This is Qingdao Yonghexing Boat Propeller Factory of China. Our company is a professional metal parts co., ltd. We are aleading company operate manufacturing and international trade office. We have ourown factory in china. Our main products includecasting, forging, stamping, fabrication, machined parts rubber products, valves, etc. Theyare widely used in auto parts, shipping--build parts, engineeringmachinery, mining machinery, agriculture machinery, aerospace industry andelectronic industry. And ours suppliers have atttained world quality systemcertification such as ISO9001: 2000, QS9000, QS16949, ISO14000 ect. We couldprovide high-quality product, reasonable price, timely delivery and bestservice. We will do whatever we can in order to satisfy our customers!
If you have a interesting to our company pls see ourcompanys websiteThere is a great amount of products of our company.
We will be your good parter in your business. We hopefullymake a good cooperation with your honorable company in future. Pls contact withus if you want to know our more
Brief Introduction:

1, We are an ISO9001 approved manufacturer, which specialize in production of 
precision parts, we have rich experience in CNC parts, especially sensor, connector, 
auto parts, machine parts, computer parts and so on.  
   
2, Our mostly machines are imported from Janpan's Mazak and Okuma, 
products are famous for high speed and high precision in intra-industry, 
so please believe us we will offer you the best quality, prompt lead time 
and competitive price parts.

Packing & Delivery 

1, Packing:
We can provide normal free plastic film, and carton box; 
While customized  label and carton with your LOGO are also available.
 
2, Delivery:
After confirming order, samples about 2-3 weeks, mass production about 4-6 weeks according to your requirements and production quantity of products.
 
Why Choose us?
 
1. Price : Reasonable and competitive price according to your drawings 
and requirements;
 
2. Sales Team: Professional engineers and sales service for you at 24 hours, 
and give you the best advice to help you save cost; website also supporting 
in multiple languages;
 
3. Quality Control: All processing and inspection completely follow 
ISO 2008 rules and system.  Technician will test by themselves during 
each processing; then QC member will inspect again before next 
processing; 100% final inspection for critical dimension before shipping;
 
4. Rich Experience: Lots of experienced workers with more than 10 years 
in this field; Owning advanced processing equipment and detection equipment; 
Experiences making a huge variety of items because of the genuinely diverse 
range of customers we serve;
 
5. Quality Assurance: Products are sent to you with 100% inspection, 
which makes you enjoy the 100% quality guarantee, we will help you repair 
or redo within 10~15 days when there any unqualified part;Our factory has 
passed ISO/SGS 9001 quality certification.ISO, SGS Rohs certified reports 
of raw material and finished products can offer to you
 
Yamaha Propeller
Propeller Basics:
This information is critical to determining the correct propeller for your application:
1.3 Blades
A 3-blade propeller usually offer s top speed performance.
2. Diameter:
Diameter is the distance across a circle encompassing all of the propeller blades.
3. Pitch:
Pitch is the theoretical distance a propeller will move through the water of each revolution.
4. Right hand or left hand Rotation
In most cases, right hand propellers are used for single engine application and one left hand propellers are used for twin engine applications to achieve better steering control.
5. Cupped Blades:
This is a technique used to enhance the performance of propellers under certain conditions. A cupped propeller will exhibit very high efficiency at high speeds as well as minimize cavitation under heavy loads.
6. Rake:
Rake is special design feature. Positive rake benefits from normal bow lift to permit the use of a larger diameter propeller, while negative rake can provide extra blade strength for use in very high speed applications.
 
 
Welcome contact us know more ,thank you 

Lucy