(1) It is made of national standard gray iron 250 and cast with carbon, silicon and manganese.
(2) Using lost foam processing technology.
(3) CNC center processing to ensure product accuracy.
(4) Dynamic balance test to ensure the concentricity of the brake drum.

Drum brake is mainly composed of brake bottom plate, brake drum, brake shoe, return spring, compression wheel and other components.
During braking, by pedaling and using the lever principle, the force of the push rod is applied to the brake master cylinder. After the pressure of the brake fluid is amplified and the brake slave cylinder is pushed, the pistons at both ends of the brake slave cylinder will simultaneously push the same force to the shoe ends of the left and right brake shoes, and the other ends of the two brake shoes are supported by the support rod. At this time, the two brake shoes expand outward, and it fits with the inner surface of the brake drum to form friction, so as to achieve the purpose of braking. As the wheel is a rotating brake drum, the pressure acting on the brake shoe is asymmetric, resulting in self-increasing force and self-decreasing force. The friction torque of the force increasing brake shoe is 2 ~ 2.5 times that of the force reducing brake shoe, resulting in different wear degrees of the two brake shoes.

Q1. Are you a factory or trading company? 
We are a factory integrating research, development, production and sales.

Q2. What are the advantages of your products?
We support product customization to meet customer needs for special products. We can strictly control the products from raw materials to production, processing, product quality inspection, delivery, packaging, etc., and provide customers with high-end products and the most advantageous prices.

Q3. How about products price?
We are a factory, all products are direct sale at factory price. For the same price, we will provide the best quality; for the same quality, we have the most advantageous price.

Q4. What is your terms of packing?
We have branded packaging and neutral packaging, and we can also do what you want with authorization. This is flexible.

Q5. How to guarantee your after-sales service?
Strict inspection during production, Strictly check the products before shipment to ensure our packaging in good condition. Track and receive feedback from customer regularly. Our products warranty is 365 days.
Each product provides quality assurance service. If there is a problem with the product within the warranty period, the customer can negotiate with us in detail about the related claims, and we will do our best to satisfy the customer.

Q6. How can I accurately buy the products I need?
We need accurate product number, If you can't provide product number, you can send us your product picture, or tell us your truck model, engine name plate, and so on. we will
determine exactly what you need products.

Q7. Do you accept third party inspection?
Yes.we do

Q8. How about your delivery time?
Generally, it will take 3 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

Q9. What are your brand agency conditions and advantages?
After we sign an agent in one city, we will not sign a second company to protect the agent's brand advantage and price advantage. And we will help the agent develop customers and solve all kinds of difficult and miscellaneous problems about products.

Q10. What is your terms of payment?
By TT or LC. We'll show you the photos of the products and packages before you pay the balance.