China Hot selling Advance GWC series Marine Gearbox with Lohmann Stolterfoht Technology sequential gearbox

Product Description

Advance HCT400A series marine main propulsion propeller reduction gearbox, with Advance gearbox list as:

Model Engine Speed Reduction Ratio Weight Rated Thrust
GWC28.30 400-900 2.0607[0.781kw/rpm] 1230 80
400-1150 2.5053[0.642kw/rpm]
400-1350 3.08[0.522kw/rpm]
400-1600 3.5353[0.455kw/rpm]
400-1800 4.0526[0.397kw/rpm] 4.5351[0.346kw/rpm]
5.0918[0.316kw/rpm] 5.5861[0.286kw/rpm]
GWC30.32 400-900 2. 0571 [1.066kw/rpm] 1460 100
400-1150 2.5517[0.846kw/rpm]
400-1350 3.037[0.713kw/rpm]
400-1600 3.52[0.618kw/rpm]
400-1800 4[0.537kw/rpm] 4.5455[0.47kw/rpm]
5.571[0.426kw/rpm] 5.641[0.375kw/rpm]
GWC32.35 400-900 2.0585[1.346kw/rpm] 2250 113
400-1150 2.5415[1.088kw/rpm]
400-1350 3.5711[0.9176kw/rpm]
400-1600 3.5759[0.772kw/rpm]
400-1800 4.0526[0.684kw/rpm] 4.5930[0.602kw/rpm]
5.571[0.537kw/rpm] 5.5724[0.493kw/rpm]
GWC36.39 400-900 1.9737[1.838kw/rpm] 3000 140
400-1150 2.4502[1.471kw/rpm]
400-1350 2.9791[1.221kw/rpm]
400-1600 3.4737[1.044kw/rpm]
400-1800 3.9474[0.919kw/rpm]  4.3958[0.816kw/rpm]
5.0065[0.735kw/rpm]  5.4656[0.669kw/rpm]
GWC39.41 400-800 1.975[2.397kw/rpm] 3250 175
400-1000 2.469[1.868kw/rpm]
400-1200 3.052[1.551kw/rpm]
400-1400 3.48[1.33kw/rpm]
400-1600 4.051[1.169kw/rpm]
400-1600 4.484[1.037kw/rpm] 4.996[0.919kw/rpm]
5.506[0.831kw/rpm] 5.999[0.757kw/rpm]
GWC42.45 400-800 2[3.147kw/rpm] 3980 220
400-1000 2.5454[2.471kw/rpm]
400-1200 3.5714[2.081kw/rpm]
400-1400 3.5789[1.757kw/rpm]
400-1600 4[1.573kw/rpm] 4.4706[1.397kw/rpm]
5[1.243kw/rpm] 5.6[1.103kw/rpm]
GWC45.49 400-700 1.9737[4.102kw/rpm] 5280 270
400-900 2.4671[3.272kw/rpm]
400-1050 2.8947[2.721kw/rpm]
400-1250 3.466[2.353kw/rpm]
400-1400 3.9474[2.051kw/rpm] 4.3741[1.823kw/rpm]
4.8496[1.647kw/rpm] 5.5571[1.485kw/rpm]
GWC49.54 400-600 1.9359[5.412kw/rpm] 7900 284
400-750 2.4593[4.257kw/rpm]
400-900 2.9172[3.588kw/rpm]
400-1050 3.4457[3.037kw/rpm]
400-1200 3.9524[2.647kw/rpm] 4.5336[2.294kw/rpm]
4.9105[2.11kw/rpm] 5.4823[1.881kw/rpm]
GWC49.59 400-1050 4[2.962kw/rpm] 8500 284
400-1200 4.4761[2.647kw/rpm] 5.009[2.365kw/rpm]
GWC52.59 400-600 1.9341[7.059kw/rpm] 9800 300
400-750 2.4817[5.493kw/rpm]
400-900 2.9643[4.603kw/rpm]
400-1050 3.5251[3.868kw/rpm]
400-1200 3.9524[3.448kw/rpm] 4.4314[3.059kw/rpm]
4.4314[3.059kw/rpm] 4.9725[2.662kw/rpm]
5.4017[2.493kw/rpm] 5.9286[2.265kw/rpm]
GWC52.59A 400-600 1.9341[7.059kw/rpm]   400
400-750 2.4817[5.493kw/rpm]  
400-900 2.9643[4.603kw/rpm]  
400-1050 3.5251[3.868kw/rpm]  
400-1200 3.9524[3.448kw/rpm] 4.4314[3.059kw/rpm]
4.9725[2.662kw/rpm] 5.4017[2.493kw/rpm]
GWC52.62 400-565 2.017[7.326kw/rpm] 10700 300
400-690 2.462[6kw/rpm]
