Fort Wayne Metals Helical Hollow Strand® (HHS) furthers our excellence in stranding and cabling of medical grade wire. HHS is a Fort Wayne Metals stranded wire with an open center working channel. HHS is manufactured using wire material drawn by Fort Wayne Metals. HHS has excellent whip free characteristics, and can be made highly kink resistant. Designs can be tailored to customer requirements of tension, compression, torque and pitch direction.

Features and Benefits

HHS Tube is a stranded wire with an open center working channel which can be constructed of numerous material types all drawn on site. HHS Tube designs are tailored to customer specifications of dimension, tension, compression, torque, and pitch direction while exhibiting high kink resistance and excellent whip free characteristics. Single, dual and triple layer HHS Tube can be manufactured for varying flexibility and control with differing filar counts and sizes per layer.

Applications

Specification

Helical Hollow Strands are designed using solid modeling according to mathematical formulas. Using parametric design, many design considerations can be evaluated in a short time. Materials are normally spring temper. Nitinol HHS is provided in the superelastic condition. Flexibility can be influenced by design variables including ID, OD, Wire Size, Filar Count and other processing.

• Inside Diameter: 0.001" (0.0254mm) to 0.130" (3.302mm)
• Outside Diameter: 0.0025" (0.0635mm) to 0.160" (4.064mm)
• Filars 6 to 18
• Layers 1 to 3 (more may be available)
• Lengths from 1” to 10' (longer possible depending on design)
• Pitch Left, Right, Unidirectional, Reverse

Secondary Operations

• Customer specified performance testing: Droop, Compression, Yield (elongation at load) or Torque
• Square cut ends
• Chamfering
• Formed HHS
• Welding
• OD Step Grinding
• Soldering
• Taper Ground
• Coatings (see spec sheet)
• Assembly

Materials