HW Coated Double-Stepped Tapped Punches

HW-coated double-stepped tapped punches are used in bolt-fixed injection and metal-forming mold/tooling systems where the punch must be positioned accurately and serviced quickly. The HW coating supports consistent cutting performance during repeated cycling and regrinding, which is valuable for high-utilization tooling.

• Automotive connector and bracket punching: The double-step geometry helps maintain stable feed at narrow pitches, while the tapped shank enables secure bolt fastening for reliable alignment on thicker plates.
• High-tensile material features: Large/extra-large tap diameter options are engineered to reduce bolt breakage risk when punching demanding sections, improving repeatability after maintenance.
• Precision housings with frequent edge regrind: Bolt-fixed design allows straightforward punch replacement and height adjustment after edge regrinding, supporting fast turnaround during mold refurbishment.

The product is specified as an HW-coated tapped punch type. The key functional material attribute provided is the HW coating, selected to improve surface wear resistance at the cutting edge during punching and after repeated regrinding.

• Wear resistance vs. toughness trade-off: Hard, wear-oriented coatings help protect the cutting region under abrasive load, while the underlying punch body must maintain adequate toughness to avoid chipping at step transitions.
• Heat treatment: The provided specifications do not list the steel grade or a defined heat-treatment state (e.g., quenched & tempered, nitriding). For exact properties such as HRC and grade equivalence, confirm the requested material documentation for your chosen configuration.

When comparing variants, the primary differentiation in the data is the tap type (large vs. extra-large diameter), which influences mechanical load distribution at the bolted interface rather than the coating identity.

Select the punch dimensions by matching the shank diameter D, the tip geometry, and the total length alterations to the mold cavity/core requirements and allowable cutting-edge reach.

• Shank diameter fit: Choose D = 5 ~ 25 mm with tolerance +0.005/0, m5 to align with guide/bushing bores and maintain repeatable punch positioning.
• Tip dimensions: For cutting-face size, select P = 0.8 ~ 9 mm, B (tip length) = 2 ~ 45 / 2 ~ 60 / 2 ~ 25 / 2 ~ 30 mm, and corner R = 0.15 mm (where applicable). Use W = 0.8 ~ 3 mm and V = 0.83 ~ 9.01 mm to match the selected tip shape variant.
• Length/step engagement: Verify L = 40 ~ 80 or 40 ~ 100 mm and choose LC within the listed ranges to control cutting-edge height after regrind and ensure proper engagement.

Configured vs. fixed: Tip shape and tap standard type are variable; select the configuration that matches the target cavity geometry and bolt interface. Tolerance on D is fixed to the stated fit class for the chosen size.