Mongtec Precision, a Taiwanese tooling brand headquartered in Taichung, Taiwan, supplies SK-series quick-change collet chucks and clamping heads for CNC turning on the same industry-standard SK clamping-head geometry used by Hainbuch GmbH’s SPANNTOP® and TOPlus® programs. Mongtec’s line covers back-pull dead-length, push-forward zero-axial-movement, and mini dead-length chuck types, with clamping modules replaced in seconds via a patented quick-change mechanism. Whether a specific Mongtec clamping head is dimensionally interchangeable with a specific Hainbuch chuck (or vice versa) is confirmed by Mongtec engineering through a signed cross-reference at RFQ — see the table below.
This is the practical difference. Mongtec SK-series clamping heads mount in a Hainbuch-compatible chuck, and a Hainbuch-type SK head mounts in a Mongtec chuck — the SK clamping-head geometry is an open size standard, not a proprietary one. A shop already running Hainbuch chucks can add Mongtec heads without replacing the chuck, and a shop moving to Mongtec chucks keeps the heads it already owns. Head size class and jaw form are confirmed against your drawing before quoting.
| Hainbuch Product Family | Mongtec Model / Series | Shared Geometry / Standard | Compatibility Level | Changeover | Lead Time | Catalog Link |
|---|---|---|---|---|---|---|
| SPANNTOP® nova (dead-length collet chuck) | SK Back-Pull Collet Chuck – Dead Length Type | SK clamping-head geometry (industry standard) | Confirmed per RFQ cross-check | Clamping module replaced in seconds (Mongtec published) | Quote on request | Mongtec SK Back-Pull |
| TOPlus® (hexagonal clamping geometry chuck) | SK Push-Forward Collet Chuck – Zero Axial Movement Type | SK clamping-head geometry (industry standard); TOPlus hexagonal head geometry is Hainbuch-proprietary | Confirmed per RFQ cross-check for SK-geometry heads; no claim for TOPlus hexagonal heads | Clamping module replaced in seconds (Mongtec published) | Quote on request | Mongtec SK Push-Forward |
| SPANNTOP® mini / TOPlus® mini | SK Mini Back-Pull Collet Chuck – Dead Length Type | SK clamping-head geometry (industry standard) | Confirmed per RFQ cross-check | Clamping module replaced in seconds (Mongtec published) | Quote on request | Mongtec SK Mini |
| Hainbuch clamping heads (Spannkopf) for SPANNTOP-type chucks | Collet Changing Tools and Clamping Heads (SK series) | SK clamping-head geometry (industry standard) | Confirmed per RFQ cross-check | — | Quote on request | Mongtec Clamping Heads |
| centroteX® S / M quick-change interface (chuck-to-spindle) | No direct equivalent – contact engineering | centroteX is a Hainbuch-proprietary spindle interface | No direct equivalent | — | — | Contact Mongtec engineering |
| Turret interface | Axial (0°) | Radial (90°) |
|---|---|---|
| VDI16 | M0195 (ER16), M1096 (ER11), M3095 (ER11) | M2095 (ER11), M4095 (ER11), M5095 (ER16), M6095 (ER11), M7095 (ER11) |
| VDI20 | M2006 (ER20), M2106 (ER20), M3106 (ER16), M4106 (ER20) | M3006 (ER16), M5006 (ER16), M5106 (ER16), M6106 (ER10), M7106 (ER20) |
| VDI25 | M2046 (ER20), M5146 (ER25), M7046 (ER20), M8046 (ER20) | M3046 (ER20), M4146 (ER25) |
| VDI30 | M0716 (ER25), M1116 (ER25), M1816 (ER25), M2016 (ER20), M2026 (ER32), M2116 (ER25), all 30 → | M0116 (ER25), M0316 (ER25), M0416 (ER25), M0816 (ER25), M1416 (ER25), M1716 (ER25), all 28 → |
| VDI40 | M0726 (—), M0926 (ER32), M1126 (ER32), M1826 (ER32), M2326 (ER32), M2426 (ER32), all 36 → | M0126 (ER32), M0166 (ER32), M0326 (ER32), M0426 (ER32), M0526 (ER32), M0626 (ER25), all 37 → |
| VDI50 | M2036 (ER40), M2136 (ER40), M4036 (ER40), M5236 (ER40), M6036 (ER40) | M0136 (ER40), M0236 (ER40), M1136 (ER40), M3136 (ER40), M4136 (ER40), M5036 (ER40), all 11 → |
| VDI60 | M1056 (ER50), M7056 (ER50), M8056 (ER50) | — |
| BMT40 | M1257 (—) | — |
| BMT45 | M0407 (—), M6007 (ER25), M7001 (ER25), M7014 (ER25), M9407 (ER25) | M2007 (ER25), M3307 (ER25), M8007 (ER20), M8307 (—) |
