When driving at a speed above mid-speed, a vehicle with a strong steering wheel may experience periodic abnormal sounds in the chassis. This may be due to the fact that the balance of the directional gear is destroyed and the drive shaft and its spline shaft and splined sleeve may be excessively worn.
The feeling of heavy and laborious turning may be that the rolling bearings in various parts of the steering system are over-tightened, the bearings are not well lubricated, and the heads of the steering rods are too tight or lack of oil. In addition, insufficient front tire pressure can also cause this to happen.
The steering wheel is difficult to handle. During driving or braking, the direction of the vehicle is automatically biased toward the side of the road. This may be caused by the inconsistent specifications of the front wheels or the air pressure on both sides; the front wheel inclination angles on both sides are not equal, and the front wheel bearing clearance Inconsistent or too different wheelbase may also cause this situation.
There is a sense of drift in the vehicle, which is often caused by the swinging front wheels during driving. When the vehicle reaches a certain high speed, the steering wheel may tremble or swing. Even if the sense of direction of the vehicle is not consistent with the expected control, the speed of the car should be reduced accordingly. However, it may also be caused by shimming tires or tire repairs that cause damage to the front wheel assembly dynamic balance, shock absorber failure, loosening of steering system components, and improper front wheel alignment.
our dished heads are used in a variety of applications and industries such as storage tanks, pressure vessels, road tank, food processing operations, chemical plants ,Nuclear operation, Oil Refining, Architectural feature, power generation.
Due to our forming experience and equipment, we can spin or press the first part of the process of forming your products, It depend on the thickness and material performance,
Our main products are 2:1 SE dished heads, Torispherical heads, Cones,Hemispherical Heads etc
Choosing the right type is the key decision for each customer and one for which our experience team to happy to give advice, simple speaking, the torispherical heads, the less ressure it can withstand, Conversely, the deeper dished heads, for example Elliptical heads, hemispherical, the greater pressure it can take.
Our in house-capability to form dished heads by cold press brings major benefits to our customers and sets us apart from others dished heads manufactures
For carbon steel dished heads, we can forming this dished heads from 76-9000mm in diameter and below 250mm in thickness
The general forming process as the below sketches 
Technical Delivery Condition
1,Our material (hot Rolled Unalloyed structural steel, high and low temperature steel, High Alloy steel)
We have no carbon steel plates in our stock and most of plates are from Chinese steel market or mill. Meanwhile As Japanese owed company, We can also source the plates from Japanese ex-mill if end user can`t accept ex-chinese mill.
Basically the delivery time shall be below 20days for dished heads if plates are from steel market. and Max plates width from them is below 2200mm. it means that the seamless dished heads diameter shall be below about 1800mm.
The max width CS plates that Chinese mill can do is below 4700mm,and dished heads can be seamless below 3800mm in diameter.
2,Enquiry/order required information
We can give our clients once they gave us the below information
But if clients tolerance is higher than below Hokkai standards, it shall be provided to Hokkai prior to offer or ordering.
Hot Press Dished Head,Hot Press Hemispherical Dished Head,Hot Press Elliptical Head,Hot Mould Press SS Dish Heads
YIXING HOKKAI HEAD PLATE CO.,LTD , http://www.hokkaidishedend.com