Secondary Operation

Typical Parts

Objectives

Coining Objective

All

Densification, dimensional control

Sizing

All

Dimensional control

Secondary Operation

Typical Parts

Objectives

Resin

Structural

Improve machinability. Prepare surface for plating with other metals. Seal parts gas or liquid tight.

Secondary Operation

Typical Parts

Objectives

Quench and Temper

Ferrous Structural

Improve strength and hardness 

Steam treat

Ferrous

Make surface hard and wear resistant. Improve corrosion resistance and seal porosity.  Provides a black/blue surface appearance for coloration needs.

Secondary Operation

Typical Parts

Objectives

Drill and Tap

All

To install set or assembly screws.

Turning

All

Machine to exact tolerances. Form undercuts not possible with punch and die tooling.

Milling

All

Form undercuts or slots.

Grinding

All

Remove stock, make faces parallel, and improve surface finish and tolerances.

Honing

All

Improved dimensional control.

Secondary Operation

Typical Parts

Objectives

Deburring

All

Smooths edges related to parting lines.

Burnishing

Ferrous Structural

Ball size, roller burnish for size control and surface finish.

Coating Oil Dip

Ferrous

Corrosion resistance. Lubrication

Copper, Nickel Zinc Plating

Ferrous

Corrosion resistance, appearance.

Welding

Ferrous, 6.8 g/cm min. density

Makes assemblies from two or more parts.

Black Oxide

Ferrous, resin impregnated

Corrosion resistance, paint base.

Mechanical Surface Treatments: Glass Beading Wire Brush, Sanding

All

Clean, improve surface.

Coating

Ferrous

High corrosion resistance.

Tumbling/ Vibratory Finishing, Grit Blasting

All

Improve surface fatigue life.