DIN Standard SKD61 Steel One-Step Center Pins Flat-Sided, Nitrided

One-step center pins with a nitrided SKD61 surface are used to provide stable locating and repeatable concentric alignment in injection mold and press tooling assemblies. Their flat-sided one-step head helps resist rotation during installation and ongoing clamp cycles, which is important when dies must remain centered over repeated production runs.

• Automotive connector and bracket molds: Use these pins to maintain alignment between upper and lower components during high-cycle molding. The nitrided wear-resistant layer supports consistent locating even under frequent insertion/withdrawal loads.
• Industrial appliance housings: Flat-sided positioning supports reliable repeatability during setup changes and quick die maintenance. The one-step geometry simplifies assembly while promoting stable contact with corresponding sleeve holes.
• Medical and precision housings: For parts requiring tight registration, the variant is designed to match H7 sleeve-hole fit so locating remains precise as the tooling wears.

This product uses DIN Standard SKD61 steel in a nitrided condition. SKD61 is commonly referenced as equivalent to AISI H13 for tool steels used in hot-work and molding environments.

The nitrided surface enhances surface hardness and wear resistance while preserving the toughness of the steel core. For center pin applications, this improves resistance to fretting and surface degradation where pins repeatedly seat into sleeve holes.

• Heat treatment state: nitrided (nitrided surface over SKD61 substrate).
• Hardness / performance trade-off: nitriding primarily boosts near-surface wear resistance; the core retains toughness to avoid brittleness from heavy surface hardening.
• Material comparison: compared with through-hardened steels, nitriding focuses wear resistance at the contact surface for improved locating stability with less risk of bulk brittleness.

Note: Specific HRC values are not provided in the supplied data.

Selection starts by matching the pin’s D/P (shaft diameter) range of 1.5 ~ 15 mm to the corresponding sleeve-hole size and required fit. This variant is intended for accurate fit to H7 sleeve holes, so engineers should confirm the sleeve-hole diameter is H7 for the target location.

• Choose nominal diameter: select No. (nominal diameter) 2 ~ 16 mm consistent with the required locating interface.
• Confirm shaft length: F (shaft diameter length) = 50 mm is fixed in this product line, so only applications accepting this effective locating length should be considered.
• Match overall length: select the correct L (L dimension) option based on die thickness/stack-up, available in 70 ~ 400, 70 ~ 500, 70 ~ 600, 70 ~ 700 mm ranges depending on configuration.
• Tolerance/fit: tip tolerance options are listed as ±0.02, ±0.01 (and a near-±0.02 symbol in the data); align the selected A/V (tip tolerance) with assembly and wear expectations.
• Configurable geometry: step shape (A, B, C, D, E) and tip shape (No processing, B, C, G, R, T) change the seating profile; verify compatibility with the mating sleeve and keying approach.