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China factory Advance Marine Gearbox Hc138 car gearbox

Product Description


HC138 MARINE GEARBOX           MAX.275KW at 2500RPM
Engine Speed:1000~2500RPM
Ratio 2.0 2.52 3.0 3.57 4.05 4.45
Rate(KW/rpm) 0.11
Bell housing:SAE1,2
Net Weight:360Kg
Flange:SAE 14,11 1/2 
Options/Comments:PTO device available;Mechanical remote operation
Centre distance:225mm


MODEL MAX Capacity speed ratio weight
06 12HP 1000~2000RPM 2.52/ 3.05/ 3.5 58KG
16A 32HP 1000~2000RPM 2.07/ 2.48/ 2.95/ 3.35/ 3.83 84KG
26 67HP 1000~2500RPM 2.5/ 3/ 3.5/ 4 92KG
MA100  37HP 1500~3000RPM 1.6/ 2/ 2.55/ 3.11/ 3.59/ 3.83 75KG
MA125A 82HP 1500~3000RPM 2.03/ 2.46/ 3.04/ 3.57/ 4.05 115KG
MA142A 102HP 1500~3000RPM 1.97/ 2.52/ 3.03/ 3.54/ 3.95/ 4.5 140Kg
40A 82HP 750~2000RPM 2.07/ 2.96/ 3.44 225KG
MB170 132HP 1000~2500RPM 1.97/ 2.52/ 3.04/ 3.54/ 3.96/ 4.5/ 5.06/ 5.47/ 5.88 240KG
HC571 80HP 1500~3200RPM 1.50/ 1.96/ 2.48/ 3.00/ 3.48 70KG
HC038A 121HP 1500~3200RPM 1.51/ 2.03/ 2.52/ 2.92/ 3.45 70KG
HC65 183HP 1000~2500RPM 1.53/ 2.03/ 2.50/ 2.96/ 3.50 130KG
120B 215HP 750~1800RPM 2.03/ 2.81/ 3.73 400KG
120C 340HP 1000~2500RPM 1.48/ 1.94/ 2.45/ 2.96/ 3.35 225KG
MV100A 408HP 1500~3000RPM 1.23/ 1.28/ 1.62/ 2.07/ 2.52/ 2.87 220KG
135A 272HP 1000~2000RPM 2.03/ 2.59/ 3.04/ 3.62/ 4.11/ 4.65/ 5.06/ 5.47/ 5.81 470KG
MB242 350HP 1000~2500RPM 3.04/ 3.52/ 3.95/ 4.53/ 5.12/ 5.56/ 5.88 385KG
HCQ138 390HP 1000~2600RPM 1.03/ 1.28/ 1.5/ 2.03/ 2.48/ 2.95 200KG
HC138 374HP 1000~2500RPM 2.0/ 2.52/ 3.0/ 3.57/ 4.05/ 4.45 360KG
HCD138 374HP 1000~2500RPM 5.05 / 5.63/ 6.06/ 6.47 415KG
HCA138 390HP 1000~2600RPM 1.095/ 1.28/ 1.50/ 2.03/ 2.48/ 3.0 385KG
HC200 440HP 1000~2200RPM 1.48/ 2.00/ 2.28 280KG
HCC200 500HP 1000~2500RPM1.034/ 1.451/ 1.997/ 2.422/ 2.935   400KG
HC201 500HP 1000~2500RPM 2.46/ 2.955/ 3.526 350KG
MB270A 500HP 1000~2500RPM 4.05/ 4.53/ 5.12/ 5.5/ 5.59/ 6.39/ 6.82 675KG
HCQ300 782HP 1000~2300RPM 1.06/ 1.46/ 2.05/ 2.38 350KG
Z300 910HP 750~2300RPM 1.87/ 2.04/ 2.54/ 3/ 3.53/ 4.10/ 4.47/ 4.61/ 4.94/ 5.44 740KG
J300 875HP 750~2300RPM 2.04/ 2.54/ 3.0/ 3.47/ 3.95 740KG
D300A 805HP 1000~2300RPM 4/ 4.48/ 5.05/ 5.52/ 5.9/ 6.56/ 7.06/ 7.63 880KG
T300 759HP 1000~2300RPM 4.95/ 6.03/ 6.65/ 7.04/ 7.54/ 8.02/ 8.47 1120KG
T300/1 611HP 1000~2300RPM 8.94/ 9.45 1120KG
HCA300 850HP 1000~2500RPM 1.50/ 2.00/ 2.57/ 2.95 370KG
M300 805HP 1000~2300RPM 1.45/ 2.00/ 2.52/ 3.05/ 3.45/ 3.94 700KG
MD300 805HP 1000~2300RPM 3.96/ 4.48/ 4.96/ 5.52/ 5.9 940KG
HCQ401 1035HP 1500~2300RPM 1.00/ 1.12/ 1.25/ 1.50/ 1.76/ 2.04/ 2.50 480KG
