LTI Luster LSMM13-100-4N-110: AC Spindle Motor Specs, Models & Availability

Technical Dossier

Product Details And Specifications

LTI Luster LSMM13 Series: Comprehensive Module Range and Technical Overview

The LTI Luster LSMM13 series represents a family of high-performance AC spindle motors engineered for precision-critical industrial applications. Manufactured by Lust Antriebstechnik GmbH (LTI), a German motion control specialist, the LSMM13 line has established a significant installed base across global heavy industry sectors including chemical processing plants, nuclear facility auxiliary systems, petroleum refinery drive trains, CNC machining centers, and paper mill winding systems. The series is characterized by its compact frame geometry, high dynamic torque output, and compatibility with LTI's CDA and CDSB series servo drives. Units in this family are rated for continuous duty cycles in thermally demanding environments, making them a reference-grade choice for OEM machine builders and end-user maintenance departments requiring long-term spare parts availability.

The Evolution of LSMM13 Architecture

The LSMM13 series traces its design lineage to LTI's earlier LSM (Linear/Synchronous Motor) platform developed in the late 1990s. The LSMM designation (Motor Module, Medium Frame) introduced a standardized flange interface (IEC 100/112 compatible) that allowed direct mechanical substitution across machine generations. Early LSMM13 variants used resolver-based feedback systems, which were later supplemented by incremental encoder and EnDat 2.1 absolute encoder options as CNC controller technology advanced. The -4N suffix in the LSMM13-100-4N-110 denotes a 4-pole winding configuration with natural convection cooling, while the -110 suffix identifies the shaft height and flange dimension class. Compatibility with LTI's CDSB3 and CDA3 drive families was maintained across hardware revisions, though firmware parameter sets (motor data sets) must be matched to the specific winding variant. As the LSMM13 series has entered its mature/end-of-life phase, LTI's current LSMM15 and LSMM17 frames are the designated forward migration path; however, direct mechanical and electrical substitution is not always possible without drive re-parameterization, making original LSMM13 spare units critical for installed-base maintenance.

LSMM13 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the LTI Luster LSMM13 series, organized by functional classification. Each model is a distinct winding or feedback variant within the same frame class.

AC Spindle / Synchronous Servo Motors — Standard Winding Variants

• LSMM13-050-4N-110: 5.0 Nm continuous torque, 4-pole, natural cooling, IEC 110 flange, resolver feedback standard.
• LSMM13-075-4N-110: 7.5 Nm continuous torque, 4-pole, natural cooling, IEC 110 flange, resolver or incremental encoder.
• LSMM13-100-4N-110: 10.0 Nm continuous torque, 4-pole, natural cooling, IEC 110 flange — primary stocking SKU for this frame class.
• LSMM13-100-4F-110: 10.0 Nm continuous torque, 4-pole, forced-air (fan) cooling variant, elevated duty cycle rating.
• LSMM13-130-4N-110: 13.0 Nm continuous torque, 4-pole, natural cooling, extended winding for higher peak torque applications.
• LSMM13-130-4F-110: 13.0 Nm continuous torque, 4-pole, forced-air cooling, suited for high-cycle CNC spindle duty.
• LSMM13-150-4N-110: 15.0 Nm continuous torque, 4-pole, natural cooling, upper range of the standard LSMM13 frame.
• LSMM13-150-4F-110: 15.0 Nm continuous torque, 4-pole, forced-air cooling, maximum continuous output in the -4F sub-series.

Feedback System Variants (Encoder / Resolver Options)

• LSMM13-100-4N-110-R: Standard resolver feedback variant; compatible with LTI CDA resolver interface cards.
• LSMM13-100-4N-110-E: Incremental encoder (1024 ppr) feedback variant; requires encoder evaluation board in drive.
• LSMM13-100-4N-110-A: Absolute EnDat 2.1 encoder variant; supports single-turn absolute positioning without homing cycle.
• LSMM13-075-4N-110-R: 7.5 Nm resolver variant; common replacement in older LTI CDA2-based systems.
• LSMM13-130-4N-110-E: 13.0 Nm incremental encoder variant; used in precision grinding machine spindles.

Special Frame / Shaft Configuration Variants

• LSMM13-100-4N-110-B5: B5 flange (face-mount) configuration; used in direct-drive pump and compressor couplings.
• LSMM13-100-4N-110-B14: B14 small flange variant; used in compact gearbox-integrated machine tool spindles.
• LSMM13-100-4N-110-SB: Shaft with keyway and brake option; used in vertical axis and gravity-load applications.

Sourcing Hard-to-Find & Obsolete LSMM13 Parts

The LSMM13 series is no longer in active production at LTI's primary manufacturing facilities. OEM lead times for new units, where available, can exceed 26 weeks. DriveKNMS maintains a dedicated inventory of new-old-stock (NOS), refurbished, and tested-serviceable LSMM13 units sourced through authorized distribution channels and controlled decommissioning programs. For end-users operating legacy CNC systems, paper machines, or process drives built around LSMM13 motors, DriveKNMS provides lifecycle extension support including: direct unit replacement with full test certification, winding resistance and insulation resistance (IR) verification reports, feedback device inspection and recalibration, and cross-reference advisory for migration to current LTI LSMM15/LSMM17 equivalents where mechanical adaptation is feasible. All units are shipped with full traceability documentation. Emergency same-day dispatch is available for critical production-down situations.

Quality Control for the LSMM13 Range

Each LSMM13 unit processed by DriveKNMS undergoes a structured inspection and functional test protocol specific to the series' design characteristics. The test sequence includes: (1) Visual inspection of stator housing, shaft seal, and connector interface for mechanical damage or corrosion ingress. (2) Winding resistance measurement across all three phases (U-V, V-W, W-U) with tolerance verification against LTI factory data sheets. (3) Insulation resistance test at 500 VDC between windings and frame (minimum 100 MΩ acceptance threshold). (4) Feedback device verification — resolver excitation and output signal check, or encoder signal integrity test at rated speed using a dedicated motor test bench. (5) No-load run test at rated voltage and frequency to confirm bearing condition, vibration signature (ISO 10816 Class II limits), and thermal stability. (6) Final parameter set verification against the specific LTI drive type the unit is destined for. All test results are documented and available to the customer upon request.