RW Coating Tapped Punches

RW-coated tapped punches are used in industrial die manufacturing where a fixed, bolt-held punch is required for consistent punching performance. In progressive or transfer press tooling, the punch body is bolted to a die holder so the tapping tip engages repeatably and maintains positional stability under cycle load.

They are well-suited for automotive and appliance stamping applications that punch and tap thick steel plates. The availability of tapped large/extra-large diameter types helps reduce the risk of bolt breakage when holding higher-load punch geometries.

For job shops managing frequent die maintenance, the RW coating variant supports easier service after edge regrinding. When the cutting/tapping edge is worn, replacing the punch rather than rebuilding the die reduces downtime, while the tip shape options (A/D/E/G/R) allow adaptation to different engagement and tapping requirements.

The provided specifications describe RW-coated tapped punches by geometry and tolerance, but do not specify the steel grade or heat-treatment recipe. As a result, the exact hardness (HRC), wear-resistance mechanism, and tempering/nitriding conditions cannot be stated from the input data.

What can be confirmed is that the RW coating is intended to improve wear performance during repeated die operation and to support practical regrinding/edge service cycles. In die tooling, this generally complements a high-wear cutting environment by reducing surface degradation at the punch tip and improving repeatability after maintenance.

• Heat treatment: Not specified in the provided data.
• Hardness (HRC): Not specified in the provided data.
• Trade-offs: Tip geometry and holding size (large/extra-large types) are specified to mitigate mechanical risks such as bolt breakage under load.

Select RW-coated tapped punch dimensions by matching the required tap/interacting tip size to the die cavity/core and then verifying shank fit for bolt holding and alignment.

Start with the required shank diameter: the D range is 5–25 mm, with a tolerance of +0.005/0 (m5 class). Ensure the die holder/bush bore and bolt seat provide the intended clearance/fit to maintain alignment during punching.

Next, choose the tip geometry parameters according to the press/tapping requirement:

• P (tip dimension): 1.2–18 mm
• B (tip length): options L, S, X
• L dimension overall: 40–70 mm
• LC full-length alteration: 27–42 mm
• PC tip alteration: 0.8–9 mm
• R corner radius: 0.15 mm (as specified)
• W / WC tip width and alteration: 1.2–6 mm and 0.8–3 mm

Use fixed versus configurable options as follows: shank diameter and overall dimensions vary by size selection (5–25 mm for D; 40–70 mm for L), while tip shape is selected from A/D/E/G/R.