Sinooutput mainly only do the speed-reduce gearbox brand is
Advance brand, We are the Shanghai Selling Center, most customers always confirmed for the gearbox models especailly for the model HC300 and 300. Sinooutput would like help you to make it clear:
Marine gearbox model 300 ratio 2:1 to 5.5:1, the trans. Capacity from 0.125kw/rpm to 0.257kw/rpm, rated thruster power is 50Kn, inner center distance is 264mm, dimension is 786*930*864mm, net weight 740kg, bell housing SAE0#18’’, SAE1#14’’. to support the engine max.630hp.
Marine gearbox model HC300 ratio 1.5:1 to 5.5:1, the trans. Capacity from 0.13kw/rpm to 0.257kw/rpm, rated thruster power is 50Kn, inner center distance is 264mm, dimension is 680*930*880mm, net weight 680kg, bell housing SAE0#18’’, SAE1#14’’. to support the engine max.630hp.
There is nearly fewer distance between them from the parameters, but why we say there is some distance? The difference just from the application and operation as follows:
Advance gearbox 300 is better for one boat one engine.
Advance gearbox HC300 is better for one boat twin engines.
For the input and output rotation, HC300 is really working good than 300, and 300 has the risk of break shaft during the anti-clockwise working.
This problem we find out in 2023, and a long time we could not solve it fundamentally, but now when we change the 300 gearbox into HC300, it never comes this problem, so up to now this is a better solution by HC300 for your one boat with twin engines.
