Clipper tension is the tension on the screw that holds the blades together. The tension in the scissors determines how wide the blades open. Busy dog groomers know all too well that the more you use your scissors, the more tension they lose. The level of tension each groomer finds comfortable is a matter of personal preference, but there are some guidelines you should follow.
Increase the scissor opening for longer hairs. Be careful not to loosen the screw too much when opening the blades for this type of hair. If you don't return the scissor tension to the proper level after working with long hairs, you may think your blades are dull by the time you start working on your next customer.
Narrow the scissor opening for shorter, stubborn hairs. Having more tension on the blades will help groomers work with stubborn hairs or cut closer for puppies with shorter hairs. If the blades are too tight for a long time, you may start to dull them from overuse.