In karting, safety and performance also derive from a simple gesture such as tightening each individual threaded element. To precisely adjust and verify the torque to be applied to bolts, screws and nuts during their tightening, the use of the torque wrench is a must. Its use is essential for the assembly of some specific components (such as, for example, the fastening screws of the crankcase, head and cylinder of the engine) because of the forces to which they are subjected to and because in some championships the regulations require certain tightening torques. The panorama of torque wrenches, however, is really very varied, with many manufacturers and just as many sales channels. This is why, to help you find your way around, we present four torque wrenches: three "snap-on" wrenches, the most common and intuitive analog type to use, which signals the achievement of the set torque value in an audible, visible and tactile way; the last is digital and, together with the highest standards of precision, offers additional features that can greatly facilitate working on a kart. All the keys, however, have the same features mentioned below:

• an adjustment range of approximately 10 to 60 Nm, the most suitable for karting;
• although they have a reversible ratchet head, which makes them usable both clockwise and counterclockwise, they ensure compliance with the tightening torque (according to the tolerance indicated) only for the tightening of right-handed threads. Why? This is the most common type of thread in karting both for the chassis and engines (for engines, with the exception of the clutch pack closing nut, which is tightened left-hand);
• they are supplied with calibration certificates. These documents ensure that the keys are tested in-house by companies according to internationally defined procedures (such as DIN EN ISO 6789) to check compliance with the tolerances they are marketed with before they are sold.

Our proposals meet different needs both in terms of available budget and in terms of use. In addition, they will also be useful for evaluating other products, apart from those mentioned in this article.  

N.B. Do you think there are other products that can be added to this selection? Don't hesitate to share them with other TKART users in the "Contributions" section at the end of the article. The community will be grateful to you!