Design Guide

When designing chemically machined parts, there are certain guidelines which will help expedite production.

Design Guide

Dimensions & Tolerances

There are a few design rules which express practical limitations when the dimensions under consideration approach the thickness of the metal. The most common rules are as follows:

  • Inside Radius (IR) = Material Thickness (T)
  • Outside Radius (OR) = 75% of Material Thickness (T)
  • Hole Diameter (D) = 110% of Material Thickness (T)
  • Bevel (B) = 10% of Material Thickness (T)
  • Space between Holes (W) = 110% of Material Thickness (T)
  • Center to Center (C/C) = Artwork

Typical Tolerances are +/- 10% of material thickness (T)

The etching process creates a bevel (B). As a rule of thumb when etching from two sides the bevel (B) is approximately 10% of the metal thickness.

Design Guide

Metals

Italix has the capability to chemically machine the following materials:

  • Good

    • Alloy 42, Alloy46, Alloy 52, Brass, Copper (C101, C102, C110, C151 copper, C17200 Beryllium copper, C19210 copper, C194 copper) Copper Nickel, Constantan, Cold Rolled Steel, Copper clad Duroid, HyMu (80 & 800), Inconel 600, Inconel X 750, Invar 36, Kovar, Ni-Silver, Nickel 200 & 201, Permanickel, Phosphor Bronze, Spring Steel, Stainless Steel (Ph 15-7, Ph 17-7, 301, 302, 304, 305, 316, 321, 347, 410, 420, 430, & 215), Vandium
  • Good to Fair

    • Aluminum, Gold, Monel, Ni-Chrom 80-20
  • Common Thickness Range

    • 0.0002 in. (0.005 mm) to 0.125 in. (3.175 mm)

Examples of Parts Produced by Italix

  • Aperture Strips
  • Anodes
  • Bearing Retainers
  • Bookmarks
  • Bus Bars
  • Cams
  • Carrier Plates
  • Cathodes
  • Cavity Lids
  • Chip Carriers
  • Circuit Plates
  • Christmas Ornaments
  • Contacts
  • Contact Arms
  • Clip Fingers
  • Covers, Solder Seal
  • Covers, Seam Seal
  • Covers, Laser Weld
  • Diaphragms
  • Discs
  • Drive Bands
  • Electrical Connectors
  • Electrodes
  • Electron Tube Shielding
  • Electronic Chassis
  • Elements
  • EMI Shielding
  • Encoder Discs
  • Extendible Antennas
  • Filter Elements
  • Filter Supports
  • Flat Springs
  • Flexures
  • Front Panels
  • Fuel Cell Anodes & Cathodes
  • Fuel Nozzles
  • Grids
  • Ground Springs
  • Heat Sinks
  • Heater Elements
  • I.D. Plates
  • Instrument Dials
  • Instrument Gears
  • Integrated Circuit Connectors
  • Jewelry, All Finishes
  • Abrasive Blasting
  • Laminations
  • Lids
  • Leadframes
  • Magnetic Recording Head Laminations
  • Masks, Evaporation
  • Magnetic Shielding
  • Medical Devices: External & Implantable Medical instrument Probe Shields
  • Metal Scales
  • Metal Stencils
  • Microelectronic Masks
  • Micro Forceps
  • Microwave Components
  • Motor Laminations
  • Name Plates
  • Ornaments
  • Pressure Sensing Diaphragms
  • Radar and RF Antennas
  • Retainers
  • Retaining Rings
  • Reticles
  • Ribbon Shields
  • RF Shielding
  • Rotor Brushes
  • Rotor Switches
  • Screens - All Types
  • Shaft Encoders
  • Shaped Shims
  • Shims
  • Shutter Blades
  • Springs
  • Spring Clips
  • Step Lids
  • Strain Gauges
  • Strap Suspension Assemblies
  • Surgical Blades
  • Survival Blades
  • Switch Blades
  • Thermal Planes
  • Thermal Switch Components
  • Tooling Templates
  • Translators
  • Washers
  • Vacuum Masks