PTFE Coated Mandrels
304 SS Fine Wire Mandrels in stock from .004" - .060", PTFE coated and uncoated wire. Quick turn, low minimum orders.

New proprietary technology permits coating of fine wire with a thin, smooth, pinhole-free finish of Teflon®-PTFE fluoropolymer resin to provide release or slip properties and/or electrical insulation.

Applications include providing an internal forming mandrel for extrusion of small-diameter plastic tubing with extremely accurate bore and use as magnet wire in electrical coils.

Release coating thickness is typically 0.0002 ±0.0001 in. (5.1 µm ±2.5 µm). For electrical insulation, coating thickness is typically 0.001 in. (25.4 µm).

The manufacturer has coated silver-plated copper wire with diameters from 0.012 to 0.080 in. (0.3 to 2.0 mm) and on stainless steel wire from 0.001 to 0.040 in. (25 µm to 1 mm) in diameter.

Mandrels and Guidewires
DSA’s principal combines the highest technology in CNC controlled equipment and master grinders with decades of experience.

Product capabilities include:

• CNC Grinding to < 0.002” over a full length corewire
• Grinding tolerances to +/- 0.0002” in metals and plastics
• Diameters from < 0.002” to > 0.250”
• Step mandrels with two or more diameters: precise transitions and interior lengths
• Tapered mandrels with long transitions between diameters and strict tolerances on configurations
• “D” mandrels precisely flattened on one side to exact tolerance at competitive cost
• End rounding: simple deburring, chamfering or precise spherical radii.
• Passivating and polishing
• Coatings with PTFE and parylene for enhanced lubricity and release
• Annealing for enhanced flexibility and certified ductility

Braiding and Assemblies
Focused on the the custom fabrication of miniature components and subassemblies for the medical device industry, DSA’s principal is specialized in braiding technology, wire and filament assembly.

• Braiding in continuous or discrete lengths in wire sizes to below .001”. Customer requirements for surface coverage, braid angle, expansion ratio, porosity, pick count gradients and material combinations guide production.
• Unique shaped wire assemblies and arrays using silver-soldering, brazing, welding, adhesives and other methods, typically using microscopic assembly.
• Materials include a full range of standard and special metals, as well as non-metallic fibres such as Kevlar, Vectran, Spectra, or polyester which can be incorporated into a primarily metallic design or used exclusively.