How to choose a suitable marine gearbox for your ships?

1. Which is better Brand in China for the marine gearboxes:

If you want to buy the marine gearboxes from China, firstly please keep in mind there are at least the following 3 brands:

Advance brand: China top brand Advance marine gearbox, most gearbox are exchangeable with ZF brand, it divided into light weight high speed gearbox, common gearbox and some bigger gearboxes with nearly more than 100 models.

Fada brand: If say Advance is top brand, then FADA is second, the quality and price is common, even some models only there is few price difference compare with Advance, the supplying scope and the models is less than Advance. FADA was originality set up by Advance retired engineers, so the tech. Adopt Advance old types. But the parts changed and price is a little higher, and even the parts delivery time is much longer.

Fenjin brand: China 3^rd brand, the quality and price are so lower than Advance, some customers choose it just because of its lower price, but we know the price equals to its quality. But in the market there is still some saying, I bough Fenjin, but it is good, yes maybe in the short time all will be good, let us to better understand a brand in long term.

Compare with the gearbox Twin Disc and ZF, Advance brand there is 70-80% market in domestic market and also exported more than 100 countries, the economical and price and delivery time aspect, most customers also give up Korean brand.

2. Which gearbox is correct for ships?

Normally to choose the correct marine gearboxes for ships. Should be according to the marine engine power, speed and the gearbox ratio.

And what is the gearbox ratio?

That is the engine power through gearbox, then how is the propeller speed. It usually described as ratio 1:1, 1.5:1, 2:1, 3:1, 5:1, ....20:1...

• For marine gearbox replacing project, please kindly indicate the marine engine rated power, KW, hp, ps, Bhp, and the engine rated speed, and your original gearbox ratio, and also the engine flywheel size is? The flywheel size usually can be SAE1#14’, SAE0#18’, SAE3#11.5’ That in order to make sure the new gearbox can be well connect with your original engine. And maybe some type of gearbox need high plastic rubber plate between them, which function is for easy repair and reducing the shock.
• For new ship building project, please at least there are the following 3 cases:

A, if Sinooutput had supplied you the marine engines, then you also want the gearbox from us, then just tell us the gearbox ratio is OK;

B, If the stern shaft also from Sinooutput, that will be more easy to operate, and it will save you more jobs, the more important thing, it will save you more cost;

C, you do know what is the gearbox ratio will be better for your ship. Are you headache? NO worries with Sinooutput, please just share your ship drawings to Sinooutput, Sinooutput engineers will do the free calculation for you.

3. What is the marine gearbox function for the ships?

Marine gearbox could increase or reduce the ship speed. So some customer call it gear box, transmission or speed reducer.

• If choose the marine gearbox too bigger, that will be also a bigger waste for your money, and it heavier for your ships. If choose the marine gearbox too smaller, that will be less for the trans. Capacity, then the gearbox will be easy to break.
• When install the gearbox, to keep the same line for the engine crankshaft and the geabox input shaft that is very important for the complete propulsion system, otherwise, it will also cause some break for the gearbox, engine and stern shaft.
• The marine gearbox ratio must be suitable for the ship speed calculation, otherwise, it will influence your boat speed and can not do better performance for the propeller.
• Even few customers feedback, i use the gearbox less trans. Capacity but now it works well. Yes maybe in a short time, it looks very good, but let us to check it for a long term, or some problems had been occurred inside.

4. Electrical for the marine gearbox is optional?

Yes of course, Sinooutput could install the electrical control valves for your marine gearboxes as your requirements, if your engine is also electrical type and the control level also electrical type, then choose the gearbox electrical will be better manage for you.

5. What is the correct gearbox oil number?

Ordinary pinion boxes generally use CD40 diesel oil, high-speed boxes include some large gearboxes, then we recommend that they grade a little higher, you can use CF level. CF-4 or CH-4 grade that oil is OK, but this oil, can not contain extrusion additives, extrusion additives will damage the friction sheet. And also please consider your application area temperature.

Another question maybe you thought the gearbox oil feeding hole is too lower, if feeding much oil or after shaking, it will leak, for this question, Sinooutput can help you to higher the oil feeding hole to in case such problem.

6. What is the quick wear parts for the marine gearbox?

Usually Sinooutput suggest the buyer to purchase China top brand Advance marine gearbox, Sinooutput supply you 3 years quality warranty, with CCS, CE, ISO, ROHS, Intertek, ERP certificate, it is mechanical marine equipments, if take care the daily maintain especially the enough lubricant oil, the gearbox even one year could keep better, but only some quick wear parts need to change such as: friction disc, rubber block etc.

7. What is Sinooutput marine gearbox delivery time?

Sinooutput supply the marine gearboxes delivery time as:

--For the best selling type such as 120C, 135, HC138, 300, D300, we nearly have the stock, so please make sure the gearbox ratio before dispatch.

--For the smaller yacht type gearbox MS series the delivery time usually one month.

--For the bigger marine gearboxes, the delivery time usually about 2-5 months.