7-1/4" Triplex Garage Door Torsion Spring Cone Kit – 1" Bore, 2-Piece Set with Hardware

1" Bore with Hardware

• Category: Cones & Fillers
  
• Fast shipping — same-day on orders before 4:30 PM EST

• Product Description

  The 7-1/4" Triplex Garage Door Torsion Spring Cone Kit is designed for assembling compatible heavy-duty triplex torsion spring systems used on commercial, industrial, and other high-load garage doors.

  A triplex spring assembly uses three nested torsion springs to provide substantial lifting capacity while helping reduce the overall space required for the spring system. This two-piece kit provides the end components needed for a compatible 7-1/4-inch triplex torsion spring assembly.

  The kit features a 1-inch center bore for installation on a compatible 1-inch torsion shaft and includes the required assembly hardware. It supports torsion spring wire sizes up to .4375 inch.

  Specifications

  • Product type: Triplex torsion spring cone kit
  • Nominal spring size: 7-1/4 inches
  • Shaft bore: 1 inch
  • Maximum spring wire size: .4375 inch
  • Configuration: Two-piece kit
  • Hardware: Included
  • Application: Triplex torsion spring assemblies
  • Quantity: One complete two-piece kit

  Common Uses

  This triplex spring kit is commonly used for:

  • Heavy commercial sectional garage doors
  • Industrial overhead doors
  • Large or high-weight garage doors
  • Three-spring nested torsion assemblies
  • Replacement or fabrication of compatible triplex spring systems
  • Applications requiring substantial lifting capacity in a limited spring-assembly space

  Compatibility and Fitment

  This kit is intended for compatible 7-1/4-inch triplex torsion spring assemblies installed on a 1-inch torsion shaft.

  Before ordering, confirm:

  • The required triplex spring configuration
  • The spring assembly’s nominal diameter
  • The torsion shaft diameter
  • The spring wire sizes
  • The required winding direction
  • The spring lengths and lifting requirements
  • The existing cone and mounting configuration

  This is a specialized spring-assembly component and should not be selected solely by visual appearance.

  Important Matching Notes

  Triplex torsion spring systems contain multiple nested springs that must be engineered to work together. Each spring’s wire size, inside diameter, length, wind direction, and torque contribution must match the door’s weight and operating requirements.

  The 7-1/4-inch measurement identifies the compatible triplex spring assembly size. The center bore is designed for a 1-inch torsion shaft.

  Maximum compatible spring wire size is .4375 inch.

  This product is the cone and hardware kit only. Torsion springs, shaft, drums, cables, bearings, and other spring-system components are not included unless specifically stated elsewhere in the listing.

  Package Contents

  • One 7-1/4-inch triplex spring winding-side component
  • One 7-1/4-inch triplex spring stationary-side component
  • Required assembly hardware

  Installation Notes

  Installation requires correctly fabricated torsion springs, a compatible 1-inch shaft, proper spring orientation, secure stationary mounting, and appropriate winding equipment.

  All components must be inspected before installation. Do not use the kit with damaged springs, worn shafts, incorrect fasteners, distorted mounting surfaces, or incompatible spring dimensions.

  The completed spring assembly must be properly balanced to the actual garage door weight.

  Safety Warning

  Triplex torsion spring systems operate under extremely high mechanical tension. Incorrect spring selection, assembly, winding, or installation can cause sudden component movement, severe injury, death, or major property damage.

  Installation and adjustment should be performed only by a trained garage door professional experienced with commercial torsion and nested triplex spring systems.

  Never loosen, remove, modify, or wind torsion spring components without securing the garage door and safely controlling all stored spring tension.

  SEO Title: 7-1/4" Triplex Torsion Spring Cone Kit – 1" Bore

  Meta Description: Shop a 7-1/4-inch triplex garage door torsion spring cone kit with 1-inch bore, two-piece construction, included hardware, and support for wire sizes up to .4375 inch.