| BMT55 | M1817 (ER25), M4117 (ER32), M6117 (ER25), M6317 (ER25), M7317 (ER32), M7517 (—), all 7 → | M0317 (ER25), M0717 (ER32), M0817 (—), M1117 (ER25), M1317 (ER32), M2317 (ER25), all 14 → |
| BMT60 | M4176 (—) | — |
| BMT65 | M3227 (ER32), M3427 (ER40), M4027 (ER32), M7427 (ER32), M9327 (—) | M0227 (ER32), M1227 (ER40), M2427 (—), M2527 (ER32), M5127 (ER32), M6227 (ER32), all 8 → |
| BMT75 | M1037 (ER32), M1137 (ER40), M3037 (ER40), M5037 (ER40), M7037 (ER40), M7137 (ER40) | — |
| BMT85 | M0047 (ER50), M4047 (ER50), M5047 (ER50), M7047 (ER50) | — |
Send the Hainbuch part number together with your machine model and turret — Mongtec engineering maps it to the matching Mongtec article number at quotation. The check is free.
Hainbuch manufactures in Marbach, Germany. Mongtec is headquartered in Taichung, Taiwan and quotes lead time per order after reviewing the chuck type, clamping-head size, and any customization — there is no single published lead-time figure to compare against Hainbuch’s at this time. Request a cross-reference quote below for a project-specific lead time.
Mongtec is Taiwan-based, with quick-change collet chucks and clamping heads engineered and inspected in-house, plus a customized service for non-standard clamping requirements (mongtec-tools.com/en-US/plist6-quick-change-collet-chucks, accessed 2026-07-17).
Because Mongtec’s SK-series chucks accept industry-standard SK-geometry clamping heads, shops running mixed fleets can consolidate clamping-head inventory across chucks after an engineering cross-check — instead of maintaining separate proprietary head stocks per chuck brand. A like-for-like cost comparison depends on the specific unit and has not been performed for this page.
Mongtec’s SK-series chucks use a taper positioning / guided locking mechanism with high-rigidity structure for uniform clamping force (mongtec-tools.com/en-US/plist6-quick-change-collet-chucks, accessed 2026-07-17). For any cross-brand pairing — a Mongtec clamping head in a Hainbuch-compatible chuck, or a Hainbuch-type SK head in a Mongtec chuck — Mongtec engineering confirms head geometry, size (e.g. SK size class), pull-back/dead-length behavior, and clamping-force compatibility against the customer’s machine and workpiece before any compatibility level is assigned on this page.
If a Hainbuch unit on your machine is worn, damaged or discontinued, you do not need the original article number to replace it. Send the model number, the name plate photo, or the drawing of the clamping head or quick-change chuck you run today — Mongtec engineering cross-references the mounting, coupling and output geometry and quotes a suitable Mongtec article, stating clearly which dimensions were confirmed. Repair of the existing unit is sometimes the better answer; where we see that, we say so.
Mongtec publishes this comparison so buyers can judge the swap themselves. It is not a claim that one brand is better than the other — the two are different companies with different ranges, and the right choice depends on the machine and the job.
Send it to info@mongtec.com or use the enquiry form. A drawing or a photo of the unit on the turret speeds this up; neither is required to start.
Request a Clamping-Head Cross-Reference Quote
A quick-change clamping fixture earns its price in changeover time, not in the purchase order. Mongtec supplies rubber-vulcanised SK clamping fixtures, internal expansion fixtures, hydraulic fixtures for machining centres, and the collets and expansion sleeves that go in them. Collets change in about 10 seconds, expansion sleeves in about 30. Mongtec Precision is a Taiwanese brand headquartered in Taichung, Taiwan.
Every Mongtec quick-change clamping fixture now has its own page with clamping range, clamping force, body dimensions and maximum speed — SK external clamping, HJ / HN / HK internal expansion, HMC machining-centre hydraulic, HG / HM gear fixtures.