, RPMT, RDMT, RDMW or RPGT model, then select the grade direction according to workpiece material, stability and wear mode.
Steel and cast-iron direction where edge toughness and interrupted-cut reliability are important.
General steel and stainless-steel direction, including stable and finishing-oriented work.
Steel and cast-iron direction for selected stable machining and wear-resistance requirements.
General-purpose direction across steel, stainless steel and cast iron.
Available on selected 10 and 12 mm models for hardened and difficult-material machining directions.
Grade option for the RPGT MO-AK range used in aluminum and non-ferrous machining directions.
Match RPMW and RPMT Inserts to EMR Cutter Bodies
EMR round nose end mills and face milling cutters are organized around RPMW and RPMT insert-circle sizes. Confirm the exact body code, pocket, screw and full insert designation before ordering. RDMT, RDMW and RPGT require cutter bodies specifically designed for those families.
8 mm / 08T2 Platform
Match compatible EMR R4 round nose end mills to the 08T2 pocket. Review RPMW08T2MO and RPMT08T2MO-JS dimensions before selection.
10 mm / 1003–10T3 Platform
Used across compatible EMR R5 round nose end mills and selected face milling bodies. Confirm whether the pocket requires RPMW1003 or RPMT10T3.
12 mm / 1204 Platform
Match compatible EMR R6 face milling cutters to RPMT1204 dimensions and the required MO or MO-JS model.
Round Milling Insert Applications
Round cutting edges distribute load continuously as the engagement point moves around the insert. Actual capability and maximum depth depend on the selected cutter-body design, relief family and pocket orientation.
Profile Milling
For curved surfaces, contours and changing engagement angles in compatible round-insert cutters.
Profile milling toolsCopy Milling
For die, mould and freeform-surface machining where the tool follows complex 3D geometry.
Pocketing and Ramping
For compatible cutters designed for axial entry, ramping, helical interpolation and residual-stock removal.
Face and Surface Milling
For EMR face milling bodies using 10 mm or 12 mm round inserts to machine broad surfaces.
Face milling toolsHow to Choose a Round Milling Insert
Request Round Insert Pricing and Cutter Compatibility Review
Provide the complete insert and cutter information so the correct family, size, thickness, relief angle, geometry and carbide grade can be checked.
