Standard classification and characteristics of screws

(How to choose screws for electric screwdriver industrial？)

The study or design of the function, structure, and parameters of any power tool should start from the study of the object of work. Only by understanding the actual requirements of the working objects on the power tools can the products have the value of promotion and use. How to choose excellent electric screwdriver industrial screws? According to the material classification, easy to cut steel, high strength steel, copper, even plastic stool: according to the screw head, there are hexagon head, square head, hexagon, square, half-round head, countersunk head, a word groove, cross groove; there are fastening screw, positioning , stop screw, ring, foot screw and so on. However, the classification closely related to screw mounting characteristics is what we will discuss.

Mechanical screws for electric screwdriver industrial

Like bolts, it has standard common threads (metric, imperial, and fine thread), and the distinct don’t very clear. According to the fastener standard distinction: with a word groove, cross groove, hexagonal hole cylindrical, semi-circular head and countersunk head, screw diameter m1.6-m1.0 (hexagonal m1.6-m36) is called machine screw. Other head types (commonly used is a hexagonal head, square head) thread diameter m3-m64 is a bolt. It can be used in an industrial electric screwdriver.

And the same specification of assembly bolts, nuts of the electric wrench, then the electric screwdriver torque is much larger, because of the cross groove, a groove to withstand the torque than hexagon or square screw head much smaller. Because of this, the strength grade of the screw of one-word groove, a cross groove is mostly below 4.8. Therefore, its assembly torque and axial load (tension) are less than the bolt. The same situation will be found in the industrial electric screwdriver. Of course, it is not rejected to use an electric screwdriver to assemble bolts and nuts of smaller specifications, nor is it rejected to use the electric wrench to assemble hexagon socket head screws of larger specifications.

Self-tapping screw for electric screwdriver industrial

General heat treatment HRC50-58, in the assembly of the workpiece, can be directly tapped on the hole reserved. Especially for an industrial electric screwdriver. And the completion of a threaded connection. There are three types according to usage. thread forming screw

According to the tail part, there are the following four types:

A: 30° angular tip end, perforated to join sheet metal, sometimes used instead of wood screws.

B: blunt end, smaller pitch than type A, suitable for heavier sheet metal and nonferrous metal castings.

AB: end like A, pitch like B, can use plastic or zinc die castings, also can use as wood screws.

• For replacing thread forming screws to reduce tapping torque and internal stress. There are six types, of which DGFT iv has machine screw threads. And a blunt difficult end with a break groove. Using for all kinds of die casting, cast iron, brass, plastic, and steel.BF and BT models also have an auxiliary cutting edge and a larger cutting storage tank at the end. It can use for all kinds of plastic parts and composite parts.
• Thread rolling screw

Self-tapping bolt it has arc triangular wearing surface thread. After hardening can screw into the black metal or non-ferrous metal prefabricated hole, extrusion to form a meshing thread. The strength of the connection increasing by cold hardening by extrusion. This special form of the screw has low torque, high locking performance, better performance than an ordinary self-tapping screw.

Now you know how to choose screws for electric screwdriver industrial (another saying way is an industrial electric screwdriver).

If any other questions about the electric screwdriver industrial, please write a comment to us or send us an email. Your feedback will be very important to us.