HC400 810HP 1000~1800RPM 1.50/ 1.77/ 2.04/ 2.50/ 2.86/ 3.0/ 3.42/ 4.06/ 4.61/ / 4.94 820KG
HCD400A  810HP 1000~1800RPM 3.96/ 4.33/ 4.43/ 4.70/ 5.00/ 5.53/ 5.89 1100KG
HCT400A  945HP 1000~2100RPM 6.09/ 6.49/ 6.93/ 7.42/ 7.95/ 8.4/ 9/ 9.47 1100KG
HCT400/1 945HP 1000~2100RPM 8.15/ 8.69/ 9.27/ 9.94/ 10.6/ 11.46/ 12 1500KG
HCQ501 1265HP 1000~2300RPM 1.03/ 1.46/ 2/ 2.45 560KG
HCQ502 1265HP 1000~2300RPM 2.95 700KG
HC600A 1365HP 1000~2100RPM 2/ 2.48/ 3/ 3.58/ 3.89 1300KG
HCD600A  1365HP 1000~2100RPM 4.18/ 4.43/ 4.7/ 5/ 5.44/ 5.71 1550KG
HCT600A  1260HP 1000~2100RPM 6.06/ 6.49/ 6.97/ 7.51/ 8.04/ 8.66/ 9.35 1600KG
HCT600A/1 1260HP 1000~2100RPM 7.69/ 8.23/ 8.82/ 9.47/ 10.8/ 11.65/ 12.57 1700KG
HC701 1285HP 1200~2400RPM 1.93/ 2.58/ 2.90/ 3.26/ 3.01/ 4.60/ 5.17/ 6.18/ 7.00/ 7.47 2000KG
HCQ700 1875HP 1000~2500RPM 1.5~2.5/ 2.78/ 2.96 900KG
HCD800 1530HP 1000~1800RPM 3.427/ 3.96/ 4.391/ 4.905/ 5.474/ 5.889 2200KG
HCT800 1530HP 800~1800RPM 4.95/ 5.57/ 5.68/ 5.93/ 6.43/ 6.86/ 7.33/ 7.84/ 8.4 2700KG
HCT800/1 1530HP 800~1800RPM 6.91/ 7.28/ 7.69/ 8.12/ 8.6/ 9.12/ 9.68/ 10.3/ 10.98/ 11.76/ 12.43/ 13.17/ 13.97/ 14.85/ 15.82/ 16.58/ 20.1 32000KG
HCT800/2 1668HP 1000~1800RPM 13.118/ 13.811/ 14.545/ 15.326/ / 16.157/ 17.044/ 17.991/ 20.267/ 22.176 4000KG
HCT800/3 1460HP 1000~1800RPM 16.56/ 17.95/ 20.2 4200KG
HCW800 1886HP 1500~1900RPM 12.584/ 13.244/ 13.945/ 14.68/ 15.46/15.915/ 16.285/ 17.16/ 17.696/ 18.267/ 19.078/ 19.714/ 20.13 3800KG
HC900 1436HP 1000~1800RPM 1.46/ 2.04/ 2.47/ 3/ 3.6/ 4.08/ 4.63/ 4.95 1600KG
HC1000 1898HP 600~1900RPM 2/ 2.5/ 3.04/ 3.48/ 4.06 1800KG
HCD1000 1898HP 600~1900RPM 3.429/ 3.96/ 4.391/ 4.45/ 4.905/ 5.06/ 5.474/ 5.833 1900KG
HCQ1000 2300HP 600~2300RPM 1.176~2.842/ 3.1 1100KG
HCT1100 1841HP 700~1600RPM 5.6/ 5.98/ 6.39/ 6.85/ 7.35/ 7.9 3000
HCW1100 2280HP 1500~1800RPM 15.882/ 16.546/ 17.243/ 17.973/ 18.740/ 19.547/ 20.395 6000KG
HC1200 2276HP 700~1800RPM 2.03/ 2.476/ 2.5/ 2.96/ 3.55/ 3.79/ 4.05/ 4.2/ 4.47 1840
HC1200/1 2276HP 700~1800RPM 3.74/ 3.95/ 4.45/ 5/ 5.25/ 5.58 2500
HCT1200 2571HP 1000~1600RPM 5.05/ 5.60/ 5.98/ 6.39/ 6.85/ 7.35/ 7.9 3000
HC1250 1654HP 400~1800RPM 2.03/ 2.48/ 3.04/ 3.48/ 3.95 2200KG
HCQ1400 2940HP 1000~2100RPM 1.517/ 2.00/ 2.476/ 3.0 1430KG
HCD1400 2520HP 600~1800RPM 4.04/ 4.27/ 4.52/ 4.8/ 5.045/ 5.5 2800KG
HCT1400 2521HP 600~1800RPM 5.031/ 5.524/ 5.966/ 6.485/ 7.031/ 7.497/ 8.571/ 8.465/ 8.593/ 8.984/ 9.118/ 9.552 3700
HCD2000 3571HP 600~1500RPM 3/ 3.577/ 3.958/ 4.455/ 4.95/ 5.263/ 5.429/ 5.75/ 6.053 4000KG
HCT2000 3019HP 500~1500RPM   4700KG
HCD2700 3903HP 500~1400RPM 3.65/ 4.042/ 4.5/ 5.05/ 5.467/ 6.105/  6000KG


