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Description
TPKN 1603 milling insert – triangular insert for 90° milling heads
| Technical data | |
|---|---|
| Side length l | 16.5 mm |
| Insert thickness s | 3.18 mm |
| Inscribed circle diameter IC | 9.525 mm |
| Entering angle κ | 90° |
| Geometry | positive, 11° clearance |
| Cutting direction | right-hand (R) |
| ANSI code | TPK 32 |
Cutting data for the TPKN indexable insert for steel and stainless steel
90° shoulder milling with a milling head featuring a TPKN pocket — ISO P and M groups
| Material | Vc [m/min] | Feed fz [mm/tooth] | ap [mm] | ae [% D] |
|---|---|---|---|---|
| PSteel | 130–200 | 0.10–0.20 | 1.0–4.0 | 30–70 |
| MStainless steel | 70–130 | 0.06–0.15 | 0.5–2.0 | 25–60 |
Positive MTC cemented carbide insert – design and applications
single-sided triangle without a hole, with a wiper land, PDSR suffix
This PDSR milling insert is a single-sided, triangular indexable insert made of cemented carbide in grade MTC from the Korean brand Horn. The design without a hole or chip breaker is secured by a top clamp or wedge, making it suitable for shoulder milling heads and cutters with a ninety° entering angle. Positive geometry with an eleven° clearance angle reduces cutting forces, while the ground wiper land at the corner improves the machined surface finish. The grade MTC is intended for steel and stainless steel; coating details should not be stated without the manufacturer's data sheet. The insert covers groups ISO P (steel) and ISO M (stainless steel).
Key advantages of the triangular indexable insert
- Three cutting edges — the triangular, single-sided design provides 3 working corners; once an edge is worn, rotate the insert in its pocket without replacing the milling head.
- MTC grade for ISO P and M groups — carbide for steel and stainless steel, in line with the Horn product family's application range.
- Wiper land at the corner — the ground edge improves the surface finish and allows a higher feed per tooth.
- Positive geometry with a 11° clearance angle reduces cutting forces and power consumption during 90° shoulder milling.
- Design without a hole or chip breaker — top clamping, with simple and quick replacement in the milling head pocket.
- Physical dimensions according to GOST 27302-87: side 16.5 mm, IC 9.525 mm, thickness 3.18 mm.
- ANSI code TPK 32 according to the separate ANSI B212.4 rule: the first digit is the inscribed circle diameter IC in 1/8″, and the second is the thickness in 1/16″.
Applications and cutting data selection for the milling insert
This insert PDSR is suitable for face and shoulder milling in structural steels, cast steel and stainless steel on milling machines and CNC machining centers. Calculate the milling head speed using n = 1000·Vc/(π·D): for a head diameter of 63 mm at Vc = 150 m/min, the result is approximately 758 rpm. With five inserts in the body and a feed per tooth fz of 0.15 mm, the table then advances at approximately 569 mm/min. For stainless steel, maintain a cutting speed of 70–130 m/min and use coolant to limit work hardening of the layer being cut.
Three cutting edges reduce the cost per corner, and the letter R in the code indicates a right-hand version whose orientation must match the milling head pocket. The wiper land allows a higher feed without increasing surface roughness, but keep the feed per revolution below sixty percent of this edge's width. The absence of a hole limits tool holder selection to milling heads with top or wedge clamping, so check the pocket type in the face mill before purchasing.
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Application limitation
Grade MTC covers groups ISO P (steel) and ISO M (stainless steel); for other material groups, select a grade confirmed by the manufacturer. The insert has no hole — it is secured by a top clamp or wedge and requires a milling head with this pocket type.
Triangular insert designation decoder according to ISO 1832
how to read the TPKN 1603 PDSR code — designation positions 1–10
Designation TPKN 1603 PDSR according to the standard ISO 1832: 4 letters describe the geometry and construction, 2 numeric codes describe the dimensions, and the suffix PDSR — the wiper edge geometry. Each field has a number, an icon and a brief description.
ISO 1832 designation decoder — how to read the code
1Tshape 2Pangle α 3Ktolerance 4Ntype – 516size 603thickness – 7Pangle κ 8Dland α′ 9Sedge 10Rhand
Positions 1–3 · ISO code
1TShape
60° triangle
3 corners of 60° per side
2PClearance angle
α = 11°
positive, single-sided
3KTolerance
Class K (precision)
ground thickness ±0.025 mm
Positions 4–6
4NType
Without hole or chip breaker
clamp or wedge mounting
516Size
l = 16.5 mm
IC = 9.525 mm · 3/8″
603Thickness
s = 3.18 mm
between rake faces
PDSR suffix · wiper edge
7PEntering angle
κ = 90°
90° angle milling cutters and milling heads
8DWiper land
α′ = 15°
wiper land clearance angle
9SEdge condition
Chamfered and rounded
S-land — strongest edge
10RHand
Right-hand
standard clockwise spindle rotation
✓ 3 corners × 1 side = 3 cutting edges
Full designation: TPKN 1603 PDSR = triangle 60° · positive 11° · class K · without hole or chip breaker · IC 9.525 mm (l 16.5 mm) · s 3.18 mm · κ 90° · wiper land 15° · chamfered and rounded edge · right-hand (R)
Compatible milling heads and milling cutters
pockets with top clamping — 90° entering angle
Selecting a milling head for a triangular insert without a hole
| Rating | Milling head or application |
|---|---|
| ✓ | 90° clamp-on shoulder milling heads: Dolfamex 220.17 (Ø40–200 mm), Darmet FA90TP22 |
| ✓ | 90° milling heads with a clamp-on pocket matching dimensions of 16.5 × 9.525 × 3.18 mm |
| ✗ | 75° face milling heads designed for square inserts SPKN |
| ✗ | 45° face milling heads for inserts SEKN / SEAN / SEKR |
| ✗ | Other pockets without confirmed compatibility with a triangular insert without a hole |
Frequently asked questions about the TPKN 1603 insert
number of edges, PDSR designation, milling head selection and parameters
Three — the triangle has 3 corners, and the positive, single-sided geometry without a hole means that only the insert's top surface is used for cutting. Once a corner is dull, rotate the insert in its pocket to the next edge without replacing the milling head.
Four sub-positions: P = entering angle κ 90°, D = wiper land clearance angle 15°, S = chamfered and rounded edge, R = right-hand version. The PDSR variant has the same land as PDER — only the edge preparation differs.
Shoulder milling heads and cutters 90° with a TPKN pocket and top clamping. Typical models include Dolfamex 220.17 (Ø40–200 mm) and Darmet FA90TP22. It does not fit 75° milling heads for SPKN or 45° heads for SEKN, SEAN or SEKR.
For the group ISO M maintain a cutting speed of 70–130 m/min and a feed of 0.06–0.15 mm/tooth with coolant. Austenitic steel conducts heat poorly and work-hardens, so avoid excessively low speeds and interruptions in feed.
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| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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