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.

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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 headquartered in Taichung, Taiwan, publishes 947 PSC article numbers, live (driven) and static, and the range keeps growing. They cover 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.

Quick answer — PSC polygonal live tools and static tools

PSC polygonal live tools: eight driven (live) holders that bolt to a BMT turret and end in a PSC32 or PSC40 polygon coupling to ISO 26623, so a live station takes the same pre-set PSC assemblies as the static stations. See the live PSC table.
PSC polygonal static tools: clamping units and blanks, external turning tool bodies and all PSC turning tool bodies by ISO 5608 style, PSC32 to PSC100.
ISO 26623: the open standard for the polygon taper coupling with flange contact. Sizes 32, 40, 50, 63, 80 and 100 correspond to Capto^® C3–C10.
For a quote: send the machine model, the turret or spindle interface and the part number you use now — enquiry form.

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

Request a PSC quote → Browse 357 PSC tool bodies →

Choosing between PSC and HSK-T for a mill-turn spindle? See PSC (Capto) vs HSK-T.

Send your machine model, turret interface and the part number you use now — we reply within one working day.

The PSC range

Each group below has its own page with the ISO 26623 coupling sizes and article numbers.

PSC extensions, reducers and side-lock tool bodiesMongtec

PSC extensions, reducers and side-lock tool bodiesMongtec PSC extension and reduction adaptors plus side lock end mill holders, ISO 26623, 137 article numbers with…VIEW SPECIFICATION →

PSC clamping units and blanksMongtec PSC clamping units and receivers: general purpose, VDI, horizontal lathe, square shank internal and…VIEW SPECIFICATION →

PSC external turning tool bodiesMongtec

PSC external turning tool bodiesMongtec PSC external turning tool bodies to ISO 26623: 381 article numbers across platen, hook and screw clamping.VIEW SPECIFICATION →

PSC face slotting adaptersMongtec

PSC face slotting adaptersMongtec PSC face slotting adapters, SR16 to SR70 serrated interface, ISO 26623.VIEW SPECIFICATION →

PSC internal turning tool bodiesMongtec

PSC internal turning tool bodiesMongtec PSC internal turning tool bodies to ISO 26623: 202 article numbers with Dmin, D1, f1, l1 and l3 as printed…VIEW SPECIFICATION →

Mongtec PSC100 — Polygon Size 100 Article Numbers (Capto® C10 size)Mongtec

Mongtec PSC100 — Polygon Size 100 Article Numbers (Capto® C10 size)7 published Mongtec PSC100 article numbers. Polygon size 100 per ISO 26623 — the Coromant Capto C10 and PSK C10…VIEW SPECIFICATION →

Mongtec PSC32 — Polygon Size 32 Article Numbers (Capto® C3 size)Mongtec

Mongtec PSC32 — Polygon Size 32 Article Numbers (Capto® C3 size)45 published Mongtec PSC32 article numbers. Polygon size 32 per ISO 26623 — the Coromant Capto C3 and PSK C3…VIEW SPECIFICATION →

Mongtec PSC40 — Polygon Size 40 Article Numbers (Capto® C4 size)Mongtec

Mongtec PSC40 — Polygon Size 40 Article Numbers (Capto® C4 size)91 published Mongtec PSC40 article numbers. Polygon size 40 per ISO 26623 — the Coromant Capto C4 and PSK C4…VIEW SPECIFICATION →

Mongtec PSC50 — Polygon Size 50 Article Numbers (Capto® C5 size)Mongtec

Mongtec PSC50 — Polygon Size 50 Article Numbers (Capto® C5 size)112 published Mongtec PSC50 article numbers. Polygon size 50 per ISO 26623 — the Coromant Capto C5 and PSK C5…VIEW SPECIFICATION →

Mongtec PSC63 — Polygon Size 63 Article Numbers (Capto® C6 size)Mongtec

Mongtec PSC63 — Polygon Size 63 Article Numbers (Capto® C6 size)91 published Mongtec PSC63 article numbers. Polygon size 63 per ISO 26623 — the Coromant Capto C6 and PSK C6…VIEW SPECIFICATION →

