O1 Tool Steel Locking Blocks with Angular Pin Holes

Locking blocks with angular pin holes are used in injection mold tooling to achieve repeatable inlay positioning along the parting line. The angular hole enables controlled registration of an inlay insert, reducing the risk of shift during assembly and shot-to-shot cycling.

• Automotive connector and insert molds: Inlay-type locating features help maintain alignment of thin ribs, insulation features, or localized texture inserts that must stay concentric with housings under high clamping repeatability.
• Electronics housings and multi-material overmold tooling: The parting-line mechanical locking supports stable placement of auxiliary cavities or inserts, especially where location accuracy affects ejector-side fit and cosmetic surface continuity.
• General undercut / step features: Using the ALBPS inlay type with PL (parting-line) mounting provides secure fixing from the parting line, while the specified angular alignment geometry (angle ranges) is suited for controlled inlay engagement.

This O1 tool steel variant is appropriate where robust wear performance supports frequent assembly cycles and reliable mechanical locking.

This product is made from O1 tool steel (commonly supplied in an injection-mold component-ready condition). O1 is valued for its good balance of machinability and wear resistance in tooling parts that experience repeated contact and sliding/locating action at the parting line.

• Hardness & wear vs. toughness: Typical O1 applications target a medium-to-high hardness level (often in the ~HRC range used for general-purpose tool steels). Higher hardness improves wear resistance of locating surfaces, but increases sensitivity to impact and edge chipping if shock loads occur.
• Heat treatment state: O1 is generally quenched and tempered to set hardness and toughness for dimensional stability during service.

Compared with higher-alloy wear steels, O1 can offer a more practical toughness-to-wear balance for locking/inlay components that must machine cleanly while still maintaining reliable contact performance.

Select the locking block by matching its inlay engagement geometry and overall block envelope to the mold’s cavity/core pocket requirements. Use the available ranges for Block Height T (30 ～ 50, 35 ～ 60, 40 ～ 60 mm) and Block width A/W (48 ～ 68, 48 ～ 78, 58 ～ 78 mm) to fit the PL mounting space and ensure sufficient material around the angular hole.

• Choose H/E (10 ～ 40 or 10 ～ 50 mm) to match the required inlay part thickness/engagement depth.
• Select the angular hole diameter D (10, 13, 16, 20 mm) to match the locating pin/inlay feature used for registration.
• Confirm the angular geometry: Angle A is 10 ～ 20° and Angle G is 12 ～ 25° for the mating inlay alignment.

Because dimensions are provided as grouped ranges, treat T, A/W, and H/E as configurable options that must be validated against your drawings for fit and assembly clearance at the parting line.