Song Gia column sourced from https://www.songgia.com.tw/en/products/live-tools-for-cnc-lathes/bmt-series, accessed 2026-07-10 (SONG GIA INDUSTRIAL CO., LTD., Beitun District, Taichung City, Taiwan). Mongtec column sourced from Mongtec internal engineering spec sheet, verified 2026 (https://www.mongtec-tools.com/en-US/plist1-bmt-vdi-tool-holder, accessed 2026-07-10).
| Spec | Song Gia BMT Series | Mongtec BMT/VDI Driven Tool Holder | Compatibility Level |
|---|---|---|---|
| Interface sizes | BMT-45, BMT-55, BMT-65 (Doosan); BMT-44/BMT-55-equivalent (Nakamura WT-100/WY-100/WT-150/AS-200); M06/M08 (Tsugami) | BMT sizes per Mongtec catalog; confirm exact size against Song Gia's machine-brand designation | Same BMT size-naming convention for the Doosan-compatible sizes; confirm exact dimensions before treating as interchangeable |
| Coolant | Through-coolant direct to cutting point (internal channel) | Per Mongtec spec sheet; confirm coolant routing option at order | Comparable feature; confirm pressure rating with both suppliers |
| Bearing/precision class | P4-grade precision ball bearing (per Song Gia's live-tool product description) | Per Mongtec spec sheet | Comparable precision class; confirm exact runout spec with both suppliers |
| Origin | Taiwanese brand, Taichung, Taiwan | Taiwanese brand — designed & engineered in Taiwan | Both suppliers are Taiwan-based |
| Max rotational speed / torque | Not published on Song Gia's BMT category page; figures likely vary by specific machine-reference model | Not a standard published figure on Mongtec's public category page | Gap – confirm directly with both suppliers by exact machine reference before a speed/torque-critical order |
| 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 Song Gia (崧嘉實業) 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.
Song Gia manufactures in Taichung, Taiwan, the same city where Mongtec is headquartered, so for buyers already sourcing from Taiwan, lead-time differences between the two suppliers are typically driven by order volume, exact machine-reference match, and inventory position rather than country-of-origin freight time.
Song Gia Industrial Co., Ltd. was founded in 1991 and describes itself as a "designated partner" with TSUGAMI, MIYANO, and CINCOM, with its facility at No. 148, Songzhu 2nd Rd., Beitun District, Taichung City (source: https://www.songgia.com.tw/en/about/company, accessed 2026-07-10). Mongtec similarly supports customers directly from Taiwan with engineering-verified spec sheets, giving shops in the region two comparably local sourcing options for BMT-interface live tooling.
Song Gia's catalog is built almost entirely around machine-specific live tooling for Swiss-type and turret lathes (Tsugami, Citizen, Star, Miyano, Nomura, Nakamura, Doosan), which suits shops running those specific machine brands and needing an exact OEM-reference cross-match. Mongtec's BMT & VDI Driven Tool Holder line is organized by generic interface size rather than machine brand, which can simplify sourcing for shops that just need a standard BMT/VDI interface rather than an exact machine-brand part number.
Mongtec's BMT/VDI driven tool holder dimensions are drawn from Mongtec's internal engineering spec sheet, verified against the published category page at https://www.mongtec-tools.com/en-US/plist1-bmt-vdi-tool-holder (accessed 2026-07-10). Song Gia's published BMT interface sizes (BMT-45/55/65 for Doosan; equivalent designations for Nakamura and Tsugami machines) and design features (through-coolant, P4-grade bearings, Taiwan manufacturing) come directly from Song Gia's own product pages (accessed 2026-07-10). Because Song Gia organizes its catalog by machine-brand reference rather than a generic interface-size spec table, shops verifying an exact swap should provide their specific lathe model to both Song Gia and Mongtec and compare the resulting dimensional drawings directly.
If a Song Gia (崧嘉實業) 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 driven tool holder 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.