400-845 3.019[4.893kw/rpm]
400-960 3.449[4.284kw/rpm]
400-1135 4.06[3.64kw/rpm]
400-1200 4.524[3.266kw/rpm] 5.042[2.931kw/rpm]
5.455[2.709kw/rpm] 5.945[2.486kw/rpm]
GWC60.66 400-600 2.0123[9.25kw/rpm] 15000 450
400-750 2.499[7.265kw/rpm]
400-900 3. 0571 [6.169kw/rpm]
400-1050 3.5738[5.287kw/rpm]
400-1200 4.571[4.625kw/rpm] 4.4838[4.571kw/rpm]
5.0786[3.662kw/rpm] 5.5061[3.331kw/rpm]
GWC60.66A 400-600 2.0123[9.25kw/rpm]   550
400-750 2.499[7.265kw/rpm]
400-900 3. 0571 [6.169kw/rpm]
400-1050 3.5738[5.287kw/rpm]
400-1200 4.571[4.625kw/rpm] 4.4838[4.571kw/rpm]
5.0786[3.662kw/rpm] 5.5061[3.331kw/rpm]
GWC60.74 400-530 1.9918[10.449kw/rpm] 18000 550
400-670 2.5263[8.2383kw/rpm]
400-815 3. 0571 [6.809kw/rpm]
400-935 3.51[5.9259kw/rpm]
400-1070 4.5713[5.1756kw/rpm]
400-1200 4.5[4.625kw/rpm] 5.571[4.133kw/rpm]
5.5125[3.7755kw/rpm] 6. 0571 [3.4461kw/rpm]
6.5[3.2019kw/rpm] 6.9429[2.9977kw/rpm]
GWC66.75 300-460 2.052[13.462kw/rpm] 22000 700
300-580 2.553[10.823kw/rpm]
300-680 2.986[9.251kw/rpm]
300-795 3.482[7.934kw/rpm]
300-900 3.952[6.99kw/rpm] 4.486[6.158kw/rpm]
4.969[5.56kw/rpm] 5.509[5.014kw/rpm]
GWC70.76 300-425 2.0481[15.643kw/rpm] 25000 750
300-550 2.528[12.673kw/rpm]
300-700 3.571[10.364kw/rpm]
300-810 3.5826[8.943kw/rpm]
300-900 3.95[8.111kw/rpm]
300-950 4.5737[7.005kw/rpm]
300-970 5.571[6.348kw/rpm]
300-1000 5.5765[5.745kw/rpm] 6.1719[5.191kw/rpm]
GWC70.85 300-400 1.9762[19.2kw/rpm] 30000 800
300-480 2.4505[15.484kw/rpm]
300-600 3.0072[12.617kw/rpm]
300-700 3.4928[10.863kw/rpm]
300-800 3.9524[9.6kw/rpm]
300-850 4.4724[8.484kw/rpm] 5.0503[7.513kw/rpm]
300-900 5.5798[6.8kw/rpm] 6.0521[6.269kw/rpm]
GWC75.90 200-465 2.0113[22.423kw/rpm] 34000 980
200-580 2.5102[17.967kw/rpm]
200-695 3.0067[15kw/rpm]
200-815 3.5143[12.833kw/rpm]
200-925 3.9975[11.282kw/rpm]
200-1571 4.4324[10.175kw/rpm]
200-1100 5.571[8.953kw/rpm] 5.4667[8.25kw/rpm]
GWC78.88 200-310 2.0387[23.372kw/rpm] 35000 1000
200-390 2.495[19.101kw/rpm]
200-470 2.981[15.984kw/rpm]
200-570 3.476[13.709kw/rpm]
200-650 3.95[12.063kw/rpm]
200-680 4.489[10.616kw/rpm]
200-720 5.01[9.512kw/rpm]
200-750 5.469[8.713kw/rpm]
200-800 6.085[7.831kw/rpm]
GWC80.95 200-350 1.975[28kw/rpm] 40000 1200
200-440 2.49[22.2kw/rpm]
200-520 2.94[18.84kw/rpm]
200-610 3.456[16kw/rpm]
200-700 3.95[14kw/rpm]
200-800 4.514[12.25kw/rpm] 5.571[11kw/rpm]
5.479[10.09kw/rpm] 5.925[9.33kw/rpm]
GWC85.100 150-270 1.975[35.4286kw/rpm] 46000 1400
200-340 2.551[27.4286kw/rpm]
200-410 2.9844[23.4454kw/rpm]
200-480 3.4798[20.1081kw/rpm]
200-560 3.95[17.7143kw/rpm]
200-635 4.4838[15.6054kw/rpm]
200-700 4.9657[14. 0571 kw/rpm]
200-780 5.5061[12.7081kw/rpm]
200-845 5.9887[11.6839kw/rpm]
200-910 6.4517[10.845kw/rpm]
200-1000 7.571[9.9198kw/rpm]