HC138 MARINE GEARBOX           MAX.275KW at 2500RPM

Engine Speed:1000~2500RPM


2.0 2.52 3.0 3.57 4.05 4.45




Bell housing:SAE1,2

Net Weight:360Kg
Flange:SAE 14,11 1/2 

Options/Comments:PTO device available;Mechanical remote operation
Centre distance:225mm

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Application: Marine
Layout: Coaxial
Hardness: Soft Tooth Surface
Installation: Horizontal Type
Step: Single-Step
Type: Worm Gear Box

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

Worm Gearbox Applications in Robotics and Automation

Worm gearboxes play a crucial role in various robotics and automation applications due to their unique characteristics and benefits. Here are some common applications where worm gearboxes are used:

  • Robotic Arm Movement: Worm gearboxes are employed in robotic arms to provide precise and controlled movement. The self-locking property of worm gearboxes helps maintain the arm’s position without requiring additional brakes.
  • Conveyor Systems: In automated production lines, worm gearboxes are used to drive conveyor belts and move materials or products along assembly lines with accuracy.
  • Precision Positioning: Worm gearboxes are used in precision positioning systems, such as those found in pick-and-place robots and CNC machines. They ensure accurate and repeatable movements.
  • Pan and Tilt Mechanisms: Worm gearboxes are utilized in pan and tilt mechanisms of surveillance cameras, robotic cameras, and sensors. The self-locking feature helps stabilize and maintain the desired angle.
  • Automated Gates and Doors: Worm gearboxes are used in automated gate and door systems to control their opening and closing movements smoothly and safely.
  • Material Handling: Robots in warehouses and distribution centers use worm gearboxes to manipulate and lift objects, enhancing efficiency in material handling.
  • Medical Robotics: Worm gearboxes are employed in medical robots for surgical procedures, diagnostic equipment, and rehabilitation devices, ensuring precise and controlled movements.
  • Industrial Robots: Industrial robots rely on worm gearboxes for various tasks, including welding, painting, assembly, and packaging, where precise movements are essential.
  • Automated Testing Equipment: In testing and inspection applications, worm gearboxes provide the necessary movement and positioning for accurate testing and measurements.
  • Food and Beverage Industry: Worm gearboxes are used in automated food processing and packaging systems, ensuring hygienic and precise movement of products.

