Ball pin seat rough

A socket wrench classification:

(1) According to the size (referring to the size of the square head): 1/4 ″, 3/8 ″, and 1/2 ″. "means inch, and 1 ″ is equal to 25.4MM

(2) According to length: long sleeve, short sleeve, E-shaped sleeve

(3) By side: 6 corners, 12 corners, 4 corners;

(4) Appearance: single ditch and double ditch; Knurling; Straight cylinder; Nickel and chromium plating, etc

(5) Usage: There are manual socket wrench and pneumatic socket wrench (black, chrome molybdenum steel) (6) Different according to the screws: outer hexagon socket, outer box socket; Hexagon socket, hexagonal socket, 12 pattern socket; E type sleeve, five corner press fit sleeve, five corner hollow press fit sleeve, four corner sleeve, etc.

II. Mold surface treatment by mold manufacturer

(1) Bright chrome: like a mirror, very bright

(2) Chrome: matt

(3) Electrophoresis: black, bright. Under the action of the external DC power supply, the charged particles move directionally towards the cathode or anode in the dispersed medium to promote the separation of substances;

(4) Phosphating: black, but dull. Immerse the sleeve into the phosphating solution, and deposit a layer of water-insoluble crystalline phosphorus on the surface, which is the conversion process of phosphate.

III. Manufacturing Process

Blank (various specifications) -- grinding (removing burrs, etc.) -- turning (mainly forming) -- grinding surface -- engraving (such as knurling, printing LOGO, etc.) -- heat treatment (to increase its hardness) -- electroplating (nickel or chromium plating, etc.) -- black seizing, etc

IV. Distinguish between good and bad

(1) Look at the surface: whether there are burrs, whether the specifications meet the size standards, whether there are scratches, etc. (2) Internal quality: measure the torque and hardness with special tools; Measurement size; Salt spray test, etc