bpw oem 0310546290 brake drum

Is the less the gap between brake drum and brake pad, the better the braking effect?

Of course, less clearance is as little as possible under the premise that there is no drag brake (the wheel can rotate freely without rubbing with any parts)

What kind of clearance can make the maximum braking torque without changing the original brake system?

Let's discuss......

Every time I feel the brakes suck. I went to adjust the brake. I always felt that the brake strength didn't increase significantly after adjusting

But after a period of time, the braking effect will be awesome after about 200-300 kilometers.

So this is the question

Driver A: The brake clearance of each wheel should be adjusted evenly. The brake should be better. Normally, it's only 2mm. If the clearance is too small, it will affect the heat dissipation.

Driver B: Brake clearance is not the root cause of bad braking unless you have too thin brake pads and too high camshaft support. Brake material is also related to the brake drum out of round, new drum should be boring. There are many reasons..

Driver C: Personal opinion should be between 2-3 mm

Driver D: I'll answer you that oil brake generally reduces the clearance between brake pad and brake drum. The braking force is great. The effect is good. However, there is a mistake for everyone of the air brake. It is also considered that the gap between the brake drum and brake pad is better. This idea is wrong. I will explain:

Under the same air pressure braking, the unit time supply of the brake air pressure, that is, the recent speed, the size of the brake friction has a great relationship with the friction area of the brake friction plate, the stress point of the brake cam, the size of the brake chamber, and the arm length of the brake adjusting arm. The faster the air supply, the more the air supply, the larger the brake friction area, the larger the brake chamber, and the longer the brake adjusting arm, the better the effect .

According to the above two points 1, when adjusting the brake, pay attention to the thickness of the brake friction plate. If it is too thin, the rotation of the brake cam is too large, and it is not at the best output point of the cam. Therefore, it is necessary to replace and increase the roller in time, so that the cam position is at the best output point of the cam when the brake plate is stretched out

2.Adjust the elongation of the push rod of the brake chamber when braking. The elongation of the maximum torque generated by the brake chamber is generally about 15-25 mm. If the adjustment is too tight, the diaphragm of the brake chamber can not be fully extended, and the braking force is insufficient, and the extension is too long

So why do you need to use it for a period of time after adjusting the brake to feel the effect is good? That is, the extension of the brake chamber is too small, and it is not at the best point. After a period of time, the brake pad is worn a little, and the extension of the push rod is in line with the best output point of the brake chamber, so the effect is good.

When adjusting the air brake, generally don't pay attention to the gap between the brake drum and the friction plate. After adjusting the brake, step on the brake, and see how much the position of the push rod is when you don't step on the brake and how much the position of the push rod is after you step on the brake. It's generally better to be in this range. Then turn the brake drum, and there's no drag brake.