F Series Three-in-one Crane Electric Motor Gear Reducer

The F Series crane electric motor gear reducer is a compact, three-in-one drive unit that integrates a motor, a helical gearbox, and an electromagnetic brake into a single sealed housing. This series of F-type three-in-one crane electric motor gear reducers has a rated power range of 0.18–200 kW, a reduction ratio range of 5:1–1000:1, and an output torque range of 190–18,000 N·m. It is the preferred drive solution for overhead cranes, steel-plant handling systems, and automated production lines.

Product Introduction

A crane electric motor gear reducer is an integrated drive device that combines an AC motor, a multi-stage helical gear transmission, and an electromagnetic brake into one sealed unit. Achieving mechanical transmission efficiency above 95% per ISO 6336 gear geometry standards. Unlike conventional split-drive systems, the three-in-one architecture eliminates shaft couplings and separate brake assemblies, which reduces the overall footprint by up to 40% and cuts installation time considerably. Moreover, the integrated design improves torsional rigidity and lowers vibration-induced noise below 72 dB(A) under full load. As a result, it is especially suitable for hoisting and travel mechanisms where compact mounting space and fail-safe braking are both required simultaneously.

This F-series crane three-in-one electric motor gear reducer offers three mounting options: foot-mounted, flange-mounted, and shaft-mounted. When selecting a model, users must perform detailed calculations and matching based on the application environment and operational requirements.

Types and Mounting Variants

The F-series motor reducers are available in three main mounting configurations, each of which complies with the frame classifications specified in the IEC 60034-7 standard. Thereby ensuring dimensional interchangeability across products from different crane manufacturers.

• Foot Mounting (B3): A base plate structure secured with bolts. This is the standard preferred option for crane trolley travel drives and hoist frames requiring a flat mounting surface. However, this configuration requires a rigid and level steel structure for the mounting base.
• Flange Mounting (B5/B14): Features an output flange design. Commonly used for drum hoist drives and conveyor drum stations, this configuration is suitable for applications requiring direct axial connection without the need for additional adapter flanges.
• Shaft-Mounted (TH): Features a hollow output shaft design that can be directly splined onto the driven shaft. This solution is ideal for bridge crane end girder drives and is typically used in conjunction with a torque arm to balance reaction loads.

For each installation configuration, precise selection calculations must be performed based on the load spectrum class (FEM 1.001 M3–M8) and thermal operating class (S1 continuous operation or S4 intermittent operation) before finalizing the specific specifications.

Product Features

This F-series motor-gear unit directly reduces operating costs over its entire service life. Under standard operating conditions, the unit typically has a service life exceeding 20,000 hours.

Transmission Efficiency ≥95%: Helical gear profiles ground to DIN 3961 Class 6 precision minimize friction loss on the gear surfaces.

Compact Design: The high-strength cast iron monoblock housing integrates the motor stator, multi-stage gear set, and brake disc, reducing the axial length by up to 35% compared to traditional split-type assemblies.

Electromagnetic Fail-Safe Brake (IP55): This device features a spring-applied, power-off brake design with a response time of ≤0.15 seconds, exceeding the Class 4 safety requirements for suspended load mechanisms specified in FEM 1.001.

Wide Range of Applications: When used with synthetic gear oil meeting ISO VG 220 specifications, the F-series electric gearmotors have a rated ambient temperature range of –25 °C to +40 °C. Additionally, an optional space heater is available to extend cold-start capability to –40 °C.

Easy Maintenance: All serviceable components—including brake linings, oil seals, and oil fillers—can be accessed from a single side, reducing the mean time to repair (MTTR) to less than 45 minutes.

Product Application

The F-series crane electric motor reducers comply with the duty class requirements defined by FEM 1.001 M5–M7 and the GB/T 3811 working group. This series is particularly suitable for applications with strict requirements for continuous lifting and precise positioning.

The equipment’s low-noise operation (≤72 dB(A)) makes it well-suited for lean manufacturing environments subject to strict noise restrictions.

Product Specifications

All ratings listed below comply with IEC 60034-1 (motor performance), ISO 6336 (gear load capacity), and GB/T 3836 (models for hazardous locations, where applicable). Custom gear ratios and rated power outside the standard range are available upon request.

Crane Electric Motor Gear Reducer Supplier and Manufacturers

VOITTO Crane supplies industrial lifting equipment and drive components to customers in more than 30 countries. Therefore, engineering and after-sales support infrastructure spans multiple time zones, ensuring rapid response regardless of project location.

For detailed technical specifications or industry-specific solutions, please feel free to contact our engineering team.

Alan

Crane Solutions Specialist · Voitto Crane

10+Years Exp.

5,000+Customers

50+Countries

Specialized in Overhead Crane, Gantry Crane, Jib Crane, Port Crane & EOT Crane export solutions. 10+ years helping global clients with pre-sales consultation, capacity selection and site-specific configurations.

+86 136 3963 3287 [email protected] Contact Us

FAQ

1. What is the difference between a three-in-one crane electric motor gear reducer and a conventional split-drive system?

A three-in-one unit integrates the motor, gearbox, and electromagnetic brake into a single housing, eliminating couplings and separate brake assemblies. This reduces installation footprint by up to 40%, shortens commissioning time, and improves torsional rigidity compared to split-drive alternatives used in older crane designs.

2. How do I select the correct reduction ratio for my overhead crane application?

Reduction ratio depends on motor rated speed, required drum or wheel peripheral speed, and output torque demand. Refer to FEM 1.001 load spectra and provide VOITTO’s engineering team with rated capacity, lift speed, and travel speed for a free written calculation report.

3. Can the F Series electric motor gear reducer operate in temperatures below –25 °C?

Standard units are rated to –25 °C ambient. However, optional space heaters and low-temperature synthetic lubricants (ISO VG 100) extend continuous cold-start capability to –40 °C, meeting requirements for outdoor crane installations in arctic or subarctic climates.

4. Which duty cycle class does the F Series support under IEC 60034-1?

The F Series supports S1 continuous duty and S4 intermittent periodic duty at 40% cyclic duration factor. S4 is standard for most crane hoisting and travel mechanisms. Higher cyclic factors require thermal derating; VOITTO provides derating curves on request at no charge.

5. Is CE certification included with every unit shipped to the European market?

Yes. All standard F Series reducers carry CE marking under the 2006/42/EC Machinery Directive, and each unit ships with a Declaration of Conformity and factory test report.