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  • End mill fi 20 mm - Round plates RDM 1003 L 120 mm Z-2 Smoxh
  • End mill fi 20 mm - Round plates RDM 1003 L 120 mm Z-2 Smoxh - nr. 1
Smoxh

End mill RD1003 D20 W20 L120 Z-2 Smoxh

Smoxh Smoxh
14964
Diameter (mm): 202 sizes of this cutter
2025
€56.64 tax inc.

Net price: €46.05

Brak w magazynie
Brak w magazynie

Call and order: (44) 755-04-05

Description

Ø20 mm indexable end mill for Ø10 mm round inserts – Smoxh RD1003

Technical data and dimensions – 20 mm Weldon shank, two RDMW 1003 inserts

Technical data
Cutter diameter D 20 mm
Shank diameter d 20 mm, Weldon
Max. depth of cut a 5 mm
Flute length l 30 mm
Overall length L 120 mm
Number of inserts Z 2
Inserts round RD.. 1003 (Ø 10 mm), e.g., RDMW 1003
Coolant supply external
Insert screw M3.5x8, Torx T15, 2.7 N·m
Manufacturer Smoxh, Turkey (SM13230)
Smoxh Ø20 mm indexable end mill for Ø10 mm round inserts – dimensional drawing, 20 mm Weldon shank
Smoxh Ø20 mm indexable end mill for Ø10 mm round inserts – dimensional drawing, 20 mm Weldon shank
Diameter20 mm
Depth of cutup to 5 mm
Inserts2 × RDMW 1003
Overall length120 mm

Ø20 mm indexable end mill for Ø10 mm round inserts Smoxh RD1003 is a copy milling cutter with two inserts. It machines flat surfaces, steps, slots, pockets, holes and 3D shapes. The round edge has no corner that could chip. Each insert can be indexed several times before replacement. The 20 mm Weldon shank has a flat for the holder screw, preventing the cutter from rotating or pulling out.

Round insert – angle and chip thickness increase with depth

Why a round-insert cutter can handle a higher feed rate

A rectangular insert always cuts at the same angle. A round insert cuts at an angle that depends on the depth of cut. At a shallow depth, only the bottom of the circle engages, producing a thin chip. Cutting force is then low, and the cutter does not vibrate even with a long overhang.

Ø10 mm round insert at depths of 1 mm and 5 mm – entering angle and chip thickness
Ø10 mm round insert at depths of 1 mm and 5 mm – entering angle and chip thickness

The drawing shows a Ø 10 mm insert at two depths. At 1 mm, the edge contacts the material at an angle of approximately 37°. At 5 mm, the full depth, the angle reaches 90°, as with a shoulder mill. Calculate the angle as follows: subtract the depth from the insert radius of 5 mm and divide by 5 mm. For 1 mm, this gives 4 ÷ 5 = 0.8, and the angle with a cosine of 0.8 is approximately 37°. The smaller the angle, the thinner the chip at the same feed rate.

A thinner chip allows a higher feed rate. At a depth of 1 mm, the feed per tooth can be approximately 1.7 times that of a 90° cutter. Chip thickness and insert load remain the same. Shallow, fast passes are therefore the most productive way to use this cutter.

Six operations with one cutter – from flat surfaces to 3D shapes

Face milling, step, slot, pocket, hole, contoured surface

Smoxh identifies this cutter with six operation pictograms. The drawings illustrate these operations with cutter movement and material removal. All result from one feature: the insert is a circle with a radius of 5 mm. The bottom therefore meets the wall with a radius rather than a sharp corner.

Face milling with a 20 mm round-insert cutter, 10 mm flat strip per pass

Face milling

Feed the cutter across the workpiece at a shallow depth. A flat bottom forms beneath the lowest point of the inserts in a strip 10 mm wide. Use a stepover of no more than 10 mm for successive passes. This removes a riser, scale or the face of a casting.

Step milling with a 20 mm round-insert cutter, 5 mm radius at the bottom

Step with a rounded corner

Use the side of the cutter to remove material along the edge of the workpiece. The bottom blends into the wall with a radius of 5 mm – the insert radius. This radius strengthens the workpiece corner. Machine a taller step in layers no deeper than 5 mm.

Milling a 20 mm wide slot with a round-insert cutter, 10 mm flat bottom

20 mm wide slot

The cutter travels through the middle of the material and cuts a slot 20 mm wide. The bottom is flat over 10 mm, with 5 mm radii at the walls. The slot reaches its full width of 20 mm at a depth of 5 mm. A shallower slot is narrower; for example, at 2 mm it is 18 mm wide.

Pocket with ramp entry, 20 mm round-insert cutter descends into the material at an angle

Pocket with ramp entry

The cutter descends into the material along a straight inclined path while moving sideways. No starter hole is needed. At an angle of 2°, descending to 5 mm requires approximately 145 mm of travel: 5 mm ÷ 0.035 (tangent of 2°). The cutter then clears the pocket layer by layer.

Hole from 23 to 37 mm milled by helical interpolation with a 20 mm round-insert cutter

Hole milled by helical interpolation

The cutter follows a circular path and descends with each revolution. This mills a hole from 23 to 37 mm without a drill. At 30 mm, the entire bottom is smooth. At other diameters, a low cone up to 1.43 mm high remains at the center. Descend no more than 5 mm per revolution.

