The difference between fixed-axis gearbox and planetary gearbox
Jun 27,2025
1. Performance characteristics comparison
(1) Transmission efficiency
Fixed-axis type: Gear meshing loss is large (about 85-90% efficiency), especially at high speeds.
Planetary type: Multiple teeth mesh simultaneously, load distribution is uniform, and efficiency is higher (92-95%).
(2) Load-bearing capacity
Fixed-axis type: A single pair of gears bears all loads, suitable for medium and low load conditions.
Planetary type: Multiple planetary gears divide the load, with strong impact resistance, suitable for heavy loads (such as mining buckets).
(3) Shifting smoothness
Fixed-axis type: Power needs to be disconnected when shifting, and there is a short impact (depending on operating skills).
Planetary type: Power shifting can be achieved through a clutch/brake combination (without interruption).
(4) Maintenance complexity
Fixed-axis type: Simple structure, intuitive disassembly and assembly, and easy on-site maintenance.
Planetary type: Special tools are required to disassemble the planetary gear set, and high maintenance precision is required.
2. Applicable scene selection
When the shaft type is selected:
The budget is limited and the maintenance resources are insufficient (such as remote areas).
The working conditions are simple and frequent gear shifting is not required (such as loading and unloading at a fixed site).
When the planetary type is selected:
High-frequency and high-load operations are required (such as 24-hour operation in a mine).
Pursue driving comfort (automatic transmission models mostly use planetary structures)
3. Maintenance precautions
Fixed shaft type:
Focus on checking the gear meshing clearance (measured by the lead pressing method, if it exceeds 0.3mm, it needs to be adjusted).
Wear on the cone surface of the synchronizer will cause gear engagement.
Planetary type:
The clutch plate thickness must be replaced when it is worn to the limit value (usually 2.5mm).
The preload force of the planetary carrier bearing needs to be accurately adjusted with a torque wrench (overtightening may cause overheating).
Summary: The planetary type has advantages in performance and life, but the cost is high; the fixed shaft type wins with economy and maintenance convenience. The actual selection needs to comprehensively consider the equipment tonnage, operation intensity and life cycle cost.
Eligible models
MLT738 is the latest telescopic handler truck launched by our company. With its high-horsepower engine, MLT738 has surging power and strong passability. MLT738 can easily handle various tasks in agriculture. At the same time, we can provide a variety of auxiliary tools, such as large-capacity grain buckets, pitchforks, round bale clamps, etc. , one-stop solution to all customer problems.
WL08 is the best solution for working in narrow spaces and narrow passages. And with this machine and a large number of accessories related to road construction, agriculture, and horticulture, a considerable amount of work can be carried out.The entire vehicle is made of pure iron, which is particularly suitable for forest and outdoor forest operations such as wood grabbing.This machine has a small turning radius and fast driving speed, and can be deployed in buildings as well as on paved and unpaved sites.
WL10 is the best solution for working in narrow spaces and narrow passages. And with this machine and a large number of accessories related to road construction, agriculture, and horticulture, a considerable amount of work can be carried out.The entire vehicle is made of pure iron, which is particularly suitable for forest and outdoor forest operations such as wood grabbing.This machine has a small turning radius and fast driving speed, and can be deployed in buildings as well as on paved and unpaved sites.
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