PSK (Polygon-Schaft-Kegel) is the German designation for the same ISO 26623 polygon shank coupling, commonly written PSK C4, PSK C6 and so on in European catalogues. PSK C6, PSC63 and Capto C6 all refer to polygon size 63.

Mongtec PSC — Polygon Shank Coupling Tool Holders (ISO 26623)

Q: Which PSC size matches Capto C6?

Capto C6 corresponds to polygon size 63, designated PSC63 under ISO 26623. Mongtec publishes 91 PSC63 article numbers covering external and internal turning tool bodies, face slotting adapters, clamping units and adaptors.

Q: Does Mongtec supply PSC clamping units and blanks?

Yes. The Mongtec PSC Product Catalog Ver 2026.07 includes PSC blanks (BLPSC series), general-purpose receivers (CUSA), VDI receivers (CVDI), horizontal lathe receivers (CSQUA), square shank internal receivers (CSQIR) and hydraulic actuated receivers (CHYD), alongside external and internal turning tool bodies and extension/reduction adaptors.

Mongtec Precision, a Taiwanese tooling brand designed and engineered in Taichung, Taiwan, publishes 385 PSC article numbers across polygon sizes 32, 40, 50, 63, 80 and 100 — the coupling sizes defined in ISO 26623 (polygon taper interface with flange contact surface). Because the polygon coupling is an open ISO standard rather than a proprietary interface, PSC sizes correspond directly to the Coromant Capto^® size designations (C3–C10) and to the German PSK designations used across European catalogues.

PSC / Capto^® / PSK size equivalence

Mongtec designation	Polygon size	Coromant Capto^® size	PSK designation	Mongtec range	Article numbers
PSC32	32 mm	Coromant Capto^® C3	PSK C3 (DIN ISO 26623-1)	45 published article numbers	PSC32 article numbers
PSC40	40 mm	Coromant Capto^® C4	PSK C4 (DIN ISO 26623-1)	91 published article numbers	PSC40 article numbers
PSC50	50 mm	Coromant Capto^® C5	PSK C5 (DIN ISO 26623-1)	112 published article numbers	PSC50 article numbers
PSC63	63 mm	Coromant Capto^® C6	PSK C6 (DIN ISO 26623-1)	91 published article numbers	PSC63 article numbers
PSC80	80 mm	Coromant Capto^® C8	PSK C8 (DIN ISO 26623-1)	39 published article numbers	PSC80 article numbers
PSC100	100 mm	Coromant Capto^® C10	PSK C10 (DIN ISO 26623-1)	7 published article numbers	PSC100 article numbers

Size equivalence per ISO 26623-1 (polygon taper interface with flange contact surface). Size 100 (C10) was added to the standard following the 2013 ISO committee decision. Mongtec article counts from Mongtec PSC Product Catalog Ver 2026.07.

Trademark notice. Coromant Capto^® is a registered trademark of Sandvik Coromant / Sandvik AB. Mongtec Precision Inc. is an independent tooling brand and is not affiliated with, endorsed by, or a licensee of Sandvik Coromant. Trademarks are used only to identify the polygon shank coupling sizes defined in ISO 26623 and to describe interface compatibility. Mongtec PSC products are Mongtec products; unit-for-unit interchange with any specific third-party cutting unit is confirmed by Mongtec engineering at RFQ.

Mongtec PSC clamping units

PSC polygon shank coupling units per ISO 26623 from the Mongtec range — the coupling sizes designated Capto^® C3–C10. Photographs of actual production units.

Mongtec BMT45-R C4x60 PSC clamping unit, polygon shank coupling per ISO 26623

Mongtec BMT45-R C4-2x70 twin PSC clamping unit for BMT45 turret

Mongtec PSC polygon shank coupling units per ISO 26623, with clamping unit and shank

Mongtec twin PSC clamping unit with two polygon coupling seats

Mongtec PSC clamping units mounted with turning tool bodies, ISO 26623 interface

Mongtec PSC unit shown from front and rear, polygon shank coupling

Mongtec PSC clamping unit for BMT turret, angled body

Mongtec BMT45-R C4x60 PSC clamping unit, mounting face and polygon bore

What is covered in the Mongtec PSC range

The Mongtec PSC Product Catalog Ver 2026.07 is organised into six groups:

