Kollmorgen TT-2953-4011-B DC Servo Motor (Medium-High Power Standard Class) I. Product Overview TT-2953-4011-B is a medium-high power brushed DC servo motor in the Inland TT series from Kollmorgen. It is equipped with a high-sensitivity coaxial analog tachometer generator. This model is a standard precision drive unit with a NEMA 34 frame, 115VDC power supply, 29.8Nm rated torque, 3000rpm maximum speed, IP54 protection, keyway shaft, industrial heavy-duty connector, and is characterized by high torque density, strong overload capacity, stable analog tachometer feedback, industrial-grade long lifespan, and high dynamic response. It is designed for medium-heavy precision positioning, rapid reciprocating, and high-reliability analog servo closed-loop industrial automation scenarios. II. Model Code Interpretation (TT-2953-4011-B) TT: Kollmorgen DC Servo Motor + Built-in Coaxial Tachometer Generator + Standard Series 2953: 29: Frame Diameter Base Code (2.95 inches level, corresponding to NEMA 34 standard, 85mm × 85mm) 53: Motor Length Code (Medium-long Rotor, Medium-High Power / High Torque Configuration) 4011: 40: Armature Winding Specification (40th High-Voltage Winding, 115VDC Rated Voltage) 11: Tachometer Generator Specification (11th High-Sensitivity, Low Ripple Analog Tachometer Feedback) B: Installation / Shaft / Protection / Connection: B-type standard flange installation, keyway shaft (19mm), IP54 protection, industrial circular heavy-duty connector, built-in dual PTC thermal protection III. Core Technical Parameters (1) Electrical Parameters (DC Servo) Rated Voltage: 115VDC (Compatible with 90~130VDC wide range) Continuous Stalling Torque: 29.8Nm (22lb-ft) Peak Torque: 89.4Nm (3× Overload, Short Time) Continuous Current: 21.4A Peak Current: 90.0A Torque Constant (Kt): 1.39Nm/A Reverse Electromotive Force Constant (Ke): 14.4V/1000rpm Armature Resistance: 0.28Ω Armature Inductance: 0.42mH Rated Speed: 2500rpm Maximum Speed: 3000rpm Regulation Method: Gold-plated Composite Brush (Ultra-long Life, Low Spark) Insulation Class: F Class (155℃) Thermal Protection: Built-in Dual PTC Thermistors (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: 14.4V/1000rpm (±1% Linearity) Output Ripple: <1.5% (Peak-to-Peak) Linearity: ±0.5% (Full Speed Range) Output Impedance: <120Ω (3) Mechanical Parameters Frame Size: NEMA 34 (85mm × 85mm Flange) Shaft Diameter: 19mm (3/4in) (Standard 6×6×25mm Keyway) Rotor Inertia: 0.0012kg·m² (Low Inertia, High Dynamic Response) Overall Weight: 4.8kg Bearings: Double Row Heavy-Duty 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) Operating Temperature: -20℃ ~ +60℃ Storage Temperature: -40℃ ~ +85℃ Connector: 2× Industrial Circular Heavy-Duty Connectors Power: 4 pins (armature +, armature -, thermal sensor 1, thermal sensor 2) Feedback: 4 pins (speed sensor +, speed sensor -, brush monitoring, ground) Certification: CE, UL, cURus Four. Core Product Features NEMA 34 high-torque heavy-duty servo 85mm standard flange body output 29.8Nm continuous torque, the highest torque level of NEMA 34 frame, suitable for medium-heavy precision positioning, large 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 heavy-load rapid reciprocation, high dynamic positioning, frequent start-stop automation systems. High-sensitivity analog speed feedback 11-pin specification speed sensor, 14.4V/krpm high output, pure analog signal, never loses data, ultra-low ripple, perfectly compatible with old-fashioned analog servo controllers, no bus high-reliability system. Super long life reliable design Heavy-duty precious metal composite brushes, life ≥10,000 hours, smooth low-speed operation, zero pulsation, supports ultra-low speed (<5rpm) precision positioning. Industrial heavy-duty standard interface NEMA 34 standard installation, 19mm keyway shaft, 115VDC, IP54 protection, heavy-duty connector, highly versatile, plug-and-play, directly replaceable with the same series industrial motors. Five. Typical Application Scenarios Precision machine tools: CNC milling machines, grinding machines, lathes, electrical discharge machining machines, precision rotary worktables Industrial robots: Small and medium-sized heavy-duty joint drives, mechanical arms, handling robots, assembly robots Automation equipment: Packaging machinery, printing equipment, textile machinery, semiconductor equipment, metal forming equipment Analog servo systems: Retrofitting of old-fashioned industrial heavy-duty servo, closed-loop control with analog quantity, highly reliable without bus scenarios Special industries: Medical imaging, testing instruments, laser equipment, precision positioning platforms Six. Accessories and Selection Suggestions Compatible drivers: Kolmos Goldline, B-600, AX-3000; third-party 115VDC heavy-duty analog DC servo drivers Recommended cables: 4×4mm² (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 life Comparison selection: Compared with TT-2953-3058-A (90VDC), torque increased by 562%, power increased by 480%; compared with TT-29530-3145-A (NEMA 42), smaller in size, lighter in weight, suitable for medium-heavy scenarios Seven. Product Advantage Summary TT-2953-4011-B is a NEMA 34, 115VDC, 29.8Nm, 14.4V/krpm high-sensitivity analog speed feedback, IP54, F-class insulation, heavy-duty keyway shaft, industrial-grade ultra-long life standard medium-large power DC servo. Core advantages: ultra-high torque density, low inertia high dynamics, stable analog speed feedback, ultra-long life, heavy-duty standard interface. Perfectly meets the drive requirements of industrial-grade medium-heavy, high precision, high dynamics, analog closed-loop equipment, is the preferred industrial-grade drive for retrofitting old-fashioned industrial heavy-duty servo and precision automation equipment.