Mongtec M4146 – VDI25 Radial Driven Tool Holder, ER25

M4146 is a radial driven (live) tool holder for the VDI25 turret interface, using ER25 collets, rated to 6,000 rpm and 20 Nm. Mongtec Precision is a Taiwanese brand, designed and engineered in Taichung, Taiwan.

Specification

Article number	M4146
Turret interface	VDI25 — VDI per DIN 69880 (cylindrical shank)
Configuration	Radial Tool Head, FOR Radial Disc
Orientation	Radial
Collet system	ER25
Drive ratio	1:1
Max spindle speed	6,000 rpm
Max torque	20 Nm
Brand	Mongtec Precision Inc. — Taiwanese brand, designed and engineered in Taichung, Taiwan

Mongtec driven tool holder with high-pressure coolant connections

Mongtec driven tool holder with drive shank and coupling shown separately

Representative photographs of Mongtec driven tooling in this class — production units, not renderings. Shown as examples of the VDI25 family, not as a photograph of M4146 itself.

What M4146 does on the machine

The driven spindle points at 90° to the lathe spindle, along the X axis. This is the configuration for cross drilling, cross tapping and slotting on the outside diameter.

Radial-disc mounting — mounts to the turret's radial disc rather than a standard station.

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.

Do not order against the label alone. “VDI25” fixes the shank per DIN 69880, but pocket depth, clamping system and drive coupling still vary between machine builders. Send Mongtec your machine model and a photograph of the turret face — engineering checks M4146 against the actual turret drawing before anything is quoted. That check is free and takes one email.

Machines with a VDI25 turret

Mongtec publishes tooling pages for these machines with a declared VDI25 turret. Confirming your model here does not confirm M4146 as the article number — that still comes from engineering.

Other VDI25 holders in the same configuration

Related VDI25 configurations

Frequently asked

What machines does the Mongtec M4146 fit?

M4146 is built for the VDI25 turret interface. Because VDI shank dimensions follow DIN 69880, but turret pocket depth, clamping system and drive coupling still vary between machine builders. Send Mongtec your machine model and a photo of the turret face and engineering confirms the fit before anything is quoted.

What speed and torque can M4146 run?

M4146 is rated to 6,000 rpm with 20 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.

What collet does M4146 take?

M4146 takes ER25 collets. Collets and nuts are supplied separately; specify the shank diameters you intend to run and Mongtec quotes the collet set with the holder.

Is a dimensioned drawing available for M4146?

Yes. Mongtec supplies the full dimensioned drawing for M4146 by email once an enquiry is open, so the drawing is matched to your actual machine and turret configuration rather than a generic sheet.

Get M4146 quoted

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 M4146 are supplied by email once the enquiry is open.

Mongtec M4146 — VDI25 radial driven tool holder