SPLG Support Pillars With a Dowel Hole

Where they’re used: These support pillars are built for precision dowel-location in leader-ejector spacing areas of injection mold tooling and adjacent assembly fixtures. The integrated dowel hole enables stable, repeatable alignment when sections of a mold or a jig must return to the same position every cycle.

• Automotive connector and housing molds: Use the dowel hole to maintain alignment between mold halves or insert stations, helping reduce mismatch during clamping and part ejection. The SPLG configuration supports consistent positioning across selectable lengths, which is helpful when the leader/ejector space must vary by layout.
• Medical device housings and secondary assembly jigs: For fixtures that require accurate repeat location of plates, sub-assemblies, or gauging interfaces, the dowel-hole geometry improves location accuracy in jig assemblies while keeping support stiffness.
• Press fixtures and automated assembly tooling: Select the appropriate shaft diameter (D) and length (L/LC) to match machine interfaces and tooling stack-up, ensuring stable support without shifting.

The provided dataset does not specify a steel grade, hardness (HRC), or heat-treatment state for this SPLG support pillar variant. For accurate material selection in injection tooling, confirm the supplier’s steel grade and processing route before final engineering sign-off.

In general, support pillars intended for repeatable dowel positioning are manufactured from tool steels and are typically delivered in a heat-treated condition to balance wear resistance (resisting abrasion at sliding or contact interfaces) with toughness (resisting chipping or deformation under repeated loading). Depending on the application, materials may be provided as pre-hardened or quenched & tempered; some solutions use surface treatments such as nitriding to improve surface wear without sacrificing core toughness.

• Key trade-off: Higher surface hardness improves wear resistance but can reduce toughness if the core is not properly tempered.
• Comparison note: If multiple material options are available, choose based on loading severity and any requirements for dimensional stability after heat treatment.

Correct dimensioning ensures the dowel-location scheme returns to the same alignment point and that the pillar supports the tooling stack without interference. Use D (shaft diameter) to match the leader/ejector-space interface bore and clearance requirements: available diameters are 20, 25, 30, 35, 40, 50 mm.

• Select length L: Choose from the provided L ranges that fit your mold base or fixture stack-up, depending on the variant—40–100, 50–100, 50–120, 50–150, or 70–200 mm.
• Account for LC alteration: Where the product specifies LC (L dimension alteration), pick the LC range aligned with your design’s offset needs—41–99, 40–99, 51–119, 51–149, or 71–199 mm.
• Tolerance/fit: Because a dowel hole is included, maintain proper dowel fit (location accuracy) with the mating dowel’s target clearance/interference and respect standard machining tolerances for the selected shaft diameter.

If your stack-up is fixed, select a matching L (and corresponding LC if applicable). For adjustable designs, pick a length variant that covers your maximum build height while keeping safe clearance to adjacent components.