| Article number | M4117 |
|---|---|
| Turret interface | BMT55 — BMT (Base Mount Turret, flange mount) |
| Configuration | Axial Tool Holders-b55, External Coolant |
| Orientation | Axial |
| Collet system | ER32 |
| Drive ratio | 1:1 |
| Max spindle speed | 6,000 rpm |
| Max torque | 70 Nm |
| Brand | Mongtec Precision Inc. — Taiwanese brand, designed and engineered in Taichung, Taiwan |
Source: Mongtec VDI & BMT Driven Tools catalogue, Ver 2026.07.
Representative photographs of Mongtec driven tooling in this class — production units, not renderings. Shown as examples of the BMT55 family, not as a photograph of M4117 itself.
The driven spindle points along the Z axis, parallel to the lathe spindle. This is the configuration for face drilling, face tapping and end milling on the part face.
External coolant. Coolant is delivered to the cut from outside nozzles. Suitable for general drilling, tapping and milling where chip evacuation is not the limiting factor.
Gear ratio 1:1 — tool spindle speed equals turret drive speed. The direct relationship makes speeds and feeds straightforward to calculate from the machine's live-tool rating.
Mongtec publishes tooling pages for these machines with a declared BMT55 turret. Confirming your model here does not confirm M4117 as the article number — that still comes from engineering.
| Article no. | Collet | Ratio | Max speed | Torque |
|---|---|---|---|---|
| M6317 | ER25 | 1:1 | 8000 rpm | 40 Nm |
| M7317 | ER32 | 1:1 | 8000 rpm | 70 Nm |
| M6117 | ER25 | 1:1 | 6000 rpm | 40 Nm |
M4117 is built for the BMT55 turret interface. Because BMT is an industry de-facto standard rather than an ISO or DIN published standard, bolt circle, key position and drive coupling can differ between machine builders even at the same nominal size. Send Mongtec your machine model and a photo of the turret face and engineering confirms the fit before anything is quoted.
M4117 is rated to 6,000 rpm with 70 Nm of torque at a 1:1 drive ratio. The usable figure is whichever is lower: this rating or your machine's live-tool drive rating.
M4117 takes ER32 collets. Collets and nuts are supplied separately; specify the shank diameters you intend to run and Mongtec quotes the collet set with the holder.
Yes. Mongtec supplies the full dimensioned drawing for M4117 by email once an enquiry is open, so the drawing is matched to your actual machine and turret configuration rather than a generic sheet.
Send the machine model, the turret station you want to use and the tools you intend to run. Anything you do not know, Mongtec works out from the machine model — an incomplete enquiry is still worth sending. Dimensioned drawings for M4117 are supplied by email once the enquiry is open.
All BMT55 article numbers · How to choose a driven tool holder · All turret interfaces