4140 Steel Fixture Plates: Our 4140 steel fixture plates are our premier fixture plate line and are best suited for demanding, daily use. Ideal for high-load, high-cycle applications where maximum rigidity and durability matter most. Steel plates are roughly 2.5× heavier than an aluminum plate of the same size, which can be a consideration for handling and installation. 7075 & 6061 Aluminum Fixture Plates: Aluminum fixture plates offer meaningful advantages in weight, handling, and ease of installation, while still delivering the precision and quality our plates are known for. 7075 Aluminum (Anodized) Anodized 7075 aluminum is a compelling alternative when weight is a priority. An excellent balance of strength, weight, and performance. Approximately 1.5× harder than 6061 and nearly twice as strong. Form-tapped threads for increased thread strength and longevity. Anodized coating improves wear resistance, helps reduce scratching, and provides galvanic corrosion resistance. Significantly lighter than steel, reducing shipping costs and simplifying installation and changeovers. 6061 Aluminum Our bare 6061 aluminum plates are our value-focused option. While more economical, they are manufactured to the same high standards and tight tolerances. A great way to expand your workholding envelope, implement the SMW Mod Vise system, and reduce CNC setup time. Form-tapped threads for improved strength. If installing a bare aluminum on a non-aluminum surface such as a bare machine table these plates must be used with a galvanic corrosion inhibitor (e.g. dielectric spark plug grease) and be removed frequently to inspect for condition and/or re-apply the corrosion inhibitor. Dielectric grease is available here.
