Kollmorgen TT-2950-3055-R DC Servo Motor (Industrial Class High Torque)

I. Product Overview

TT-2950-3055-R is a high-power brushed DC servo motor from Kollmorgen Inland TT series, equipped with a high-sensitivity coaxial tachometer generator. This model is a standard industrial drive unit with NEMA 42 frame, 115VDC power supply, 18.5Nm rated torque, 3000rpm maximum speed, IP54 protection, keyway shaft, industrial connectors, featuring high torque density, low inertia high dynamics, analog tachometer feedback, long life and reliability, designed specifically for heavy precision machine tools, industrial robots, large-scale automation equipment, analog servo closed-loop and other industrial-grade heavy-load high-precision scenarios.

II. Model Code Interpretation (TT-2950-3055-R)

TT: Kollmorgen DC Servo Motor + Built-in Coaxial Tachometer Generator Standard Series

2950:

29: Frame Diameter Base Code (2.95 inches level, corresponding to NEMA 42 standard, 110mm × 110mm)

50: Motor Length Code (Standard Long Rotor, High Power / High Torque Configuration)

3055:

30: Armature Winding Specification (30th Medium-High Voltage Winding, 115VDC Rated Voltage)

55: Tachometer Generator Specification (55th High Sensitivity, Low Ripple Analog Tachometer Feedback)

R:

Installation / Shaft / Protection / Connection: R-type standard flange installation, keyway shaft, IP54 protection, industrial circular connector, with thermal protection

III. Core Technical Parameters

(1) Electrical Parameters (DC Servo)

Rated Voltage: 115VDC (Compatible with 90~130VDC)

Continuous Power: 5.5kW (Natural Cooling)

Continuous Stalling Torque: 18.5Nm

Peak Torque: 55.5Nm (3× Overload, Short Time)

Continuous Current: 52A

Peak Current: 156A

Torque Constant (Kt): 0.356Nm/A

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

Armature Resistance: 0.08Ω

Armature Inductance: 0.12mH

Rated Speed: 2500rpm

Maximum Speed: 3000rpm

Regulation Method: Gold-plated Brushes (Long Life, Low Spark)

Insulation Class: F Grade (155℃)

Thermal Protection: Built-in PTC Thermistor (Over Temperature Protection at 155℃)

(2) Tachometer Parameter

Feedback Type: Coaxial DC Tachometer Generator (Pure Analog, No Electronic Components)

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 42 (110mm × 110mm Flange)

Shaft Diameter: 19mm (Standard 6×6×25mm Keyway, Optical Shaft)

Rotor Inertia: 0.0012kg·m² (Low Inertia, High Dynamic Response)

Overall Weight: 4.8kg

Bearings: Double Row Precision Ball Bearings

Mechanical Life: ≥15,000 Hours (Rated Conditions)

Cooling Method: Natural Convection (No Fan)

(4) Environment and Connection

Protection Grade: IP54 (Dustproof, Splashproof 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 42 high-torque industrial servo

110mm standard flange body with an output of 18.5Nm continuous torque, 5.5kW high power, suitable for heavy precision equipment, large load positioning, high thrust drive scenarios.

Low inertia high dynamic performance

Rotor inertia is only 0.0012 kg·m², torque response <1ms, maximum 3000rpm, strong acceleration/deceleration capability, suitable for rapid reciprocating, high dynamic positioning, frequent start-stop industrial automation systems.

Stable analog speed measurement feedback

55 specification speed sensor, 3.6V/krpm standard output, pure analog signal, no power supply required, never loses data, perfectly compatible with old-fashioned analog servo controllers, without bus systems.

Long-life reliable design

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

Industrial standard interfaces

NEMA 42 standard installation, 19mm keyway shaft, 115VDC, IP54 protection, highly versatile, plug-and-play, directly replaceable with the same series industrial motors.

VII. Typical Application Scenarios

Heavy precision machine tools:龙门铣床， coordinate boring machine， large grinding machine， heavy dividing head

Industrial robots： large joint drive， heavy-duty mechanical arm， handling robot

Automation equipment： packaging machinery， printing equipment， textile machinery， metal processing equipment

Simulated servo system： retrofit of old industrial servo， closed-loop control of analog quantity， highly reliable without bus system

Special industries： semiconductor equipment， medical imaging， detection instruments (heavy load high precision)

VIII. Accessories and Selection Suggestions

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

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

Maintenance： Brushes can be replaced on-site， supports commutator grinding， extends service life

Comparison selection： Compared with TT2931 series， torque increases by 256%， power increases by 22 times， it is the standard NEMA 42 industrial heavy-load simulated servo model

IX. Summary of Product Advantages

TT-2950-3055-R is a NEMA 42， 115VDC， 18.5Nm， 5.5kW， 3.6V/krpm simulated speed measurement， IP54， F-class insulation， industrial-grade reliable standard high-power DC servo. Core advantages： high torque， high power density， low inertia high dynamics， stable analog speed measurement， long life， standard industrial interfaces. Perfectly meets the drive requirements of industrial heavy-load， high precision， high dynamics， simulated closed-loop heavy equipment， is the preferred industrial drive for upgrading old industrial servo and large-scale automation equipment.