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Learn How It Works!

A Tool Holder with Massive Appeal

The Self-Tuning Mass Damper™ (STMD™) features a tungsten carbide mass inside the tool. The mass is supported by polymer discs that have frequency-dependent stiffness. As cutting forces are applied to the tool, vibration occurs on a frequency band. To counteract such movement, the MAQ STMD™ self-adjusts to that frequency to maximize the mass damping effect.

The STMD™ is available in more than a dozen length-diameter combinations, as the table shows. To determine which product is right for you, view our Application Guide or our 2019 Catalogue.

Standard Tools


Art. Nr Description D (mm) L (mm) CAD Drawing STEP File DWG File
STMD™ M16-170 Tool Holder 16 170
STMD™ M20-200 Tool Holder 20 200
STMD™ M25-255 Tool Holder 25 255
STMD™ M32-320 Tool Holder 32 320


Art. Nr Description D (Inch) L (Inch) CAD Drawing STEP File DWG File
STMD™ I 5/8-6.7 Tool Holder 0.625 6.7
STMD™ I 3/4-7.9 Tool Holder 0.750 7.9
STMD™ I 1-10 Tool Holder 1.000 10.0
STMD™ I 1 1/4-12.6 Tool Holder 1.250 12.6

Cutter Heads

Art. Nr Description Dimension Notes
SDUCR-16-5/8 Cutter Head 16mm Fits 5/8"
SDUCR-20-3/4 Cutter Head 20mm Fits 3/4"
SDUCR-25-1 Cutter Head 25mm Fits 1"
SDUCR-32-1 1/4 Cutter Head 32mm Fits 1 1/4"
Art. Nr Description Dimension Notes
STFCR-16-5/8 Cutter Head 16mm Fits 5/8"
STFCR-20-3/4 Cutter Head 20mm Fits 3/4"
STFCR-25-1 Cutter Head 25mm Fits 1"
STFCR-32-1 1/4 Cutter Head 32mm Fits 1 1/4"


Note: Accessories are meant to replace lost or damaged spare parts. Most accessories are included with the related product. See product descriptions for details.

Art. Nr Description Dimension Notes
HDS-M3 Head Screw M3 Qty 10/bag
HDS-M4 Head Screw M4 Qty 10/bag
HDS-M5 Head Screw M5 Qty 10/bag
INS-M2.5 Insert Screw M2.5 Qty 10/bag
INS-M3.5 Insert Screw M3.5 Qty 10/bag
KEY-HDS-M3 Head Screw Key M3
KEY-HDS-M4 Head Screw Key M4
KEY-HDS-M5 Head Screw Key M5
KEY-INS-M2.5 Insert Screw Key M2.5
KEY-INS-M3.5 Insert Screw Key M3.5
PIN-4MM Pin head to holder 4mm Qty 10/bag
PIN-6MM Pin head to holder 6mm Qty 10/bag

According to tests conducted at a leading machine tool builder in March 2018, the MAQ STMD™ showed significantly less displacement than other tool holders and demonstrated superior versatility with respect to speeds, feeds, depth of cut and LD ratio.

Don't See Your Dimensions? Don't Worry

We’re working on expanding our portfolio of products. If you have a need for dimensions above or below those listed, or for a milling or holemaking application, please challenge us with your custom requirements.

By the numbers, the STMD™ can help you:

Und so kann STMD™ Ihre Kennzahlen verbessern:

Reduce Cycle
Time by

Verringerung der
Taktzeiten um



Reduce Tooling
Costs by

Verringerung der
Werkzeugkosten um


5 % bis 10 %

Reduce Energy Consumption by

Verringerung des
Energieverbrauchs um


2 % bis 3 %

Scrap by

Verringerung des
Ausschusses um


1 % bis 2 %

Given the high volume of machining operations, even the smallest percentage reductions can result in substantial savings. Tell us about your specific requirements, and we’ll offer you innovative solutions.

Angesichts des hohen Volumens an Bearbeitungsvorgängen können selbst kleinste prozentuale Verringerungen zu erheblichen Einsparungen führen. Senden Sie uns Ihre spezifischen Anforderungen und wir werden Ihnen innovative Lösungen anbieten.

Simplify Your Machining
with MAQ STMD™

Vereinfachen Sie die
Bearbeitung mit MAQ STMD™