Guideline on Buying Tires How Tire Service Technicians Assess Issues | Page 9

The Tire Repair Job
After dismounting the tire and assessing the damage, the actual tire repair process is relatively
straightforward.
The puncture damage is removed with a special tool known as a carbide cutter. During the tire repair
process, a carbide cutter is usually mounted on a drill set at a low speed, usually 1,200 rpm or lower.
This special cutter is designed to specifically cut the body cables and steel belt within the tire's rubber.
The cutting job helps stabilize the area before the tire service technician fills the resulting space with a
rubber insert that's been cured.
The injured portion of the tread area, as well as those in the sidewall and shoulder of the tire, typically
receive section repairs. This type of repair involves the technician using special tools to take out the
damage and fill in the hollowed out area. The hollowed out area, also known as the void area, is filled
with raw rubber. After being filled with raw rubber, the tire is then cured in a special chamber or press
to ensure the rubber sets and seals the former wound.