The F series three-in-one motor reducer is an efficient and compact power transmission solution specially for lifting cranes. It integrates the motor, reducer and brakes in one unit, providing optimized performance and convenient installation and maintenance.
The F Series Three-in-One Crane Motor Reducer is an all-in-one drive unit that integrates motor, reducer, and braking system into a single compact housing. This design not only saves space, but also reduces the amount of installation and maintenance work. It is specifically built for overhead crane and hoist applications. Designed for IP55/IP65 protection and built with Class F or Class H insulation, it delivers reliable, continuous duty performance in demanding industrial environments, from hot metal workshops to dustyfoundries. The three-in-one design eliminates external coupling, simplifies installation, and reduces the footprint of the entire drive system.
The reducer is one of the core components of the device. Three-in-one crane motor reducer adopts gear transmission method and provides a variety of speed ratio options to meet the needs of different application scenarios. The gear is precision-machined and heat-treated to ensure high efficiency and long service life. Its structure is compact, low noise and smooth operation. Brake is usually electromagnetic brake or hydraulic brake that can quickly brake when power is cut off, ensuring the safety and reliability of the equipment.
Three-in-one Motor Ruducer Core Features
Integrated design: The three are highly integrated, saving installation space, reducing external connectors, and reducing fault points.
High-efficiency transmission: High gear accuracy (such as 6-level accuracy), mechanical efficiency can reach more than 95%, and significant energy saving.
High load-bearing capacity: Use alloy steel gears and reinforced bearings, suitable for frequent start-stop and heavy load conditions.
Safe and reliable: Fast brake response (millisecond level), standard overheating and overload protection functions.
Modular configuration: Three-in-one crane motor reducer can adapt to different power (such as 0.5kW~200kW) and speed ratio (5~1000), and supports flange or shaft installation. Maintenance is easier, and the main components can be replaced separately, reducing downtime.
Automated Material Handling — Conveyor transfers, trolley drives, indexing systems
Technical Parameters
Crane Motor Reducer Item
Parameter range
Rated power
0.5kW ~ 200kW
Output torque
100N·m ~ 50kN·m
Reduction ratio
5 ~ 1000
Duty cycle
S1 (continuous) or S4 (intermittent cycle)
Protection level
IP55/IP65
Insulation level
Class F/Class H
Chinese Professional Crane Motor Reducer Manufacturer
Dafang Crane Exhibition
Dafang Crane Certificate
FAQs About Dafang Three-in-one Crane Motor Reducer
Q1: What does "three-in-one" mean, and what are the advantages?
A: "Three-in-one" integrates the electric motor, gear reducer, and disc brake into a single sealed unit. Benefits:
(1) Compact layout — no external coupling alignment needed, reducing installation space by up to 40%
(2) Fewer components — fewer failure points and less maintenance
(3) Simplified sourcing — one unit to order, install, and service instead of three separate components
(4) Better rigidity — integrated shaft and housing means higher positional accuracy and less vibration.
Q2: How do I choose between IP55 and IP65 protection?
A: IP55 (dust-protected + water splash) is sufficient for most indoor industrial environments — workshops, factories, warehouses. IP65 (dust-tight + water jet protection) is required in: outdoor exposed installations, wash-down environments, foundries with heavy dust and moisture, or coastal/marine applications. If your crane operates near water sprays, high-pressure washdowns, or in open air, specify IP65.
Q3: What is the difference between Class F and Class H insulation?
A: Insulation class defines the maximum allowable winding temperature:
Class F = rated for up to 155°C — suitable for most standard industrial applications with ambient temperatures up to 40–50°C
Class H = rated for up to 180°C — required for hot environments such as steel mills, near furnaces, or hot-rolling mills, or where motor derating is a concern
If your application involves ambient temperatures above 50°C or significant radiant heat from processes, Class H is recommended.
Q4: Can this motor reducer be used with a Variable Frequency Drive (VFD)?
A: Yes. The F Series motor reducer is VFD-compatible. Operating on a VFD allows variable speed control of the hoist or travel motion. When using VFD, ensure:
(1) the motor insulation class matches the VFD switching frequency (Class H recommended for VFD use to withstand voltage spikes)
(2) the brake is properly coordinated with the VFD ramp — the integrated brake must release before the motor accelerates
(3) the VFD is sized for 10–20% above the motor's full-load current.
Q5: What maintenance does the three-in-one unit require?
A: One of the advantages of the three-in-one design is reduced maintenance. Routine checks include:
Every 6 months: Inspect cable connections, check brake pad wear and air gap, lubricate output shaft bearings if applicable
Annually: Oil/grease analysis if applicable, inspect seals for wear or oil leakage, check motor winding resistance
Brake adjustment is only needed if you notice increased stopping distance or brake chatter
Keep the exterior clean and ensure cooling fins/fan are free of dust buildup to prevent overheating.
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