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Carbide insert RCMT 1003 MO H6310 Horn - Carbide insert circular
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  • Carbide insert RCMT 1003 MO H6310 Horn - Carbide insert circular
  • Carbide insert RCMT 1003 MO H6310 Horn - Carbide insert circular - nr. 1
Horn

Carbide insert RCMT 1003 MO H6310 Horn

Horn Horn
637219
€5.18 tax inc.

Net price: €4.21

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

Description

RCMT 1003 turning insert – round indexable insert

Technical data
Insert diameter d 10 mm
Insert thickness s 3.18 mm
Hole diameter d1 3.4 mm
Round RCMT 1003 turning insert made of H6310 cemented carbide, single-sided with a central mounting hole and chip breaker

Cutting data for the RCMT 1003 insert for steel and stainless steel

finishing, semi-finishing and roughing — ISO P and M groups

MaterialFinishingSemi-finishingRoughing
Vc [m/min]Feed f [mm/rev]ap [mm]Vc [m/min]Feed f [mm/rev]ap [mm]Vc [m/min]Feed f [mm/rev]ap [mm]
PSteel 200-295 0.06 1 170-240 0.25 2.5 150-215 0.32 4
MStainless steel 110-230 0.06 1 70-175 0.25 2.5 50-135 0.32 4

Round H6310 carbide indexable insert – applications and design

single-sided round insert with a hole and chip breaker

The RCMT 1003 turning insert is a round, single-sided indexable insert made of H6310 grade cemented carbide, designed for turning steel and stainless steel. Shape R is a complete circle without corners — the entire peripheral edge serves as the cutting edge. The positive geometry with a 7° clearance angle, designated by the letter C, reduces cutting resistance and facilitates smooth entry into the material. The insert uses one side, and the countersunk hole allows it to be secured with a central screw in the tool holder pocket. The round profile distributes the load over a long section of the edge, slowing edge wear during form turning and copy turning. The PVD coating of grade H6310 protects the carbide against abrasion and high temperatures, covering ISO groups P20-P40 and M20-M40. The insert diameter is 10 mm and its thickness is 3.18 mm. Tolerance class M ensures repeatable cutting edge positioning in the pocket after each indexing operation.

Key advantages of the grade H6310 round cemented carbide insert

  • Round cutting edge — the absence of corners and multiple indexing positions obtained by rotating the insert in its pocket extend cutting edge life.
  • Grade H6310 for ISO groups P and M — PVD-coated carbide: steel (P20-P40) and stainless steel (M20-M40), occasionally also cast iron.
  • Positive 7° geometry — lower cutting resistance and power requirements than negative inserts.
  • The countersunk hole allows secure clamping with a central screw in tool holders with a round pocket.
  • Round shape designed for form turning, copy turning and profiling arcs and blend radii.
  • The long contact line distributes heat and mechanical loads, allowing machining at higher feed rates.

Round insert applications and cutting data selection

The RCMT 1003 insert (also written without spaces as rcmt1003) is suitable for form turning, copy turning and radius profiling, where the round edge accurately reproduces rounded workpiece transitions. Calculate spindle speed using the formula n = 1000·Vc/(π·D): for a shaft with a diameter of 50 mm at Vc = 200 m/min, the result is approximately 1273 rpm. Keep the depth of cut below half the insert radius to limit radial forces and system vibration. The thin chips typical of a round insert allow higher feed rates without the risk of edge chipping. For stainless steel, operate within 50–230 m/min with a constant feed rate and continuous coolant supply to counteract work hardening of the material being cut. Once one section is worn, simply rotate the insert in its pocket to expose a fresh section of the edge. In roughing, the round insert removes substantial stock while maintaining a strong cutting edge; in finishing, it leaves a smooth surface thanks to smooth chip flow. H6310 grade indexable inserts are supplied by the Korean brand Horn.

▲
Application limitation

The round edge provides a long contact line and increased radial forces — stable operation requires a rigid machine tool and secure workpiece clamping. On slender, poorly supported shafts, limit the depth of cut to avoid vibration and workpiece deflection.

Round insert designation decoder according to ISO 1832

how to read the RCMT 1003 code — positions 1–6 of the designation

Designation RCMT 1003 according to the standard ISO 1832: 4 letters describe geometry and construction, 2 numeric codes describe dimensions. Each field has a number, an icon, and a brief description.

ISO 1832 designation decoder — how to read the code

1Rshape 2Cangle α 3Mtolerance 4Ttype – 510diameter 603thickness

Positions 1–4 · ISO code

1RShape

Round

peripheral edge without corners

2CClearance angle

α = 7°

positive, single-sided

3MTolerance

Class M (intermediate)

IC ±0.08 · thickness ±0.13 mm

4TType

Countersunk hole + chip breaker

countersink 40–60°, single-sided chip breaker

Positions 5–6 · dimensions [mm]

510Diameter

d = 10 mm

round insert — full radius

603Thickness

s = 3.18 mm

between rake faces

✓ Peripheral edge — full circle, no corners

Full designation: RCMT 1003 = round · positive 7° · class M · countersunk hole and chip breaker · Ø 10 mm · s 3.18 mm

Compatible turning tools

tool holders with a round 10 pocket — external form turning

SRDCN 1616 H1016×16 × 100 mmNeutral
↔
SRDCN 2020 K1020×20 × 125 mmNeutral
↔
SRDCN 2525 M1025×25 × 150 mmNeutral
↔
SRDCN 3232 P1032×32 × 170 mmNeutral
↔
SRGCR/L 1616 H1016×16 × 100 mmR right-hand
←L left-hand
→
SRGCR/L 2020 K1020×20 × 125 mmR right-hand
←L left-hand
→
SRGCR/L 2525 M1025×25 × 150 mmR right-hand
←L left-hand
→
SRGCR/L 3232 P1032×32 × 170 mmR right-hand
←L left-hand
→

Frequently asked questions about the RCMT 1003 insert

use, turning tool selection, and turning parameters

Round insert has no distinct corners — the entire peripheral edge serves as the cutting edge. It is single-sided, so once one section is worn, rotate it slightly in its pocket to expose a fresh section of the edge, obtaining several working positions on one side.

External turning tool holders with a round pocket: SRDCN in a neutral version and SRGCR/L in right-hand and left-hand versions, with cross sections from 16×16 to 32×32 mm. The choice of right-hand or left-hand version depends on the feed direction and access to the workpiece contour.

For form turning, copy turning and profiling arcs and blend radii — the round edge accurately reproduces rounded transitions. The long contact line also allows higher feed rates, making the insert suitable for rough profiling on rigid machine tools.

Yes — grade H6310 covers group ISO M20-M40. Maintain a cutting speed of 50–230 m/min, a constant feed, and continuous emulsion cooling: austenitic steel conducts heat poorly and work-hardens when cutting is too slow.

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Carbide insert RCMT 1003 MO H6310 Horn

Carbide insert RCMT 1003 MO H6310 Horn

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