1/2 3/8 1/4 Square Drive Extendable Flex Head Quick Release Ratchet Handle

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Product Description

 

Tooth	45/72 Teeth
Length	90mm
Width	28mm
Height	26mm
Material	Alloy Steel
Torque N. m	DIN*1.3
Surface Treatment	Chrome/matt finish
Operation Life	More than 50000 times
Packaging	Cartons + Pallets
Brand	Union
Certification	CE, EMC, RoHS, UL, GS, PROP65
Origin	China

Ratchet

The is a popular hand tool that provides the ability to turn sockets, fasteners, and other attachments in a tight space. Featuring a gear mechanism that only allows motion in one direction, the ratchet allows the user to swing the handle back and forth to gradually tighten or loosen whatever is engaged with the socket or attachment.

Ratchets come in a wide variety of sizes, drive sizes, handle lengths, and configurations to suit various applications. A typical ratchet consists of a cylindrical head with the gearing mechanism inside and a lever handle protruding out to allow the user to apply torque. The head has a square drive lug on the end that accepts different-sized detachable sockets, extensions, adapters, and bits. Common drive sizes are 1/4", 3/8", and 1/2", indicating the size of the square lug and sockets used.

The key component that gives the ratchet its function is the reversible gearing mechanism inside the head. It allows continuous rotary motion in one direction while slipping in the opposite direction when the handle is reversed. This allows the user to quickly swing the handle back and forth while the socket turns incrementally in the set direction. A switch, button, or lever on the head is used to reverse the gearing and the direction of rotation.

Main Fastener Coating
Types	Application	Spray Test Hours	Characteristics
Mirror Nickel-plating	ALL Metal	72Hours	Stable Excellent polishing performance Improve Wear resistance Wide range of applications
Matt Nickel-plating	ALL Metal	72Hours
Black Nickel-plating	ALL Metal	48Hours	High absorption rate of solar energy Used in solar collector panels.
Manganese Phosphate	ALL Metal	72Hours	Enhanced resistance
Sand Blast	ALL Metal	-	Remove paint, rust, and residue scratches or casting marks
Electrophoresis	ALL Metal	1000Hours	Maintain metallic luster Anti-corrosion properties
Color Electroplating	ALL Metal	96Hours	Improve mental strength Prevent metal oxidation

 

Steel Material  Chemical Composition
Types	C	Si	V	Cr	Mn	Ni	Mo	Characteristic
CR-MO	0.18-0.23	0.15-0.35	-	0.40-0.60	0.90-1.20	-	0.13-0.20	41xx-series SAE steel grades Excellent strength-to-weight ratio Stronger and harder Not easily welded
CRV	0.5	0.3	0.18	0.80-1.10	0.70-0.90	-	-	6000-series SAE steel grades Suitable for hardening Resist abrasion, oxidation, and corrosion Improve material elasticity
S2	0.40-0.55	0.90-1.20	<0.50	-	0.30-0.50	<0.30	0.30-0.60	One of seven types of shock-resisting steels under the AISI Classification High strength High toughness Wear resistance High hardness Resistance to shock loading
45#	0.42-0.05	0.17-0.37	-	≤0.25	0.50-0.80	≤0.25	-	Compared with  A3, it has higher strength and resistance to deformation.
A3	0.95-1.05	0.10-0.50	0.15-0.50	4.75-5.50	0.40-1.00	-	0.90-1.40	High-quality high carbon alloy tool steel

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