Semi-metallic brake pads are quite effective for most cars, while
their low pricing factor make them quite alluring for most motorists.
Maybe , these are not as perfect as Ceramic pads, but they are not as
expensive as Ceramics.
There is no denying of the fact that the use of disc brakes has
revolutionized the braking system in automobiles, reducing the risk
of road accidents to a great extent. No wonder most contemporary cars
have disc brakes on the front wheels and drum brakes on rear wheels,
while some have disc brakes on both and rear wheels.
The task of disc brake manifests in decelerating the vehicle in a
safe and trouble-free way, bringing it to dead stop, if necessary.
The process entails converting the kinetic energy due to friction
between the brake pads and the rotor disc into thermal energy.
Consequently, it generates heat and plenty of dust (known popularly
as Brake Dust). Needless to say, the brake pads play a vital role
here and so the material used for manufacturing the brake pad has to
be tough enough to withstand the heat and at the same time help
prolong the life of the rotor disc. In order to achieve high levels
of safety, brake pads must also combine a constant friction value
known as friction coefficient along with optimum mechanical strength
and temperature resistance power.
Types of Brake Pads often used in Disc Brakes
Organic Brake Pad
Many cars come with factory assembled disc brakes having Organic
Brake Pads that are made of Kevlar fiber, glasses, resins and rubber.
This results in low rotor disk wear, quiet operation but high amount
of brake dust.
Ceramic Brake Pad
Ceramic brake pads do better than Organic Brake Pads in many respects
that include better high temperature braking, lower pad wear and
reduced brake dust generation.
Semi Metallic Brake Pad
To be honest about it, Semi-metallic and metallic brake pads are
suitable for most cars that are used on a daily basis in cities and
suburbs. Ergo, these are also found suitable for high performance
racing cars. Also, these pads demonstrate good braking power in low
temperature, lower rotor disc wear but louder noise during operation.
As for the type of material that goes for the Manufacture of these
pads, carbon-fiber is often blended into these to change their
optimum heat ranges, as well as friction and wear properties. At the
same time, Semi-Metallic pads are cost effective and also contain
fine metal fibers. However, we might as well take a sneak peek at
some of the pros and cons of Semi-Metallic Brake Pads that are listed
below
Pros
First of all, semi metallic brake pads are cheaper than Ceramic Brake
pads. In fact, there are many brands and qualities that would suit
your selection and pocket. Nevertheless, these have high static
friction coefficient, provide excellent brake performance in both wet
and dry conditions and are asbestos free.
Also, semi-metallic brake pads provide effective grip even in cold
temperature. This is a key issue if you live in colder regions and
need shorter driving trips.
Cons
Semi metallic brake pads may be cheap as compared to Ceramic Brake
Pads, but not as durable as the latter. However, a set will last you
for well over 30, 000 miles. Semi-metallic brake pads also generate
too much brake dust and as a result, you get more dirty wheels to
clean.
Semi-metallic brake pads create more noise than their Ceramic
counterparts, due mostly to their frictional nature. However, people
often ignore the issue in the face of lesser money spent on them.
Postscript
To be precise, while Ceramic brake pads are ideally suited for small
cars, Semi-metallic brake parts are best suited to larger vehicles
such as pickups, minivans and SUVs.
Source: https://brakeneeds.wordpress.com/2016/11/15/better-organic-and-semi-metallic-brake-pads-features-in-vehicles/
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