Mongtec PSC80 — Polygon Size 80 Article Numbers (Capto® C8 size)Mongtec

Mongtec PSC80 — Polygon Size 80 Article Numbers (Capto® C8 size)39 published Mongtec PSC80 article numbers. Polygon size 80 per ISO 26623 — the Coromant Capto C8 and PSK C8…VIEW SPECIFICATION →

Mongtec PSC turning tool bodies by ISO 5608 styleMongtec

Mongtec PSC turning tool bodies by ISO 5608 style357 Mongtec PSC (ISO 26623 polygon shank) turning tool body article numbers across 50 ISO 5608 tool styles…VIEW SPECIFICATION →

Driven (live) PSC tool holders — BMT turret mount, PSC32 / PSC40 output

The Mongtec PSC range is not only static. Mongtec also publishes eight driven (live) tool holders that bolt to a BMT turret and end in a PSC polygon coupling to ISO 26623, so a live station carries the same pre-set PSC assemblies as the static stations. Axial units drive along the Z axis (face drilling, tapping, end milling); radial units drive across it (cross drilling and milling).

Article number	Turret interface	Orientation	PSC output	Max speed	Max output torque	Coupling clamping torque	Coolant
M0407	BMT45	Axial	PSC32	6,000 rpm	25 Nm	35 Nm	EC
M8307	BMT45	Radial	PSC32	6,000 rpm	25 Nm	35 Nm	EC & TC
M7517	BMT55	Axial	PSC32	6,000 rpm	25 Nm	35 Nm	EC
M0817	BMT55	Radial	PSC32	6,000 rpm	25 Nm	35 Nm	EC & TC
M1257	BMT40	Axial	PSC40	6,000 rpm	32 Nm	45 Nm	EC & TC
M4176	BMT60	Axial	PSC40	6,000 rpm	32 Nm	45 Nm	EC
M9327	BMT65	Axial	PSC40	6,000 rpm	32 Nm	45 Nm	EC
M2427	BMT65	Radial	PSC40	6,000 rpm	32 Nm	45 Nm	EC

Source: Mongtec VDI & BMT Driven Tools catalogue, Ver 2026.3. All units are 1:1 drive ratio. Output torque and coupling clamping torque are separate figures. EC = external coolant, TC = through coolant. BMT is an industry de-facto standard, not an ISO or DIN standard: bolt circle, key position and drive coupling can differ between machine builders at the same nominal size, so fit is confirmed against the actual turret drawing at RFQ.

Static PSC tooling for these outputs: PSC32 and PSC40 article numbers. All BMT and VDI driven tool holders: driven tool holders by turret interface.

Send your machine model and a turret photo →

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 twin PSC clamping unit with two polygon coupling seats

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

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

The six size pages list 385 article numbers. The full catalogue table further down, which also includes items grouped by tool style rather than by size, lists 947.

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

Article-number tables — 947 published

Every article number in the Mongtec PSC catalogue, with the dimensions the catalogue prints for it. Where the catalogue itself misprints a value we could not verify, the cell is left blank and marked to confirm at RFQ — nothing is filled in by inference.

Page	Article numbers	Covers
External turning tool bodies	381	Overview · split by clamping type
— Platen clamp (D)	164	Fast insert change, high rigidity
— Hook clamp (P)	111	Flat seat, good chip flow
— Screw clamp (S)	106	Lowest profile, least interference
Internal turning tool bodies	202	Dmin · D1 · f1 · l1 · l3
Face slotting adapters	67	SR16 to SR70 serrated interface
Clamping units and blanks	56	CUSA · CVDI · CSQUA · CSQIR · CHYD
Extension, reduction and side lock	137	PSC to PSC · SLN · SLNE
ER, Arbor, SK, HSK and BT adaptors	104	PSC to other interfaces

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.

What to send for a quote

Mongtec confirms fit and quotes from four details. Email them to info@mongtec.com or use the quote form — we reply within one working day.

Machine make and full model, as shown on the machine nameplate.
Turret interface (for example PSC63 / Capto C6, or the turret the clamping unit mounts on).
The part number you use now, or a photo of the nameplate on the holder you are replacing.
Quantity.

Request a quote →

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.

Request PSC cross-reference & quote

Angle heads for machining centres

Mongtec publishes 137 right-angle machining head models — BT30, BT40 and BT50 spindle interfaces, with ER collet, DC chuck, FMB face-mill arbor and BT40 tool-holder outputs.