SCREW DRIVER

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SCREW DRIVER

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Product Description

Product Specification :

Product Specification: Screwdriver

A Screwdriver is a manual or powered tool used for turning (installing or removing) screws. It consists of a handle, a shaft (shank), and a specific tip shaped to fit into the head of a corresponding screw.

1. Anatomy of a Screwdriver

Handle: Designed for grip and torque. Modern handles are typically bi-material (plastic and rubber) for comfort and slip resistance.
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Shank (Shaft): A hardened steel bar connecting the handle to the tip. Can be round (standard) or square (allowing a wrench to be attached for extra leverage).
Tip (Drive): The business end. Must be precision-machined to match the screw head geometry exactly.

2. Common Tip Types (Drive Systems)

Type	Description	Common Use
Slotted (Flathead)	A single flat blade.	Basic carpentry, antique furniture, electrical plates.
Phillips	Cross-shaped ($+$). Designed to "cam out" (slip) under high torque to prevent over-tightening.	General construction, household electronics.
Pozidriv	Similar to Phillips but with an extra "tick" mark ($*$). Does not cam out; allows higher torque.	European cabinetry, automotive.
Torx (Star)	Six-point star shape. Provides very high torque transfer without slipping.	Automotive, computers, deck screws.
Robertson (Square)	Square-shaped tip. Highly popular in Canada; excellent grip and one-handed use.	Decking, electrical boxes.
Hex (Allen)	Hexagonal tip for internal socket screws.	Flat-pack furniture (IKEA), bicycles.

3. Material & Construction

Shank Material: Usually Chrome Vanadium (Cr-V) or S2 Tool Steel (for professional/high-impact use).
Tip Finish: Often Black Phosphate or Sand-blasted for increased friction and to prevent the chrome plating from peeling into the screw head.
Hardness: Tips are heat-treated to 52–60 HRC to resist wearing down the edges.

4. Technical Variations

Insulated Screwdrivers: Coated in a non-conductive material (usually rated for 1,000V AC) for safe electrical work. Look for the VDE certification mark.
Precision Screwdrivers: Small, thin tools with a rotating "spinner cap" on the handle, used for watches, eyeglasses, and electronics.
Ratchet Screwdrivers: Features a mechanism that allows the handle to turn back and forth while only driving the screw in one direction, reducing wrist fatigue.
Magnetic Tips: Often magnetized to hold steel screws in place, which is essential for one-handed reach into tight gaps.

5. Standard Sizing

Phillips/Pozidriv: Sized by numbers (#00, #0, #1, #2, #3). #2 is the most common for household use.
Slotted: Sized by blade width (e.g., 3mm, 5.5mm, 8mm) and shank length.