Worm gearboxes are preferred in these applications due to their compact size, high torque output, self-locking feature, and ability to provide a right-angle drive. However, selecting the right gearbox requires considering factors such as load, speed, efficiency, and environmental conditions.

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 factory Advance Marine Gearbox Hc138   car gearbox	China factory Advance Marine Gearbox Hc138   car gearbox
editor by CX 2024-03-28

China factory RV 0.06kw~15kw Worm Gearbox with Electric AC Motor car gearbox

Product Description

RV 0.06KW~15KW Worm Gearbox with Electric AC Motor

Product Description

NMRV 571-150 worm gear box with flange and electric motor
NMRV+NMRV Double Stage Arrangement Reduction Gear Box
RV Series Worm Gearbox
worm speed reducer
nmrv worm gear motor

Detailed Photos

RV Series
Including RV / NMRV / NRV.
Main Characteristic of RV Series Worm Gearbox
RV series worm gear reducer is a new-generation product developed by CHINAMFG on the basis of perfecting WJ series products with a compromise of advanced technology both at home and abroad.
1. High-quality aluminum alloy, light in weight and non-rusting.
2. Large in output torque.
3. Smooth running and low noise,durable in dreadful conditions.
4. High radiation efficiency.
5. Good-looking appearance, durable in service life and small volume.
6. Suitable for omnibearing installation.
Main Materials of RV Series Worm Gearbox
1. Housing: die-cast aluminum alloy(frame size: 571 to 090), cast iron(frame size: 110 to 150).
2. Worm: 20Crm, carbonization quencher heat treatment makes the surface hardness of worm gears up to 56-62 HRX, retain carbonization layer’s thickness between 0.3 and 0.5mm after precise grinding.
3. Worm Wheel: wearable stannum bronze alloy.

IN POWER 0.09-11KW

Product Parameters

When working, great load capacity, stable running, low noise with  high efficiency.
  Gear Box’s Usage Field
1 Metallurgy       11 Agitator  
2 Mine       12 Rotary weeder  
3 Machine       13 Metallurgy   
4 Energy       14 Compressor
5 Transmission     15 Petroleum industry
6 Water Conserbancy     16 Air Compressor
7 Tomacco       17 Crusher  
8 Medical       18 Materials
9 Packing     19 Electronics  
10 Chemical industry     20 Textile indutry
Power 0.06kw 0.09kw 0.12kw 0.18kw 0.25kw 0.37kw 0.55kw
0.75kw 1.1kw 1.5kw 2.2kw 3kw 4kw 5.5kw
7.5kw 11kw 15kw        
Torque 2.6N.m-3000N.m
Ratio 7.5-100, the double gearbox is  more
Color Blue, Silver or as customers’ need
Material Iron or Aluminium
Packing Carton with Plywood  Case or as clients’ requirement
Type RV571 RV030 RV040 RV050 RV063 RV075 RV090
Weight 0.7kg 1.3kg 2.3kg 3.5kg 6.2kg 9kg 13kg
Type RV110 RV130 RV150        
Weight 35kg 60kg 84kg        


Packaging & Shipping

Company Profile

Our Advantages


/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Application: Motor, Machinery
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Layout: Worm
Gear Shape: Worm
Step: Single-Step


Customized Request

worm gearbox

Self-Locking Properties in a Worm Gearbox

Yes, worm gearboxes exhibit self-locking properties, which can be advantageous in certain applications. Self-locking refers to the ability of a mechanism to prevent the transmission of motion from the output shaft back to the input shaft when the system is at rest. Worm gearboxes inherently possess self-locking properties due to the unique design of the worm gear and worm wheel.

