O1 Tool Steel Positioning Locking Blocks - Beveled Edge Bottom (KN)

These O1 tool steel positioning locking blocks are used in injection mold tooling wherever precise, repeatable locating is needed for undercut/plate style assemblies. The KN beveled edge bottom helps create consistent contact during clamp-up, improving positional stability for parts that must remain aligned over many cycles.

• Automotive connector and housing molds: commonly used for plate and insert positioning so mating components maintain correct register under vibration and thermal expansion.
• Consumer and appliance enclosure tooling: supports stable PL installation with adjustable locking angle ranges to match different locating features and reduce misalignment risk during setup.
• Industrial tooling for long-run production: O1 tool steel provides wear-resistant performance for durable locating surfaces, reducing wear-driven drift in high cycle environments.

The angle configurable feature (K and G ranges) makes this variant suited for matching diverse locating geometries, while the fixed KN beveled bottom provides reliable edge contact without requiring additional processing.

This block is made from O1 tool steel, a high-carbon oil-hardening tool steel typically selected for tooling parts that need good wear resistance and stable machining characteristics. In service, O1 balances hardness for long life at the contact area with toughness to better tolerate minor shock loads during mold actuation.

• Wear vs. toughness trade-off: higher achievable hardness improves wear resistance at the locking interface but can reduce impact toughness if over-hardened.
• Heat treatment: O1 is commonly quenched and tempered after machining to reach target hardness and dimensional stability for the locating surfaces.
• Surface/edge performance: the KN beveled edge bottom area benefits from the hardened locating surface condition to resist fretting and micro-wear.

Compared with more alloyed wear-first steels, O1 often offers a favorable balance of machinability and performance for positioning components, especially when heat treatment is tuned for hardness and toughness.

Select the block dimensions by matching the locating requirements of your PL installation and the mating components in the undercuts/plates stack-up. The series specifies variable ranges for block height T (30–45 mm, including 45 mm), block length L (25 or 40 mm), and block width A/W (38–98 mm, including 68–108 mm depending on configuration).

• Step 1 (Height T): choose T to align the locating elevation with the target plate/core register so the beveled bottom sits correctly under clamp load.
• Step 2 (Plan dimensions L and A/W): ensure L and A/W fit within your plate space and allow clearance for assembly and any adjacent hardware.
• Step 3 (Angle matching): select the locking angle K (5° or 5–10°) and angle G (5–20° or 5–22°) that best matches your locating geometry.
• Tolerance/fit: while exact tolerances are not provided, plan for standard mold assembly fit by verifying contact area and ensuring the KN beveled edge achieves consistent contact.

The beveled bottom is fixed as KN with no processing required, so dimensioning should focus on T, L, A/W, and the chosen angle set.