Inch Tapered Interlocks Shoulder Plates with Black Oxide Finish

These inch tapered interlocks shoulder plates are used at the mold interface to create repeatable, positive alignment when ejector-space components incorporate round tapered interlocks. The tapered geometry helps locate moving and fixed halves during clamp-up, reducing misalignment-related issues such as flash and uneven cavity wear.

Automotive and industrial part connector tooling: Install the plate sets on the mold shoulder where FHCS fasteners secure them to the interface. The hardened, ground finish supports interchangeability when service crews swap or rework mold halves.

Consumer electronics housings: Use them in multi-cavity molds that experience frequent maintenance cycles. The black oxide finish is suited for routine shop handling and can improve corrosion resistance on exposed surfaces.

Medical device housing molds: Incorporate them to maintain consistent alignment across production runs. Selecting a plate thickness (T) and diameters that match your tapered interlock features helps ensure stable fit under repeated thermal cycling.

Constructed from 4140 steel, this component provides a balanced combination of strength and toughness for mold interface alignment hardware. The steel is hardened and precision ground to support interchangeability and stable seating against mating tapered interlocks.

• Wear resistance vs. toughness: Hardening improves resistance to fretting and surface indentation at the alignment shoulder; however, as hardness increases, impact toughness can decrease compared to softer conditions.
• Surface protection: The black oxide finish supports corrosion resistance during handling and mold service, particularly on ground edges and mounting faces.

Heat treatment is specified as hardened; for exact hardness values (HRC) and the specific tempering range, confirm the batch certificate with Axiom Molds based on your application loads.

Select the plate dimensions to match your mold’s tapered interlock hardware so alignment is positive without forcing fit. Use the provided ranges for T (thickness), D (diameter), and O.D. (outer diameter) to mirror the mating features on the mold interface.

• Thickness (T): choose 3/16 in or 1/4 in based on the shoulder spacing and stack height requirements at the ejector-space interface.
• Diameter (D): match to 11/16 in, 1 in, 1-3/16 in, or 1-11/16 in so the shoulder plate sits correctly around the tapered interlock region.
• Outer diameter (O.D.): select 1/2 in, 3/4 in, 1 in, or 1-1/2 in to clear adjacent features and ensure full bearing contact.

Because the product is precision ground and includes FHCS fasteners, keep an eye on practical assembly fit—avoid undersizing that could reduce contact, and allow for any local machining variation on the mating mold half. T, D, and O.D. are provided as selectable fixed options per order configuration.