WINDWELL :::::::::::::::::::::::::Grooved Drums ::::::::::::::::::::::::

Material	Type of Yarn
	Cotton, Hairy Yarn.
	Acrylic Fiber, Man made Fiber Blends.
	Wool, Jute, Natural man made Fiber Blends.

Feature :

• Super finish, Light Weight and lower inertia.

• Uniform Package Density, even in soft dye packages,

• Ceramic insert at apexes and crossing points for more durability.

• Thick & Uniform layer of hard anodic coating, no peeling off.

• Abrasion as well as corrosion resistant.

• Superior in hardness and low coefficient of friction.

Windwell Hard anodized Drums for Lasting performance

The Hard Anodizing ( Anodic Oxidation ) : A surface treatment of aluminum, which converted into a layer of hard oxidation Aluminum having specific depth with superiority in hardness, Coating thickness, Anti-Abrasion and low coefficient of friction.

Hardness :
The hardness of hard anodized drums are 495-534 BHN and increase towards inside.

Comparison of Hardness

Bakelite Traverse drum	33-56
Uncoated aluminum Traverse Drum	90-100
Cast Iron Traverse Drum	115-200
Hard Anodized Traverse drum	495-534
Hard Chrome	601-745
Engineering File	610-682

Coating thickness :

The coating thickness of hard anodized drums is high and reaches to 60-80 microns.

Anti Abrasion :

The Hard anodized drums have excellent anti-abrasion characteristic than Mild Seel and Hard Chorme plated drums.

Coefficient of friction :

Coefficient of friction for hard anodized drum is low because surface layer is porous and only tipped part of it comes in contact with running yarn.