Kollmorgen TT-2953-3058-A DC Servo Motor (Industrial Standard Grade)

I. Product Overview

TT-2953-3058-A (Standard Model: TT-2953-3058-A) is a brushed DC servo motor in the Inland TT series of Kollmorgen. It has a built-in coaxial analog tachogenerator. This model is of NEMA 34 frame, 90VDC power supply, 4.5Nm rated torque, 2000rpm maximum speed, IP54 protection, optical shaft, an industrial-grade sealed standard precision drive unit. It focuses on high stability, low-speed smooth operation, analog tachogenerator feedback, long-life carbon brushes, compact and reliable design, and is specifically designed for precision positioning, low-speed smooth operation, and analog servo closed-loop industrial automation scenarios. 

II. Model Code Analysis (TT-2953-3058-A)

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

2953:

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

53: Motor length code (standard length rotor, medium power / standard torque configuration)

3058:

30: Armature winding specification (30th low-voltage winding, 90VDC rated voltage)

58: Tachometer generator specification (58th standard sensitivity, low ripple analog tachometer feedback)

A:

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

III. Core Technical Parameters

(1) Electrical Parameters (DC Servo)

Rated Voltage: 90VDC (compatible with 80~100VDC wide voltage)

Continuous Stall Torque: 4.5Nm

Peak Torque: 13.5Nm (3× overload, short time)

Continuous Current: 15.8A

Peak Current: 47.4A

Torque Constant (Kt): 0.285Nm/A

Reverse Electromotive Force Constant (Ke): 2.8V/1000rpm

Armature Resistance: 0.22Ω

Armature Inductance: 0.28mH

Rated Speed: 1800rpm

Maximum Speed: 2000rpm

Regulation Method: Gold-plated composite brush (low sparks, long life)

Insulation Class: F Class (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: 2.8V/1000rpm (±1% linearity)

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

Linearity: ±0.5% (full speed range)

Output Impedance: <160Ω

(3) Mechanical Parameters

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

Shaft Diameter: 16mm (precision optical shaft, no keyway, high concentricity)

Rotor Inertia: 0.00075kg·m² (low inertia, high dynamic response)

Overall Weight: 3.0kg

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

Mechanical Life: ≥12,000 hours (rated conditions)

Cooling Method: Natural convection (no fan)

(4) Environment and Connection

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

Operating Temperature: -20℃ ~ +60℃

Storage Temperature: -40℃ ~ +85℃

Connectors: 2× industrial circular connectors

Power: 4 pins (armature +, armature -, PTC, ground)

Feedback: 4 pins (tachometer +, tachometer -, brush monitoring, ground)

Certifications: CE, UL, cURus

IV. Core Product Characteristics

NEMA 34 standard series servo

85mm standard flange body output 4.5Nm continuous torque, suitable for medium-light load precision positioning, low-speed smooth operation industrial equipment.

Low-speed ultra-smooth performance

Optimized for 90VDC low voltage, 2000rpm maximum speed, low-speed (<10rpm) operation with zero pulsation, ultra-smooth, supports ultra-low-speed precision positioning, constant tension control.

Stable analog tachometer feedback

58th specification tachometer, 2.8V/krpm standard output, pure analog signal, never loses data, perfectly compatible with old analog servo controllers, without bus system.

Long-life reliable design Precious metal composite brushes have a lifespan of **≥8,000 hours**, with simple maintenance and quick on-site replacement.

Industrial-grade standard interface

NEMA 34 standard installation, 16mm optical shaft, 90VDC, IP54 protection, highly versatile, plug-and-play, directly replaceable with industrial motors of the same series.

V. Typical application scenarios

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

Simulated servo systems: retrofit of old industrial servo systems, closed-loop analog control, high-reliability without bus scenarios

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 90VDC analog DC servo drives

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

Maintenance: Brushes can be replaced on-site quickly, supporting precise grinding of commutators, extending the lifespan of the entire machine

Comparison selection: Compared with TT-2952-4051-A (115VDC), lower voltage, lower speed, smoother operation at low speeds; compared with TT-29530-3145-A (NEMA 42), smaller size, lighter weight, suitable for medium and light loads

VII. Product advantages summary

TT-2953-3058-A is a NEMA 34, 90VDC, 4.5Nm, 2.8V/krpm simulated speed measuring, IP54, F-class insulation, precision optical shaft, industrial-grade reliable standard power DC servo. Core advantages: ultra-smooth operation at low speeds, high stability, stable analog speed measurement, long lifespan, standard industrial interface, high concentricity of precision optical shaft. Perfectly meets the requirements of industrial-grade precision, medium and light loads, smooth operation at low speeds, and analog closed-loop control for equipment drives. It is the preferred industrial-grade drive for upgrading old industrial servo systems and precision automation equipment.