3M 7000031578 Varnished Cambric Electrical Tape

Product Description

The 3M 7000031578 is a varnished cambric electrical insulating tape designed for use in motor, transformer, and coil insulation applications. It is constructed from straight-cut woven cotton cambric fabric that is oil primed and finished with a high-grade yellow electrical insulating varnish. The tape measures 0.75 inches wide by 60 feet long per roll. Its flexible construction allows it to conform to irregular winding surfaces while maintaining electrical insulation integrity. Electricians and motor winding technicians use this tape when a smooth, moisture-resistant insulating layer is required in high-temperature or oil-exposed environments.

This tape is suited for residential and commercial electrical applications where varnished cambric insulation is specified. Typical uses include layer insulation in motor windings, transformer coil wrapping, and slot cell insulation. It performs in environments where contact with oils or moderate moisture is expected, and its smooth finish reduces friction against adjacent conductors or winding layers. This product is sold by the roll with a minimum order quantity of 20 rolls.

Key Features

• Straight-cut woven cotton cambric fabric construction for consistent width and conformability
• Oil-primed fabric base for compatibility in oil-exposed winding environments
• High-grade yellow electrical insulating varnish coating
• Moisture-resistant finish suitable for coil and motor winding service
• Smooth surface finish reduces friction during winding assembly
• Each roll is 0.75 inches wide by 60 feet long

Compatibility

Designed as an OEM-style insulating tape for use in motor, transformer, and coil winding applications where varnished cambric material is specified.

Installation Notes

Installation of varnished cambric tape in motor or transformer windings is typically performed by licensed electricians or qualified motor winding technicians. De-energize and lock out all equipment before beginning any winding or re-insulation work, following NFPA 70E electrical safety procedures. Apply the tape with consistent tension to avoid gaps or overlaps that could compromise insulation integrity. Do not stretch the tape beyond its natural flexibility, as this may compromise the varnish coating.

Technical Specifications

• Width: 0.75 inches
• Length: 60 feet per roll
• Weight: 0.23 pounds
• Material: Woven cotton cambric fabric with yellow electrical insulating varnish
• Unit of Measure: Roll
• Minimum Order Quantity: 20
• UPC: 00054007417200

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000031578