Almost every man in the house has a screwdriver, a tool without which not one small construction site or house repairs can do. Everyone knows that a regular screwdriver requires ordinary slotted bits.
At the beginning of the "era" of "shurovertotization" there were no questions about the "shura" equipment. You go into the store, buy the bat you want, and go home.
Recently, "torsion bats" have appeared on the shelves. And, by the way, they cannot be installed on a regular screwdriver. This is the opinion I heard from a salesperson talking about accessories in the power tool sales department.
Is it so? Now I'll tell you:
First, you need to understand what is regular bits and that they represent them. And they are a metal blank from a certain solid alloy, which has been shaped for a certain type of splines of your screws (PZ 1/2/3 or PH 1/2/3, etc.). The task of this rig is to evenly transfer the rotation from the chuck to the screws. A sort of adapter.
Torsion bits, on the other hand, have a slightly different task and it is made for a certain type of tool - screwdrivers with a percussion mechanism that transmits micro-impacts on the bit head. But not axial impacts like hammer drills, but rotary impacts like impact wrenches. Thus, the maximum load occurs on the bit slots.
A vivid example of this is my MAKITA tool, which I got at a construction site, it is very pleasant to work with it, it turns screws and screws without much effort on my part. The percussion technique drives the screws into place.
Such micro-impacts will naturally load the spline of conventional bits very strongly. Which will lead to their breakdown. Therefore, a spring-loaded bit, the Torsion Bar, was invented.
A spring-loaded bit differs from a conventional one in that it has a thinner metal rod in the bit body. Usually this place is indicated by an insert made of bright plastic.
This thinner "insert" of metal works like a torsion spring under shock loading. Such a bit does not immediately transfer the force to the screw, but rather slightly accumulates the impact energy and relatively, gradually, transfers it to the screwed-in hardware.
Thus, the bits are kept intact, the screws do not wear out and do not break off from sharp shock loads.
Hence the conclusion follows: Regular bits are undesirable to use in impact screwdrivers, because there is no "spring" to protect the bit splines from early wear. In addition, the mechanisms of the "shura" suffer because of the tougher blows, which will lead to the rapid wear of the latter.
Accordingly, the use of torsion bits in a conventional screwdriver leads to a different effect, the springiness of the bit reduces the rigidity when screwing in hardware. That increases the number of breaks of the bit from the seat of the screw. Accordingly, this increases the wear of the tooling.
These are the conclusions from "Timofey Mikhalov". What do you think about this.