car brake caliper advantage
Compared with drum brakes, disc brakes have many advantages:
(1) The working surface of the disc brake is flat and heat transfer
on both sides, the disc is easy to cool when rotating, and it is
not easy to deform;
(2) There is no force-assisting effect, the brake performance is
less affected by the friction coefficient, and the braking
performance is relatively stable;
(3) The thermal expansion of the brake disc along the thickness
direction is small, even if the brake disc expands due to high
temperature after long-term use, the braking effect will be
enhanced;
(4) Small size and quality;
(5) It is easy to realize the automatic adjustment of the gap, and
the maintenance is simple;
(6) The efficiency decreases little after immersion in water, and
it only needs one or two braking to return to normal.
shortcoming
The disadvantage of disc brakes is that the friction plates act
directly on the disc, without automatic friction boosting effect,
and the braking efficiency is low. , a power auxiliary device must
be installed separately; when it is also used for the parking
brake, the installed parking brake transmission is more complicated
than the drum brake, so the application on the rear wheel is
limited
Fixed caliper disc brake
The brake caliper of the fixed-caliper disc brake is fixedly
installed on the axle, which can neither rotate nor move along the
axis of the brake disc, so the brake pad actuating device must be
installed on both sides of the brake disc (for example, Equivalent
to the hydraulic cylinder of the wheel cylinder), in order to press
the brake pads on both sides against the brake disc respectively.
Figure 1 shows a schematic diagram of the structure of the
fixed-caliper disc brake. The brake disc 1 is fixed on the hub, and
the brake caliper 5 is fixed on the axle, which can neither rotate
nor move axially along the brake disc. The brake caliper is
equipped with two brake wheel cylinder pistons 2, which
respectively press the brake blocks 3 on both sides of the brake
disc. When the driver steps on the brake pedal to brake the car,
the brake fluid from the brake master cylinder is pressed into the
brake wheel cylinder, the hydraulic pressure of the brake wheel
cylinder rises, and the pistons of the two wheel cylinders move to
the brake wheel under the action of hydraulic pressure. The moving
disc presses the brake pad against the brake disc, and the brake
pad clamps the brake disc to generate a friction torque that
prevents the rotation of the wheel to achieve braking.
The manufacturing process of the hydraulic cylinder in the
fixed-caliper disc brake is similar to that of the general brake
wheel cylinder, so this structure was adopted when the disc brake
came out in the mid-1950s, and it was still popular until the end
of the 1960s. However, this brake has the following disadvantages:
1) There are many hydraulic cylinders, which makes the structure of
the brake caliper complex;
2) The hydraulic cylinders are placed on both sides of the brake
disc and must be connected by the inner oil passage or the outer
oil pipe of the caliper that spans the brake disc. This inevitably
makes the size of the brake caliper too large to be installed in
the rim of a modern car;
3) When the heat load is large, the brake fluid in the hydraulic
cylinder (especially the outer hydraulic cylinder) and the oil pipe
or oil passage across the brake disc is easily vaporized by heat;
4) If it is to be used as a parking brake, a mechanically actuated
parking brake caliper must be installed.
These shortcomings make it difficult for fixed-caliper disc brakes
to adapt to the requirements of modern automobiles, so since the
1970s, they have gradually given way to floating-caliper disc
brakes.
Jekit Racing Rotor Size Minimum Inch Wheel Size
7600-285*24mm 15inch wheels
7600-300*24mm 16inch wheels or above
7600-300*28mm 17inch wheels or above
5200-330*28mm 17inch wheels or above
9200-330*28mm 17inch wheels or above
9200-345*28mm 18inch wheels or above
GT4-345*28mm 18inch wheels or above
8560-355*28mm 18inch wheels or above
9040-355*32mm 18inch wheels or above
8530-355*32mm 18inch wheels or above
GT6-355*32mm 18inch wheels or above
F50-355*32mm 18inch wheels or above
9040-362*32mm 19inch wheels or above
GT6-362*32mm 19inch wheels or above
8520-370*36mm 19inch wheels or above
8520-380*36mm 20inch wheels or above
8520-390*36mm 20inch wheels or above
GT6-380*34mm 20inch wheels or above
GT6-405*34mm 21inch wheels or above
8520-410*36mm 22inch wheels or above