manufactured by 1 of the biggest gearbox manufacturer in China, with technologies
introduced from Bosch, Twindisc, Eaton, etc.
Besides gearbox, we mainly sell diesel/petrol engines and related spare parts, with brands
including: Cummins, Deutz, CAT,Isuzu, VM, Toyota, Mitsubishi, Suzuki, Yuchai,
Weichai, Changchai, etc, for various applications, such as automobile, bus, coach, van, truck,
bulldozer, forklift, excavator, road roller, wheel loader, hoister, generator, water pump,
fire pump, marine main propulsion, marine auxiliary, etc.
Besides, we also focus in CHINAMFG engines, including:

SN Models
1 4BT3.9, 6BT5.9, 4ISBE4.5, 6ISBE6.7, QSB4.5, QSB6.7, ISB
2 6CT8.3, 6LT8.9, ISLe8.9, QSL
4 ISF2.8, ISF3.8
5 ISZ13, ISG
6 NT855
7 KT19, KT38, KT50, QSK19, QSK38, etc

for different applications, such as:

SN Applications
1 diesel generator set
2 water pump set, fire pump set
3 construction and engineering machinery (crane, excavator, bulldozer, loader, etc)
4 Automobile (bus, coach, shuttle, etc)
5 marine main propulsion, marine auxiliary generator set

And besides complete engines, we also export a lot of engine parts parts, including:

SN Part Descriptions
1 cylinder head, cylinder block, cylinder liner
2 piston, piston ring, conrod
3 main bearing, conrod bearing, thrust bearing
4 fuel injector, fuel injection pump, common rail
5 oil pan gasket, cylinder head gasket
6 overhaul gasket kit, upper gasket kit, lower gasket kit
7 oil pan
8 fuel transfer pump, water pump, oil pump, vacuum pump, power steering pump
9 oil filter, fuel filter, fuel water separator, air filter, Etc

Beyond Cummins, also engines, gearboxes, and auto body parts for some other brands are available, such as:

SN Brands
1 Deutz, MWM
3 Detroit
4 Isuzu
5 Komatsu
6 Perkins
7 Weichai
8 Yuchai
10 Advance
11 Fada
12 Jinbei, Brilliance
13 Iveco, Yuejin
14 etc

