Fixing Keys for Punches with Key Grooves - Rectangular Through Hole

This rectangular through-hole fixing key is used in precision punch tooling where keyed punches must stay stable during machining and repeated press cycles.

• Automotive and industrial connector punch sets: use the through-hole clamping design to reduce micro-movement in keyed punch systems, helping maintain consistent pin alignment and improving dimensional repeatability when cycling high quantities.
• General mechanical parts forming: pair it with punch holders using M4 / M5 / M6 center-hole screw configurations to enable secure tightening and consistent punch retention while minimizing wear from vibration.
• Wear-sensitive production runs: the rectangular fixing format and centered through hole support controlled seating, which helps prevent misalignment-driven edge damage and premature failures.

With SKS3 or S45C options and defined head thicknesses (T = 3 mm or 4.5 mm), this variant is well-suited for setups that prioritize clamp stability and repeatable punch positioning.

These fixing keys are manufactured in either SKS3 or S45C steel, selected to balance strength and wear behavior under clamping load.

• SKS3: typically used when higher hardness and better wear resistance are required for tooling components that experience rubbing or frequent tightening cycles.
• S45C: a commonly used carbon steel option that offers reliable strength and machinability; it is a practical choice when toughness and consistent clamping performance are the priority.

For both material choices, the keys are typically produced in a heat-treated condition suitable for tooling service; final hardness is achieved via the supplier’s standard quench-and-temper or appropriate hardening practice depending on the selected grade. Expect a trade-off: higher hardness improves resistance to surface wear, while excessive hardening can reduce toughness under shock loads—so the correct grade and heat-treatment state should be matched to the punch force and vibration profile.

Select the fixing key dimensions to match your punch holder’s screw-center configuration and the required clamp plate thickness.

• Choose the screw size specification: use the variant specified for M4, M5, or M6 center holes (e.g., “Center hole for M4 screws / M5 / M6” as applicable).
• Match head/plate thickness T: ensure the head thickness/plate thickness aligns with your tooling stack-up using T = 3 mm or 4.5 mm.

During assembly, the through-hole must align concentrically with the punch’s screw axis to prevent eccentric loading that can encourage punch drift. Use the specified center-hole option to maintain correct fit between screw and key.

Because the provided data specifies discrete thickness and screw-size variants, treat these dimensions as configurable via the selected spec; keep other layout features (rectangular form and through-hole centering) consistent with your keyed punch interface.