Alps Tool column sourced from alpstool.com/www/products/mt/lathe-tool/nicemill/features/ (AR Collet Chuck System technical page), accessed 2026-07-10 (Alps Tool Co., Ltd., Nagano Prefecture, Japan). Mongtec column sourced from mongtec-tools.com/en-US/p291-collet-changing-tools-and-clamping-heads, accessed 2026-07-10.
| Spec | Alps Tool AR Collet Chuck System | Mongtec Quick-Change Collet Chucks (SK series) | Compatibility Level |
|---|---|---|---|
| Interface Standard | 16° taper collet, DIN 6499 / ISO 15488, series AR8–AR50, holders per Alps Tool's own ECH spindle-nose spec | SK-series quick-change coupling; clamping heads and toolholder interchange system | Both serve the quick-change collet/clamping category for CNC lathes; different clamping mechanisms (spring collet vs. quick-change chuck), not a verified part-for-part match. |
| Clamping Range | Ø0.3 – Ø34mm across AR8–AR50, each collet covering roughly 0.2–2.0mm of gripping range depending on size | Depends on specific SKU; clamping range confirmed per order | |
| Runout Accuracy | Published in 3 accuracy classes (A / AA / AAA) in micrometers by size; e.g. AR20 A-class listed at approx. 13–14μm at 4×d measuring position | ≤0.003mm (3μm) runout on Mongtec's driven/clamping tooling lines generally; SK-series figure confirmed per SKU | |
| Recommended Nut Torque | 10 N·m (AR8) up to 140 N·m (AR50), by collet size | Not published for this general category page |
| 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 Alps 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.
Alps Tool manufactures in Nagano Prefecture, Japan. Mongtec ships from Taiwan and quotes lead time per order after reviewing the specific interface, clamping range, and any customization — there is no single published lead-time figure to compare against Alps Tool's at this time. Request a cross-reference quote below for a project-specific lead time.
Alps Tool reports approximately 340 employees and ¥8.19 billion in FY2021 revenue on its own company outline page, and lists major OEM customers including Star Micronics, DMG Mori Seiki, Okuma, Citizen Machinery, and Yamazaki Mazak (alpstool.com/www/company/outline/, accessed 2026-07-10). Mongtec is Taiwan-based, with clamping head and collet chuck lines matched to specific machine platforms (mongtec-tools.com/en-US/p291-collet-changing-tools-and-clamping-heads, accessed 2026-07-10).
Alps Tool's AR system is a spring-collet mechanism with a wide size range and three published accuracy classes, giving buyers fine control over precision-versus-cost tradeoffs at the collet level. Mongtec's SK-series is a quick-change clamping-head system with a different mechanical principle. A like-for-like cost comparison between the two mechanisms has not been performed for this page.
Mongtec's quick-change collet chuck and clamping-head line is documented at mongtec-tools.com/en-US/p291-collet-changing-tools-and-clamping-heads (accessed 2026-07-10), with clamping range and runout confirmed per SKU. Alps Tool's own AR collet chuck technical page publishes a 16° taper collet conforming to DIN 6499 / ISO 15488, sizes AR8 through AR50 covering Ø0.3 to Ø34mm, three runout accuracy classes (A/AA/AAA) measured in micrometers, and a recommended nut-tightening torque table from 10 N·m to 140 N·m by size (alpstool.com/www/products/mt/lathe-tool/nicemill/features/, accessed 2026-07-10). A specific fit-and-function verification between Mongtec's SK-series clamping heads and an Alps Tool AR-equipped holder is confirmed by Mongtec engineering on request.
If a Alps 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. If the unit is repairable, see Alps repair.
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.