Choosing the right electric trolley is critical for optimizing overhead lifting operations. This article explores the diverse range of Harrington Hoists electric trolleys, including the heavy-duty MR series for industrial three-phase applications, the precision-controlled MRQ with Variable Frequency Drive (VFD), and the single-phase SMR and SMRQ models for facilities with limited power options. Additionally, we detail the specialized MR-FG series designed for food processing and sanitary environments. Whether you need rough-service durability or clean-room compliance, Protek Crane Solutions offers the full lineup of these industry-leading motorized trolleys.
Mastering Material Handling: A Guide to Harrington Electric Hoist Trolleys
Electric hoist trolleys are the backbone of efficient material handling, transforming a stationary hoist into a versatile moving system that covers your entire facility. Harrington Hoists offers a comprehensive selection of motorized trolleys engineered for durability, smooth travel, and specific environmental needs.
Below, we break down the key differences between their top models to help you select the perfect fit for your crane system.
1. MR Motorized Trolleys: The Industrial Standard
The MR Series is Harrington’s flagship trolley, built for demanding industrial applications. Designed to pair seamlessly with the (N)ER electric chain hoists, these trolleys are known for their rugged reliability and smooth traversing motion.
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Capacity Range: 1/8 Ton to 20 Ton
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Power Supply: Three-phase (208-230/460V)
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Key Features:
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Innovative side guide roller system for smooth travel and reduced beam wear.
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Sealed body with an IP55 rating, making it suitable for both indoor and outdoor harsh environments.
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Standard pull-rotor motor brake for precise load control.
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2. MRQ Motorized Trolley: Precision with VFD
When your operation requires precise positioning and speed control, the MRQ Series is the ideal solution. This dual-speed trolley features a standard Variable Frequency Drive (VFD), allowing for soft starts and stops that prevent load swing.
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Capacity Range: 1/8 Ton to 1 Ton
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Integration: Specifically designed to add mobility to the EQ Series dual-speed electric hoists.
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Key Features:
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"Under-the-cover" VFD controls for adjustable speed.
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Plug-in pendant connections for fast setup and maintenance ("Quick Disconnect").
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IP55 rated for protection against dust and water.
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3. SMR Motorized Trolley: Single-Phase Power
Not every facility has access to three-phase power. The SMR Series is engineered specifically for these situations, adding powered traversing motion to the SNER Series single-phase electric hoists.
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Capacity Range: 1/4 Ton to 3 Ton
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Power Supply: Single-phase (115/230V)
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Key Features:
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Heavy-duty performance that matches industrial standards despite using single-phase power.
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Includes rubber bumpers and drop stops for enhanced safety.
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Perfect for workshops, garages, and light industrial sites without heavy power infrastructure.
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4. SMRQ Motorized Trolley: Single-Phase Dual Speed
Combining the convenience of single-phase power with the precision of VFD control, the SMRQ Series is a unique solution in the market. It pairs with the SEQ dual-speed hoist to offer high-performance lifting where only standard power outlets are available.
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Capacity Range: 1/8 Ton to 1 Ton
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Key Features:
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Dual-speed VFD control for smooth acceleration and deceleration.
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Reconnectable voltage capabilities (115V or 220-230V).
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Ideal for applications requiring long travel distances in single-phase environments.
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5. MR-FG Motorized Trolley: Food Grade Solutions
For the food and beverage industry, standard equipment often fails to meet sanitary requirements. The MR-FG Series is purpose-built for food processing, pharmaceutical, and clean-room applications.
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Capacity Range: 1/4 Ton to 2 Ton
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Sanitary Design:
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Coated with white epoxy paint for easy cleaning and corrosion resistance.
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Uses food-grade lubricants to prevent contamination.
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Optional stainless steel wheels and side guide rollers available.
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Compliance: Designed to work with the NER-FG Food Grade Hoist, ensuring a completely sanitary lifting system.
Ready to Upgrade Your Crane System?
Protek Crane Solutions is your trusted partner for high-quality lifting equipment. We offer the full line of Harrington electric trolleys to meet any industrial or sanitary requirement.
Get a Quote Today You can easily order online or speak with our lifting experts for a custom quote.
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