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China Best Sales Gearbox Test Bench Hydraulic Motor Test Bench Worm Gearbox supplier

Product Description

Product Description

ZJ-A type large torque speed sensor is capable of measuring various Super torque. The detection is mainly used in large motor, engine, internal combustion engines and other rotating power equipment output torque and power; detection of fan and water pump, gear box, torque wrench, torque and power; detection of railway locomotive, automobile, tractor, aircraft, shipbuilding, mining machinery in torque and power.


Model Range 
Maximum speed
ZJ-500K A 500K 800 ±0.2% F.S
ZJ-750K A 750K 710 ±0.2% F.S
ZJ-1000K A 1000K 710 ±0.2% F.S
ZJ-1200K A 1200K 560 ±0.2% F.S
ZJ-1500K A 1500K 560 ±0.2% F.S
ZJ-2000K A 2000K 480 ±0.2% F.S


ZJ torque speed sensor (dynamic) adopts strain gauge measurement technique.The electrical signal of elastic shaft under torsion can be measured by providing power for the strain gauge bridge. After amplified,and voltage/frequency conversion, the strain signal is converted into the frequency signal directly proportional to torsional strain.

Product features:

1. Torque measurement;energy and signal non-contact transmission; output signal digitized .
2. High testing precision, high stability and anti-inter ference ability. 
3.Repeating zero setting is not required continuous 
4. Both static torque and dynamic torque can be measured. 
5.an be used independently without secondary instrument, output signal can directly use by PLC or PC . 
6.Can be customized according to customer requirements.

Main Function and Performance Index:

Torque indication error: <± 0.2 % F · S   
Sensitivity: 1±0.2 mv / V              
Nonlinear: ≤±0.2 % F·S    
Repeatability: ≤±0.2% F·S      
Lag: ≤0.2 % F·S       
Zero drift (24 hours) : ≤0.1 % F·S   
Output impedance: 1KΩ ±3Ω           
Insulation resistance: >500MΩ
Static overload: 150 %    
Breaking load: 200 %  
Power supply voltage:DC±15V±5% ,DC 24V( optional)
Speed output signal: 60-2000 pulse / turn(optional)
Zero torque frequency output:10KHZ       
Positive torque full scale frequency output :15KHZ    
Reverse torque full scale frequency output :5KHZ      
Signal duty ratio: (50±10)%  
Power consumption of the sensor: 4W
Temperature when use: -20 ~ 70ºC 
Relative humidity: ≤90%RH 

Related Products

Main application: 

DWZ disc eddy current brake is mainly used as load in loading dynamometer equipment. it is experimental apparatus which can measure the dynamic mechanical properties, especially in dynamic loading test whose power value is small or tiny, also can be treated as suction power devices of other dynamic devices. 

DW series disc eddy current dynamometer is, is that add device for measuring torque and rotational speed on DWZ series disc eddy current brake, it is experimental apparatus which can measure the dynamic mechnical properties, especial in dynamic loading test whose power value is small or tiny.

CW eddy current brake as a load is mainly used to measure the mechanical characteristics of inspection equipment, it and other control instrument (including loading apparatus, torque speed sensor and torque power acquisition instrument etc.) can be composed of eddy current dynamometer can be used for performance testing of the internal combustion engine, motor, gas turbine, automobile and its dynamic mechanical components, compared with other power measuring device, the CW series power measuring device has the advantages of reliability, high stability and practicability.

Company Information:

Product Line:



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Rated Torque: 2000 N.M
Voltage: 90V DC
Current: 5 a
Allowable Rotational Speed: 250 R/Min
Slip Power Self Cooling: 1.2 Kw
Slip Power Water Cooling: 10 Kw


Customized Request

worm gearbox

Calculating Gear Ratio in a Worm Reducer

The gear ratio in a worm reducer is determined by the number of teeth on the worm wheel (also known as the worm gear) and the number of threads on the worm shaft. The gear ratio formula for a worm reducer is:

Gear Ratio = Number of Teeth on Worm Wheel / Number of Threads on Worm Shaft

For example, if the worm wheel has 60 teeth and the worm shaft has a single thread, the gear ratio would be 60:1.

It’s important to note that worm reducers have an inherent self-locking property due to the angle of the worm threads. As a result, the gear ratio also affects the mechanical advantage and the system’s ability to resist backdriving.

When calculating the gear ratio, ensure that the worm reducer is properly designed and that the gear ratio aligns with the desired mechanical characteristics for your application. Additionally, consider factors such as efficiency, load capacity, and speed limitations when selecting a gear ratio for a worm reducer.

worm gearbox

Does a Worm Reducer Require Frequent Maintenance?

Worm reducers generally require less frequent maintenance compared to some other types of gearboxes due to their design and operating characteristics. However, maintenance is still essential to ensure optimal performance and longevity. Here are some key points to consider:

  • Lubrication: Proper lubrication is crucial for worm gearboxes. Regularly check the lubricant level and quality to prevent wear and overheating. Lubricant should be changed as recommended by the manufacturer.
  • Inspections: Periodically inspect the gearbox for signs of wear, damage, or oil leaks. Check for any unusual noises, vibrations, or changes in performance that could indicate a problem.
  • Tightening and Alignment: Check and tighten any loose fasteners and ensure that the gearbox is properly aligned. Misalignment can lead to increased wear and reduced efficiency.
  • Seal Maintenance: Inspect and maintain seals to prevent oil leakage and contaminants from entering the gearbox.
  • Cleaning: Keep the gearbox clean from debris and contaminants that could affect its performance. Regular cleaning can prevent premature wear and damage.
  • Load and Speed: Ensure that the gearbox is operating within its rated load and speed limits. Exceeding these limits can lead to accelerated wear and potential failure.
  • Environmental Conditions: Consider the operating environment of the gearbox. Extreme temperatures, humidity, and other factors can impact the gearbox’s performance and longevity.

While worm gearboxes are known for their durability and self-locking feature, neglecting maintenance can lead to premature wear, reduced efficiency, and potential breakdowns. Following the manufacturer’s recommendations for maintenance intervals and procedures is essential to keep the worm reducer in optimal condition.

worm gearbox

Can a Worm Gearbox Provide High Torque Output?

Yes, a worm gearbox is capable of providing high torque output due to its unique design and principle of operation. Worm gears are known for their high torque multiplication capabilities, making them suitable for applications that require significant torque transfer.

The torque output of a worm gearbox is influenced by several factors:

  • Lead Angle: The lead angle of the worm affects the mechanical advantage of the gear system. A larger lead angle can result in higher torque output.
  • Worm Diameter: A larger diameter worm can offer increased torque output as it provides more contact area with the gear.
  • Gear Ratio: The gear ratio between the worm and the gear determines the torque multiplication factor. A higher gear ratio leads to higher torque output.
  • Lubrication: Proper lubrication is essential to minimize friction and ensure efficient torque transmission.
  • Material and Quality: High-quality materials and precision manufacturing contribute to the gearbox’s ability to handle high torque loads.

Due to their ability to provide high torque output in a compact form factor, worm gearboxes are commonly used in various industrial applications, including heavy machinery, construction equipment, conveyor systems, and more.

China Best Sales Gearbox Test Bench Hydraulic Motor Test Bench Worm Gearbox   supplier China Best Sales Gearbox Test Bench Hydraulic Motor Test Bench Worm Gearbox   supplier
editor by CX 2024-02-26