Question: What is the price ?
Answer: Our prices are determined by various factors, including: Brand, Model, Power, Quantity, Price Term (FOB, CIF, CPT, FCA, etc), Certificates, etc.
Question: What is the MOQ ?
Answer: for complete engine, 1 set; for engine parts, 1 engine set;
Question: Are samples available ?
Answer: Sample order is acceptable, but with higher unit price.
       For regular partners, if necessary, free samples are available.
Question: How long is the production cycle (lead time) ?
Answer: for engine parts, we usually have enough stock; for engines, usually around 10-20 days; for stock engine, usually 1 week.
Question: How long is the shipment?
Answer: if by Express, usually 3-4 working days; if by air, usually 3-5 working days; if by sea, 3-7 days to Southeast Asia, 15-20 days to Middle East, South Asia and Australia, 20-25 days to Europe, USA and Africa, 30-35 days to Latin America and other regions.
Question: What are your payment methods ?
Answer: we accept T/T (bank wire transfer), L/C, Western Union, Money Gram, Secured Trade through Made-in-China, etc.

Application: Marine
Function: Speed Reduction
Layout: Three-Ring
Hardness: Hardened Tooth Surface
Installation: Torque Arm Type
Step: Four-Step
US$ 20532.3/Set
1 Set(Min.Order)

Request Sample

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 vs. Helical Gearbox: A Comparison

Worm gearboxes and helical gearboxes are two popular types of gear systems, each with its own set of advantages and disadvantages. Let’s compare them:

Aspect Worm Gearbox Helical Gearbox
Efficiency Lower efficiency due to sliding friction between the worm and worm wheel. Higher efficiency due to rolling contact between helical gear teeth.
Torque Transmission Excellent torque transmission and high reduction ratios achievable in a single stage. Good torque transmission, but may require multiple stages for high reduction ratios.
Noise and Vibration Generally higher noise and vibration levels due to sliding action. Lower noise and vibration levels due to smoother rolling contact.
Backlash Higher inherent backlash due to the design. Lower backlash due to meshing of helical teeth.
Efficiency at Higher Speeds Less suitable for high-speed applications due to efficiency loss. More suitable for high-speed applications due to higher efficiency.
Overload Protection Natural self-locking feature provides some overload protection. May not have the same level of inherent overload protection.
Applications Commonly used for applications requiring high reduction ratios, such as conveyor systems and heavy-duty machinery. Widely used in various applications including automotive transmissions, industrial machinery, and more.

Both worm and helical gearboxes have their place in engineering, and the choice between them depends on the specific requirements of the application. Worm gearboxes are preferred for applications with high reduction ratios, while helical gearboxes are chosen for their higher efficiency and smoother operation.

worm gearbox

Preventing Backlash in a Worm Gearbox

Backlash in a worm gearbox can lead to reduced accuracy, positioning errors, and decreased overall efficiency. Here are steps to prevent or minimize backlash:

  • High-Quality Components: Use high-quality worm gears and worm wheels with tight manufacturing tolerances. Precision components will help reduce backlash.
  • Proper Meshing: Ensure the worm gear and worm wheel are properly aligned and meshed. Improper meshing can lead to increased backlash.
  • Preload: Applying a small amount of preload to the worm gear can help reduce backlash. However, excessive preload can increase friction and wear.
  • Anti-Backlash Mechanisms: Consider using anti-backlash mechanisms, such as spring-loaded systems or adjustable shims, to compensate for any inherent backlash.
  • Lubrication: Proper lubrication can reduce friction and play a role in minimizing backlash. Use a lubricant that provides good film strength and reduces wear.
  • Maintenance: Regularly inspect and maintain the gearbox to identify and address any changes in backlash over time.

It’s important to strike a balance between reducing backlash and maintaining smooth operation. Consulting with gearbox experts and following manufacturer guidelines will help you optimize your worm gearbox’s performance while minimizing backlash.

China Hot selling Advance GWC series Marine Gearbox with Lohmann Stolterfoht Technology   sequential gearbox	China Hot selling Advance GWC series Marine Gearbox with Lohmann Stolterfoht Technology   sequential gearbox
editor by CX 2023-10-10