Servo Motors increase machine tool accuracy and quality.

Press Release Summary:

Respectively, QSY 260B and QSY 260C EcoDyn series offer stall torque of 85.0 Nm and 120.0 Nm, rated power of 12 or 10.8 kW and 16 or 14.4 kW, rated torque of 57.3 or 507.1 lb-in. and 76.4 or 676.2 lb-in., and rated current of 21.5 or 19.4 A and 28 or 25.2 A. Synchronous motors offer low torque ripple for speed stability and positioning accuracy. Rotor moment of inertia enables max acceleration and high load inertia. Rated speed is 2,000 min-1 in EcoDyn mode and max speed is 3,000 min-1.

Original Press Release:

New Powerful Servo Motors Now Available

SCHAUMBURG, IL — Expanding its offerings of synchronous motors, HEIDENHAIN Corporation introduces the new QSY 260B and QSY 260C EcoDyn series of servo motors with stall torque of 85.0 Nm and 120.0 Nm, respectively.  Of particular use on machine tools, these HEIDENHAIN motors provide low torque ripple which guarantee high speed stability and positioning accuracy, resulting in parts with superior surface quality.

With these new HEIDENHAIN servo motors, a high rotor moment of inertia provides for high maximum acceleration and high load inertia. Common applications for these motors types include large boring mills and other heavy load machining.

Motors of the EcoDyn series are characterized by reduced current consumption together with higher rated torque and a max. permissible rated speed of 3000 min–1.


QSY 260 B EcoDyn

QSY C EcoDyn

Rated power PN

12 kW / 10.8 kW

16 kW / 14.4 kW

Rated speed NN

2000 min-1 (in EcoDyn mode)

Rated torque MN1)

57.3 Nm / 51.6 Nm
507.1 in-lb / 456.7 in-lb

76.4 Nm / 68.8 Nm
676.2 in-lb / 608.9in-lb

Rated current IN1)

21.5 A / 19.4 A

28 A / 25.2 A

Stall torque M01)

85.0 Nm (752.3 in-lb)

120.0 Nm (1062.1 in-lb)

Stall current I01)

31.0 A

43.5 A

Max. speed nmax

3000 min-1 (in EcoDyn mode)

Max. torque Mmax2)

250 Nm (2212.7 in-lb)

360 Nm (3186.3 in-lb)

Max. current Imax2)

130 A

173 A

Weight m

62 kg (75 kg with brake)

74 kg (87 kg with brake)

1) At 100 K, 2) Max. 200 ms

These motor come standard equipped with either incremental or absolute HEIDENHAIN rotary encoders.

For more information, contact HEIDENHAIN’s Public Relations Manager Kathleen Stoneski at (847) 519-4702 ( or write to us at HEIDENHAIN CORPORATION, 333 E. State Parkway, Schaumburg, IL  60173.  HEIDENHAIN can also be accessed directly via our web site at

HEIDENHAIN CORPORATION is the North American subsidiary of DR. JOHANNES HEIDENHAIN GmbH, a leading international manufacturer of precision measurement and control equipment.  Our product line includes linear scales, rotary and angular encoders, digital readouts, digital length gages, CNC controls, and machine inspection equipment.

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