Copy milling a 3D surface with a round-insert cutter, scallop height 0.025 mm

3D shape – copy milling

The cutter follows parallel passes over the curved surface of a mold or die. Low scallops remain between passes. With a stepover of 1 mm, they are approximately 0.025 mm high: 1 × 1 ÷ (8 × insert radius 5 mm). Halving the stepover reduces scallop height to one quarter.

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Downward entry only by ramping or helical interpolation

At the cutter axis, the insert edge is 5 mm above the end face. Plunging straight down into solid material leaves a cone of material beneath the axis. At a depth of 5 mm, it contacts the body and overloads the inserts. Enter solid material by ramping or helical interpolation.

Starting cutting data and spindle speed calculation

Cutting speed, feed per tooth and depth by material group

The table provides conservative starting values for RDMW 1003 H6310 inserts. The feed per tooth applies to a depth of 1 mm and already includes a factor of 1.7 to compensate for chip thinning. Start with these values and increase them while monitoring the chips and spindle operation. Reduce the feed when slotting and during helical interpolation.

Workpiece materialCutting speed vc [m/min]Feed per tooth at a depth of 1 mm [mm]Depth [mm]
P Structural and alloy steel 130–200 0.17 0.5–5.0
M Stainless steel 70–130 0.10 0.5–2.5
K Cast iron 150–280 0.17 0.5–5.0

Spindle speed and feed calculation – steel, 150 m/min, depth 1 mm

At a depth of 1 mm, the cutter does not cut at its full diameter of 20 mm. Cutting diameter = 20 − 10 + √(10 × 10 − 8 × 8) = 16 mm. In the formula, 10 mm is the insert diameter, and 8 mm is the insert diameter minus twice the depth. Spindle speed = 1000 × cutting speed 150 m/min ÷ (3.14 × 16 mm) ≈ 2990 rpm. Feed rate = feed per tooth 0.17 mm × 2 inserts × 2990 rpm ≈ 1020 mm/min. Enter these two values in the machine program.

Calculating spindle speed using the full diameter of 20 mm gives approximately 2390 rpm. The cutting edge then runs approximately 20 percent slower than intended. For shallow cuts, always calculate using the cutting diameter.

RDMW 1003 inserts – selection and replacement

Insert designation, grade and screw tightening torque

The cutter accepts RD.. 1003 round inserts according to ISO 1832. R indicates a round insert, and D indicates a 15° clearance angle. The number 10 denotes an insert diameter of 10 mm, and 03 denotes a thickness of approximately 3.18 mm. The letter W in RDMW indicates a hole with a chamfer for a countersunk screw head.

InsertWorkpiece material
RDMW 1003 MO H6310 Horn steel, stainless steel; occasionally cast iron

Horn is a Korean insert brand offered in our store. Smoxh allows any ISO-compliant RD.. 1003 insert to be used in this cutter.

Insert indexing and replacement

A round insert cuts around its entire circumference rather than along a single edge. When a section of the edge wears out, loosen the M3.5x8 screw with a Torx T15 key. Rotate the insert by several tens of degrees until a fresh section engages. Before installation, clean chips out of the seat – a chip under the insert causes runout. Tighten the screw to the 2.7 N·m torque specified by Smoxh.

Cutter for RDMW 1003 round inserts viewed obliquely from the end face – insert, Torx T15 screw and flute
Cutter for RDMW 1003 round inserts viewed obliquely from the end face – insert, Torx T15 screw and flute

The drawing shows the milling head viewed obliquely from the end face. The insert sits in a seat in the body, with a Torx T15 screw passing through its center. A flute runs in front of the insert, carrying chips away from the cutting edge. The second insert sits on the opposite side, rotated by 180°.

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Cutter without internal coolant

The body has no coolant channel. Clear chips from pockets and holes with a stream of coolant or compressed air from the machine nozzle. A chip left in a pocket is cut again by the cutter, damaging the insert edge.

Ø20 mm indexable end mill for Ø10 mm round inserts Smoxh RD1003 combines a cutter for flat surfaces, slots and holes with a copy milling cutter. It uses two RDMW 1003 inserts and cuts to a depth of up to 5 mm. It is most productive with shallow cuts at a high feed rate. It mills holes from 23 to 37 mm by helical interpolation.

Questions about the RD1003 D20 round-insert cutter

Inserts, holes, depth, cutter selection

ISO RD.. 1003 round inserts with a diameter of 10 mm, e.g., RDMW 1003 MO H6310 from the Korean brand Horn. The insert is secured with an M3.5x8 screw with a Torx T15 recess, tightened to 2.7 N·m.

A hole from 23 to 37 mm. At 30 mm, the entire bottom is smooth. At 23 mm and 37 mm, a cone approximately 1.43 mm high remains at the center of the bottom; at 25 mm and 35 mm, it is approximately 0.67 mm high.

Up to 5 mm per pass, which is half the insert diameter. Machine deeper shapes in layers. A depth of approximately 1 mm with a higher feed rate provides the highest productivity.

Choose a round-insert cutter for 3D shapes, radiused transitions and rapid stock removal with shallow passes. Choose a 90° cutter with APKT inserts for square shoulders and sharp corners at the bottom.

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End mill RD1003 D20 W20 L120 Z-2 Smoxh

End mill RD1003 D20 W20 L120 Z-2 Smoxh

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