Large Tap Diameter Tapped Punches

These bolt-fixed tapped punches are used in precision punching operations where repeated regrinding and height adjustment are required. They are especially suitable for thick plate punching and high-tensile material feeds, helping maintain stable punch engagement and reducing the risk of bolt breakage during load peaks.

In automotive and chassis fabrication, shops frequently punch structural components from hardened or high-strength steels. The tapped, large-diameter form and bolt-fixed construction support quick tool replacement when edge regrinding changes punch height, minimizing downtime.

In electrical enclosure and bracket production, repeated hole patterns demand consistent hole quality across production lots. Select the RX or HX surface options to improve wear performance on abrasive cutting edges, supporting longer service intervals.

• Tip shapes (A, D, E, G, R) allow matching to your hole geometry requirements.
• RX coating (Al-Cr + nitriding) or HX coat can be chosen based on wear regime and press conditions.

For this series, wear performance is primarily addressed through selectable surface treatments rather than a single fixed steel grade in the provided data. Options include RX coating (Al-Cr + nitriding treatment) and HX coating, both intended to enhance edge wear resistance in abrasive punching conditions.

In typical press tooling, nitriding-based treatments are used to increase surface hardness and fatigue resistance, while the underlying base material maintains toughness to absorb mechanical shocks. The key trade-off is that highly wear-oriented coatings can be more sensitive to edge chipping if alignment or feed is off, so stable bolted retention and correct dimensions are essential.

• RX (Al-Cr + nitriding): combines a hard diffusion layer benefit with improved wear behavior.
• HX coat: selected when you need an alternative wear surface strategy for your specific material and cycle rate.

For final performance expectations (hardness HRC, exact substrate strength), confirm the supplier’s material certificate for the selected coating option in your configuration.

Select the tapped punch dimensions by matching the shank diameter (D), tip dimensions, and full length change (LC) to your press tooling setup and cavity/core or guide geometry (as applicable).

• Shank diameter D: choose within 5 ~ 25 mm. Use the provided tolerance class: +0.005/0 with m5 reference as applicable for fit in the holder.
• Tip dimension (P): match 1.2 ~ 18 mm to the punch opening/hole geometry requirement.
• Tip length B: select L, S, or X based on how much penetration depth your process needs.

For height compensation after edge regrinding, use LC (Full length change) and PC (Tip dimension change) ranges to ensure the punch maintains acceptable edge-to-work positioning over the regrind cycle. Confirm LC and PC fit your expected regrind amount (e.g., 27~79.9, 27~99.9, up to 42~99.9, depending on the specification), and account for your press clearances.

• Tip corner R: fixed at 0.15 mm in the provided parameters.
• Configurable parameters: tip shape (A/D/E/G/R) and surface treatment (HX, RX).
• Fixed/defined geometry: R = 0.15 mm; choose the corresponding W/WC ranges when you select the tip dimension set.