The self-locking behavior arises from the angle of the helix on the worm shaft. In a properly designed worm gearbox, the helix angle of the worm is such that it creates a mechanical advantage that resists reverse motion. When the gearbox is not actively driven, the friction between the worm threads and the worm wheel teeth creates a locking effect.

This self-locking feature makes worm gearboxes particularly useful in applications where holding a load in position without external power is necessary. For instance, they are commonly used in situations where there’s a need to prevent a mechanism from backdriving, such as in conveyor systems, hoists, and jacks.

However, it’s important to note that while self-locking properties can be beneficial, they also introduce some challenges. The high friction between the worm gear and worm wheel during self-locking can lead to higher wear and heat generation. Additionally, the self-locking effect can reduce the efficiency of the gearbox when it’s actively transmitting motion.

When considering the use of a worm gearbox for a specific application, it’s crucial to carefully analyze the balance between self-locking capabilities and other performance factors to ensure optimal operation.

worm gearbox

How to Calculate the Efficiency of a Worm Gearbox

Calculating the efficiency of a worm gearbox involves determining the ratio of output power to input power. Efficiency is a measure of how well the gearbox converts input power into useful output power without losses. Here’s how to calculate it:

  • Step 1: Measure Input Power: Measure the input power (Pin) using a power meter or other suitable measuring equipment.
  • Step 2: Measure Output Power: Measure the output power (Pout) that the gearbox is delivering to the load.
  • Step 3: Calculate Efficiency: Calculate the efficiency (η) using the formula: Efficiency (η) = (Output Power / Input Power) * 100%

For example, if the input power is 1000 watts and the output power is 850 watts, the efficiency would be (850 / 1000) * 100% = 85%.

It’s important to note that efficiencies can vary based on factors such as gear design, lubrication, wear, and load conditions. The calculated efficiency provides insight into how effectively the gearbox is converting power, but it’s always a good practice to refer to manufacturer specifications for gearbox efficiency ratings.

worm gearbox

How to Select the Right Worm Gearbox for Your Application

Selecting the right worm gearbox for your application involves careful consideration of various factors:

  • Load Requirements: Determine the torque and load requirements of your application to ensure the selected gearbox can handle the load without compromising performance.
  • Speed Reduction: Calculate the required gear reduction ratio to achieve the desired output speed. Worm gearboxes are known for high reduction ratios.
  • Efficiency: Consider the gearbox’s efficiency, as worm gearboxes typically have lower efficiency due to the sliding action. Evaluate whether the efficiency meets your application’s needs.
  • Space Constraints: Assess the available space for the gearbox. Worm gearboxes have a compact design, making them suitable for applications with limited space.
  • Mounting Options: Determine the mounting orientation and configuration that best suits your application.
  • Operating Environment: Consider factors such as temperature, humidity, and exposure to contaminants. Choose a gearbox with appropriate seals and materials to withstand the environment.
  • Backlash: Evaluate the acceptable level of backlash in your application. Worm gearboxes may exhibit more backlash compared to other gear types.
  • Self-Locking: If self-locking capability is required, confirm that the selected gearbox can prevent reverse motion without the need for external braking mechanisms.
  • Maintenance: Consider the maintenance requirements of the gearbox. Some worm gearboxes require periodic lubrication and maintenance to ensure proper functioning.
  • Cost: Balance the features and performance of the gearbox with the overall cost to ensure it aligns with your budget.

Consult with gearbox manufacturers or experts to get recommendations tailored to your specific application. Testing and simulations can also help validate the suitability of a particular gearbox for your needs.

China factory RV 0.06kw~15kw Worm Gearbox with Electric AC Motor   car gearbox	China factory RV 0.06kw~15kw Worm Gearbox with Electric AC Motor   car gearbox
editor by CX 2024-03-14