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A screwdriver is a common manual tool mainly used to tighten or loosen screws. It can be classified in various ways, and the following will introduce it in detail from different dimensions:
Classified by head shape
One word (flat head) screwdriver
Appearance: The blade is flat and matches the slot of the slotted screw.
Usage: Suitable for disassembling and assembling slotted screws, widely used in the installation and maintenance of electronic products, furniture, appliances, etc.
Features: The structure is simple and easy to use, but due to the small contact area between the blade and the screw groove, it is prone to slipping when turned, which may damage the screw groove or the screwdriver itself.
Phillips screwdriver
Appearance: The blade is in a cross shape, corresponding to the groove of the cross slot screw.
Usage: Commonly used for the operation of cross slot screws, widely applied in fields such as mechanical manufacturing, automotive maintenance, and electronic equipment.
Features: Compared to a straight screwdriver, a cross screwdriver has a tighter contact between the blade and the screw slot when turned, which can better transmit torque and reduce slippage. However, excessive torque may still cause damage to the screwdriver head or screw.
Mi shaped screwdriver
Appearance: The blade is in the shape of a rice, with multiple protrusions that fit into the grooves of the rice slot screws.
Purpose: Mainly used for some specially designed square slot screws, such as screws on certain optical instruments and precision equipment.
Features: It can provide more stable connections and greater torque transmission, but due to relatively limited usage scenarios, it is not a common universal tool.
hex screwdriver
Appearance: The blade is hexagonal and can be divided into two types: inner hexagonal and outer hexagonal. The blade of the hexagonal screwdriver is a hexagonal cylinder, used to turn the hexagonal screw; An external hexagonal screwdriver is similar to a socket and is used to turn external hexagonal bolts or nuts.
Usage: Widely used in fields such as mechanical assembly, automotive maintenance, furniture assembly, etc. Many screws on bicycles and motorcycles adopt an internal hexagonal design.
Features: The hexagonal screwdriver can hide the screw head inside the part, making the appearance more beautiful and able to withstand greater torque; An external hexagonal screwdriver is convenient for use in larger spaces.
Star shaped (plum blossom) screwdriver
Appearance: The blade is star shaped with multiple teeth that match the slots of the star shaped slot screws.
Usage: Commonly used for screw disassembly and assembly of precision equipment such as electronic products, laptops, and mobile phones.
Features: It can provide good anti slip effect, prevent the screwdriver from slipping during the twisting process, and protect the screws and equipment from damage.
Square head screwdriver
Appearance: The blade is square and matches the slot of the square head screw.
Usage: It is still used in some old-fashioned mechanical equipment, building structures, and other fields.
Features: Simple structure, able to withstand large torque, but due to the gradual decrease in the use of square head screws, square head screwdrivers are relatively less common.
Classified by power source
manual screwdriver
Appearance: Usually composed of a blade head and a handle, the handle has various shapes and materials, including plastic, rubber, wood, etc.
Purpose: Suitable for various small-scale screw disassembly and assembly work, such as home maintenance, electronic product assembly, etc.
Features: Flexible operation, low cost, no need for additional power equipment, but manual torque application is required, which may be more laborious to operate tight screws.
electric screwdriver
Appearance: Generally composed of a motor, battery (or power cord), transmission mechanism, and blade, resembling a handgun or straight handle in appearance.
Usage: Widely used in large-scale production assembly lines, furniture manufacturing, automotive maintenance and other industries, it can greatly improve work efficiency.
Features: Driven by a motor, it can provide a large torque and can quickly turn screws, but the price is relatively high and requires charging or connecting to a power source for use.
pneumatic screwdriver
Appearance: It mainly consists of a pneumatic motor, transmission mechanism, and cutting head, and requires connection to an air compressor to provide power.
Usage: Commonly used in fields such as automobile manufacturing, aerospace, and mechanical processing that require high work efficiency and quality.
Features: Strong power, high speed, able to quickly tighten or loosen a large number of screws, but requires equipment such as an air compressor, high operating cost, and generates certain noise during operation.
Classified by handle form
Straight handle screwdriver
Appearance: The handle and blade are in the same straight line, with a relatively simple shape.
Purpose: Suitable for screw disassembly and assembly operations in open spaces.
Characteristics: The structure is simple, easy to manufacture, and the grip is relatively direct, but it may not be convenient to operate at certain special angles.
Curved handle screwdriver
Appearance: The handle and blade are bent at a certain angle, commonly at 90 °, 120 °, etc.
Usage: Mainly used for turning screws in narrow spaces or special angles, such as inside electrical appliances, corners of mechanical equipment, etc.
Features: It can make the operation more flexible and facilitate screw disassembly and assembly in difficult to reach positions, but the bent part may affect the efficiency of torque transmission.
T-shaped screwdriver
Appearance: The handle is T-shaped, and the blade is vertically connected to one end of the handle.
Purpose: Suitable for screw disassembly and assembly work that requires a large torque, such as bolt tightening for some large mechanical equipment.
Features: The T-shaped handle can provide a longer lever arm, allowing the operator to apply greater torque more easily, but its relatively large size makes it less suitable for use in narrow spaces.