Specification of the most popular screwdriver

Specifications of common screwdriver

specifications of common screwdriver models are as follows:

Star application scope hexagon: T3, T4, T5, T6, T7, T8, T9, T10 (almost all hexagon screws can be removed)

M shape (U shape, fork shape): m2.6 (the most common specification of U shape screwdriver)

y shape (triangle): y2.0 Y3.0 (y-screw, PHS, seat charger, etc., take all)

▲ type: 2.0, 2.3 (remove some triangular screws, which are rarely used, but it is necessary to be standby)

★ type: 1, 2 (special pentagonal screws are also removed)

Cross: 1.0, 1.5, 2.0, 3.0 (PSP, MP4, MP3, digital, etc.)

word: 1.0, 1.5, 2.0, 3.0 (clock series)

hexagon socket: H1.5, h2.0, h2.5, h3.0 As experts in the petrochemical field, H4 and other

screwdrivers do not have round heads, because round heads are not twisted at all. One word is to ensure that there are twists and turns, and the cross can make the power distribution more uniform

according to the power source, there are manual screwdriver and electric screwdriver; According to the batch head or knife head, there are flat head and Phillips

in the industry, it is based on the batch leader

it has two sizes One kind of vehicle that people will also improve the endurance and sports performance is the metric system, which we often say is in mm For example, the sizes mentioned above There is also the British system, which is in inches, for example, 1/4,3/16. Multiplying this number by 25 is the metric size

1. The model of slotted screwdriver is expressed as the head width * tool bar. Example 2 × 75mm means that the width of the cutter head is 2mm and the length of the rod is 75mm (not the full length)

2. The model of the cross screwdriver is represented by the size of the head * the shank. For example, 2 ＃ × 75mm means that the cutter head is No. 2 and the length of the metal rod is 75mm (not the full length). Some manufacturers use pH2 to represent 2, which is actually the same. You can roughly estimate the size of the cutter head by the thickness of the cutter bar, but in industry, it is distinguished by the size of the cutter head. Model polyethylene pipe resistance to slow crack growth cone test method gb/t 19279 ⑵ 003 ISO 13480:1997 is 0, 1, 2, 3, the corresponding metal rod thickness is approximately 3.0mm, 5.0mm, 6.0mm, 8.0mm

the head of a high-quality screwdriver is made of spring steel with high hardness

a good screwdriver should be hard but not brittle, and there is stitching in the hard. When the opening of the screw head becomes bald and slippery, you can tap the screwdriver with a hammer to make the groove of the screw deeper, which is convenient for screwing off the screw. The screwdriver should be intact; Screwdriver is often used to pry things, which requires a certain toughness without bending. In general, it is hoped that the hardness of the screwdriver head is greater than HRC60 and is not easy to rust