RX Coated Shoulder Punches

RX-coated shoulder punches are used in injection-mold tooling wherever a press-in or die-set station must produce clean, burr-controlled holes for part assembly and downstream operations. The RX coating variant is particularly suited for toolmaking workflows that cycle the punch repeatedly, because the coating reduces friction at the cutting interface and helps resist wear, supporting stable punching accuracy.

• Automotive and appliance assembly die sets: Use the shoulder feature to maintain consistent positioning in the guide region, supporting tight, repeatable hole formation in commonly used steel and aluminum housings and brackets.
• Electronics enclosure and connector housings: Select the correct tip geometry (round, rectangle, oblong, double-flatted round, or radius rectangle) to match the required opening profile while maintaining smooth cut surfaces.
• Medical device subassembly fixtures: The durable surface protection is intended to reduce dimensional drift over long production runs, improving long-term hole quality in precision assemblies.

This series is offered in multiple high-performance steel grades, each selected for different wear/edge-retention requirements.

• SKH40 Equivalent (powdered high-speed steel): Powder metallurgy improves uniformity and can support good wear resistance for general punching applications.
• SKH51 Equivalent (M2): Corresponds to AISI M2-type high-speed steel, typically used when a balance of hardness and wear resistance is needed for repetitive cutting.
• SKD11 Equivalent (D2): Tool steel known for high wear resistance; it may trade some toughness compared with high-speed steels depending on heat treatment.

Heat treatment is not specified in the provided data, but these grades are commonly supplied in a hardened condition for punching. The RX coating complements the steel by lowering friction and helping manage wear at the tip corner (R specified in dimensions), which is where edge damage typically initiates.

Select the shoulder punch dimensions by matching the punch tip profile to the die opening requirements and then verifying shank fit for alignment.

• Shank diameter (D): Choose from 3 ~ 25 mm and note the D tolerance of +0.005/0, m5. This tolerance must match the guide/bushing bore design to achieve the intended fit and minimize lateral play.
• Tip geometry: Pick the required tip shape—Round, Rectangle, Oblong, Double Flatted Round, or Radius Rectangle—then select tip size using P = 1 ~ 18 mm, with tip corner R = 0.15 and tip width W = 1 ~ 6 mm (plus alteration ranges PC = 1 ~ 9, WC = 1 ~ 3 where applicable).
• Lengths: Use L = 40 ~ 100 up to multiple listed L ranges and confirm full-length alteration parameters LC = 27 ~ 47 and tolerance-change parameters LCT / LMT = 27 ~ 47 to ensure stack-up clearance in the die set.

Configure the variant by tip length (B: L, S, X) and overall length alteration so the shoulder seats correctly without interfering with die components.