Kollmorgen TT-2952-4051-A DC Servo Motor (Industrial Precision Grade)

I. Product Overview

TT-2952-4051-A is a brushed DC servo motor in the Inland TT series of Kollmorgen. It is equipped with a high-sensitivity coaxial analog tachometer generator. This model is of NEMA 34 frame, 115VDC power supply, 7.5Nm rated torque, 3000rpm maximum speed, IP54 protection, optical shaft, a standard precision drive unit with industrial-level sealing, featuring high torque density, low inertia high dynamics, analog tachometer feedback, long-life precious metal brushes, industrial-level stability and reliability, and is specifically designed for precision machine tools, industrial robots, automation equipment, analog servo closed-loop and other high-precision industrial scenarios.

II. Model Code Interpretation (TT-2952-4051-A)

TT: Kollmorgen DC servo motor + standard series with built-in coaxial tachometer generator

2952:

29: Frame diameter base code (2.95-inch level, corresponding to NEMA 34 standard, 85mm×85mm)

52: Motor length code (medium-long rotor, medium power / medium torque configuration)

4051:

40: Armature winding specification (40-number medium-voltage winding, 115VDC rated voltage)

51: Tachometer generator specification (51-number standard sensitivity, low ripple analog tachometer feedback)

A:

Installation / Shaft / Protection / Connection: A-type standard flange installation, precision optical shaft (without key slots), IP54 protection, industrial circular connector, built-in thermal protection

III. Core Technical Parameters

(1) Electrical Parameters (DC Servo)

Rated Voltage: 115VDC (compatible with 90~130VDC wide voltage)

Continuous Power: 2.2kW (natural cooling)

Continuous Stalling Torque: 7.5Nm

Peak Torque: 22.5Nm (3× overload, short time)

Continuous Current: 21A

Peak Current: 63A

Torque Constant (Kt): 0.357Nm/A

Reverse Electromotive Force Constant (Ke): 3.6V/1000rpm

Armature Resistance: 0.15Ω

Armature Inductance: 0.22mH

Rated Speed: 2800rpm

Maximum Speed: 3000rpm

Regulation Method: Precious metal composite brushes (low sparks, long life)

Insulation Class: F Grade (155℃)

Thermal Protection: Built-in PTC thermistor (over-temperature protection at 155℃)

(2) Tachometer Generator (Tach) Parameters

Feedback Type: Coaxial DC tachometer generator (pure analog, no electronic components, no power supply required)

Output Sensitivity: 3.6V/1000rpm (±1% linearity)

Output Ripple: <2.0% (peak-to-peak)

Linearity: ±0.5% (full speed range)

Output Impedance: <150Ω

(3) Mechanical Parameters

Frame Size: NEMA 34 (85mm×85mm flange)

Shaft Diameter: 16mm (precision optical shaft, without key slots, high concentricity)

Rotor Inertia: 0.00085kg·m² (low inertia, high dynamic response)

Overall Weight: 3.2kg

Bearings: Double-row precision ball bearings (resistant to vibration, long life)

Mechanical Life: ≥15,000 hours (rated conditions)

Cooling Method: Natural convection (no fan)

(4) Environment and Connection

Protection Grade: IP54 (dust-proof, splash-proof water)

Operating Temperature: -20℃ ~ +60℃

Storage Temperature: -40℃ ~ +85℃

Connectors: 2× industrial circular connectors

Power: 4 pins (armature +, armature -, thermistor, ground) Feedback: 4 channels (speed measurement +, speed measurement -, brush monitoring, ground)

Certification: CE, UL, cURus

IV. Core Product Features

NEMA 34 precision servo

85mm standard flange body with 7.5Nm continuous torque output, 2.2kW power, suitable for precise positioning and high dynamic response industrial equipment with medium load.

Low inertia high dynamic performance

Rotor inertia is only 0.00085 kg·m², torque response < 1ms, maximum 3000rpm, acceleration/deceleration extremely fast, suitable for rapid reciprocating, high precision positioning, and frequent start-stop automated systems.

Stable analog speed measurement feedback

Model 51 speed sensor, 3.6V/krpm standard output, pure analog signal, never loses data, perfectly compatible with old-fashioned analog servo controllers, without bus system.

Long-life reliable design

Precious metal composite brushes, life ≥ 8,000 hours, smooth operation at low speed, zero pulsation, supports ultra-low speed (< 5rpm) precise positioning.

Industrial standard interface

NEMA 34 standard installation, 16mm optical shaft, 115VDC, IP54 protection, highly versatile, plug-and-play, directly replaceable with the same series of industrial motors.

V. Typical Application Scenarios

Precision machine tools: CNC lathes, grinders, milling machines, electrical discharge machining machines, precision dividing heads

Industrial robots: Small and medium-sized joint drives, mechanical arms, handling robots, assembly robots

Automation equipment: Packaging machinery, printing equipment, textile machinery, semiconductor equipment

Analog servo systems: Retrofit of old industrial servo systems, closed-loop control with analog signals, highly reliable without bus system

Special industries: Medical imaging, testing instruments, laser equipment, precision positioning platforms

VI. Accessories and Selection Suggestions

Compatible drivers: Kolmos Goldline, B-600, AX-3000; third-party 115VDC analog DC servo drives

Recommended cables: 4×2.5mm² (power), 4×0.75mm² (feedback), shielded twisted pair

Maintenance: Brushes can be replaced quickly on-site, supports precise grinding of commutators, extends the overall machine lifespan

Comparison selection: Compared to TT2931 series, torque increases by 88%, power increases by 8.8 times; compared to TT2950 series, volume is reduced by 30%, weight is reduced by 33%, it is the standard NEMA 34 industrial precision analog servo standard model

VII. Summary of Product Advantages

TT-2952-4051-A is a NEMA 34, 115VDC, 7.5Nm, 2.2kW, 3.6V/krpm analog speed measurement, IP54, F-class insulation, precision optical shaft, industrial-grade reliable standard power DC servo. Core advantages: high torque density, low inertia high dynamics, stable analog speed measurement, long life, standard industrial interface, high concentricity of precision optical shaft. Perfectly meets the drive requirements of industrial-grade precision, medium load, high dynamics, analog closed-loop equipment, is the preferred industrial-grade drive for upgrading old industrial servo systems and precision automation equipment.