What is the maximum vertical load the MSR-50 can handle with its brake?

The electromagnetic brake provides a holding torque of 1.2Nm. With a 5mm lead ball screw, this translates to a maximum vertical holding force of 1507N (approximately 153kg). However, the rated load capacity of 50kg is limited by the linear guide and ball screw life. For vertical applications, we recommend a maximum payload of 40kg to maintain a safety factor of 1.5 on the brake and 2.0 on the screw. The brake engages automatically when power is cut and has a response time of 50ms. For loads exceeding 40kg, consider the MSR-80 with a larger brake (2.5Nm).

Can the MSR-50 be used in a dusty environment without additional protection?

The standard MSR-50 has an IP54 rating for the motor and rail, which means it is protected against dust ingress (limited ingress permitted) and splashing water. However, the ball screw and linear bearings are lubricated with lithium grease and are sensitive to abrasive dust. In environments with fine particles (e.g., woodworking, sandblasting), we strongly recommend the optional bellows cover (part number MSR-B50) and felt wipers on the carriage. Without these, dust can accelerate bearing wear and reduce life by up to 50%. For food processing or washdown areas, a stainless steel version (MSR-50SS) is available with IP65 rating.

What is the recommended maintenance schedule for the MSR-50?

Under normal operating conditions (8 hours/day, 50% duty cycle), re-lubricate the ball screw and linear guide every 500 hours of operation or every 3 months, whichever comes first. Use a lithium-based grease with NLGI grade 2 (e.g., Mobilux EP2). Inspect the wipers and bellows for damage every 250 hours. After 10,000 hours, replace the ball screw nut if backlash exceeds 0.05mm. The motor brushes (if using a brushed version) should be checked every 2,000 hours; however, the standard MSR-50 uses a brushless motor, which requires no brush maintenance. Keep the rail clean with a dry cloth; avoid solvent-based cleaners that can degrade the anodized coating.

Motorized Slide Rail

Model MSR-50: 50kg Load, 1000mm Stroke, ±0.1mm Repeatability

The MSR-50 motorized slide rail is a linear motion module engineered for precision automation tasks requiring up to 50kg payload capacity and 1000mm travel. It integrates a 24V DC brushless motor with a recirculating ball screw (16mm diameter, 5mm lead) and a hardened linear guide rail, delivering repeatable positioning within ±0.1mm.

Load Capacity

50kg

Repeatability

±0.1mm

Motor Voltage

24V DC

Rail Material

Aluminum Alloy 6063-T5

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How Does the MSR-50 Motorized Slide Rail Handle 50kg Payloads with ±0.1mm Accuracy?

The MSR-50 motorized slide rail is a self-contained linear actuator built around a 16mm ball screw with a 5mm lead, directly coupled to a 24V DC brushless motor. The rail itself is a 6063-T5 aluminum alloy extrusion with a hard-anodized surface (HV 400), and the carriage rides on four preloaded linear ball bearings. This combination yields a load capacity of 50kg at the center of the carriage, a maximum speed of 100mm/s, and bidirectional repeatability of ±0.1mm over the full 1000mm stroke. The ball screw is preloaded to eliminate axial play, and the motor includes an electromagnetic brake (holding torque 1.2Nm) for vertical applications. The unit is IP54-rated when fitted with optional bellows, making it suitable for dusty workshop environments.

In automated storage and retrieval systems, the MSR-50 excels at transferring totes weighing up to 40kg between conveyor levels, where its 100mm/s speed and 0.1mm repeatability ensure precise docking with transfer stations. For CNC machine enclosures, the rail supports safety doors weighing 30-45kg, opening and closing within 1.2 seconds while withstanding coolant splash and chips. Medical equipment designers use it for patient positioning tables and imaging gantries, where low vibration (<0.5mm/s RMS at 50mm/s) and quiet operation (<55dB) are mandatory. The 24V DC motor is compatible with standard stepper or servo drives, and the integrated encoder (1000ppr) provides closed-loop control for applications requiring torque monitoring or stall detection.

Compared to the MSR-30 (30kg capacity, 600mm stroke) and MSR-80 (80kg, 1500mm), the MSR-50 fills the gap for medium-duty tasks that need longer travel than the MSR-30 but cannot accommodate the MSR-80's larger footprint (120mm rail width vs. 80mm). The MSR-50's 80mm rail width and 1000mm stroke allow it to fit into 19-inch equipment racks or under 1200mm-wide workbenches. Its ball screw design offers 30% higher thrust (200N vs. 150N) than the belt-driven MSR-30, making it better suited for pushing loads up a 15° incline. Additionally, the MSR-50 uses the same mounting hole pattern as the MSR-30, enabling drop-in upgrades without re-machining brackets.

Ball screw preload eliminates backlash, maintaining ±0.1mm repeatability over 10,000 hours of operation (L10 life at 50kg).
Hard-anodized aluminum rail (HV 400) resists wear and corrosion, with a static load safety factor of 2.5.
Integrated 1000ppr encoder and limit switches simplify wiring and enable closed-loop control with standard drives.

Core Technical Features and Quantified Advantages

STEP 1

50kg Load Capacity with 2.5 Safety Factor

The MSR-50's carriage is supported by four preloaded linear ball bearings (15mm bore) running on a hardened steel guide rail (HRC 60). Under a centered 50kg load, the maximum deflection is 0.05mm at mid-stroke, and the static safety factor is 2.5 (yield strength of aluminum alloy 6063-T5 is 170MPa). This allows for occasional overloads up to 125kg without permanent deformation. For off-center loads, the allowable moment is 15Nm in pitch and yaw, and 10Nm in roll, covering most industrial fixtures.

STEP 2

±0.1mm Repeatability via Preloaded Ball Screw

A 16mm diameter ball screw with 5mm lead and a double-nut preload system eliminates axial clearance, achieving bidirectional repeatability of ±0.1mm. The screw is made from SCM415 alloy steel, induction-hardened to HRC 58, and ground to C5 accuracy (ISO 3408). With a 1000ppr encoder on the motor, the closed-loop system can compensate for thermal expansion up to 0.02mm per meter per °C, maintaining accuracy in environments from 0°C to 40°C.

STEP 3

1000mm Stroke with Integrated Limit Switches

The 1000mm stroke is measured between mechanical end stops, with ±0.5mm end-stop accuracy. Two normally-closed limit switches (rated 24V DC, 0.5A) are pre-wired to a 1m cable, providing overtravel protection. The rail's extrusion includes T-slots for mounting sensors or cable carriers. At maximum speed (100mm/s), the full stroke is covered in 10 seconds, and the motor's acceleration profile (0.5m/s²) prevents load shifting. The compact 80mm rail width allows installation in spaces as narrow as 100mm.

STEP 4

24V DC Brushless Motor with Electromagnetic Brake

The integrated 24V DC brushless motor delivers 0.4Nm continuous torque and 1.2Nm peak, with a built-in 1.2Nm holding brake that engages when power is removed. This is critical for vertical installations, preventing the carriage from dropping under a 50kg load. The motor is rated IP54 and includes a 1000ppr incremental encoder. It is compatible with standard stepper/servo drives (e.g., Leadshine, Delta) via a 4-wire interface. Thermal protection (PTC) prevents overheating during continuous duty.