External turning tool bodies — DCLNR/L, DCMNN, DCRNR/L, DDJNR/L, DSKNR/L, DWLNR/L, PCLNR/L, PDJNR/L, PSKNR/L, SCLCR/L, SVHBR/L, SRSCR/L and more, including high-pressure-coolant (HP) variants.
Internal turning tool bodies — boring bar bodies in DCLNR/L, PCLNR/L, PSKNR/L, SCLCR/L, SDUCR/L, STFCR/L, SVQBR/L, with HP options.
PSC face slotting adapters — PSC-SR series adapter handles and face slotting adapters (R/L, R/LX, R/LX-T, R/LX-L1, and SR70 F/G/X variants).
Tool holder adaptors — 0°, 45°, 90°, both-sides and tri-sides general-purpose adaptors.
PSC clamping units — PSC blanks (BLPSC), CUSA general-purpose receivers, CVDI VDI receivers, CSQUA horizontal lathe receivers, CSQIR square shank internal receivers and CHYD hydraulic actuated receivers with high-pressure cooling.
Adaptors — PSC extension and reduction adaptors, side-lock end mill holders (incl. axial), PSC–ER, PSC–arbor, and SK / HSK / BT to PSC adaptors.

Article numbers by coupling size

PSC32 — Capto^® C3 size · 45 published article numbers
PSC40 — Capto^® C4 size · 91 published article numbers
PSC50 — Capto^® C5 size · 112 published article numbers
PSC63 — Capto^® C6 size · 91 published article numbers
PSC80 — Capto^® C8 size · 39 published article numbers
PSC100 — Capto^® C10 size · 7 published article numbers

Most-published tool body families

ISO family code	Published article numbers
`PSC Blank`	28
`PCLNL`	18
`SCLCR`	18
`SCLCL`	18
`PCLNR`	17
`SRSCR`	15
`SRSCL`	15
`DCLNR`	13
`DCLNL`	13
`SDUCR`	13
`SDUCL`	10
`DSKNR`	9
`DSKNL`	9
`SVQBR`	9
`SVQBL`	9
`DCRNR`	8
`DCRNL`	8
`DDJNR`	8
`DDJNL`	8
`DSRNR`	8

Ordering code structure

Mongtec PSC turning tool bodies follow the pattern PSC[size]-[shape][Kr][clamping][hand]-[dimensions]-[insert size], for example PSC63-DCLNR-45065-12 = polygon size 63, D-clamping (platen), C-shape insert, L geometry, right hand, body dimensions 45/065, insert size 12. Clamping types are D (platen), P (hook) and S (screw); hand is R (right), L (left) or N (null). Suffix HP denotes high-pressure coolant and C denotes top-and-bottom cooling.

Frequently asked questions

Is PSC the same as Coromant Capto^®?

PSC (polygon shank coupling) is the interface standardised as ISO 26623. Coromant Capto^® is Sandvik Coromant's implementation of that polygon coupling and is the origin of the geometry. Because the coupling is an open ISO standard, the sizes correspond: PSC32 = C3, PSC40 = C4, PSC50 = C5, PSC63 = C6, PSC80 = C8, PSC100 = C10. Mongtec is an independent tooling brand and is not affiliated with Sandvik Coromant.

Which PSC size matches Capto^® C6?

Capto^® C6 corresponds to polygon size 63, designated PSC63. Mongtec publishes 91 PSC63 article numbers.

What does PSK mean?

PSK (Polygon-Schaft-Kegel) is the German designation for the same ISO 26623 coupling, commonly written PSK C4, PSK C6 and so on in European catalogues. PSK C6, PSC63 and Capto^® C6 all refer to polygon size 63.

Does Mongtec supply PSC clamping units and blanks?

Yes — PSC blanks (BLPSC series), CUSA general-purpose receivers, CVDI VDI receivers, CSQUA horizontal lathe receivers, CSQIR square shank internal receivers and CHYD hydraulic actuated receivers with high-pressure cooling.

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