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| About Apex Fasteners: | |
| Candidates for Cold Forming Any one of the following criteria make a part a strong candidate for cold forming: - Large head to shank ratio - Part is longer than 1-1/2 times its largest diameter - Part has multiple diameters - High production quantities needed - Raw material is a large portion of part's total cost - Part has fine surface finish requirements - Strength, hardness and ductility must meet certain requirements - Part requires a geometrical shape, a drive system or an extrusion Tolerances While part geometry affects tolerances, cold forming generally allows your tight tolerance requirements to be met. When combined with secondary grinding operations, tolerances as tight as .0127mm (.0005") can be achieved. The diameter (top) and length (bottom) tolerances shown here can be achieved without secondary machining. Undercuts If the application requires a sharp fillet radii, corner or flush surface, an undercut can be achieved in the cold forming process, possibly eliminating a secondary operation. Radii Generous radii at the corners allow the natural flow of material to strengthen the part and reduce the need for secondary machining. If necessary, tight or zero radius corners are possible through secondary machining. Materials Apex Fasteners can cold form many unusual alloy, stainless steel and machining-grade materials, to allow easy conversion from screw machining and other manufacturing methods. Materials include: - Low carbon steel - Bronze, including silicon and commercial - Medium carbon steel - Aluminum - Alloy steel - Stainless steel - Copper, including high-strength alloys - High technology alloys - Brass |
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