Key Flat Shank Tapped Punches - DLC Coating

Key flat shank tapped punches with DLC coating are used as fixed location punches in injection press and die tooling where repeatable part geometry depends on stable punch guidance. The key flat shank tap mounting provides positive anti-rotation positioning, helping maintain punch attitude through repeated cycles.

• Automotive connector and insert tooling: Suitable for forming and punching features in close-tolerance inserts because the DLC (XCD) surface treatment improves wear resistance during high-cycle press operations.
• Electronics housings and snap-feature dies: Works well in progressive or multi-station die sets where the punch must return to the same location to preserve critical critical dimensions.
• General precision progressive tooling: The DLC variant is suited when longer punch life is needed under abrasive contact, while the keyed flat shank helps prevent rotational drift in the cavity/core interface.

Select this variant when your tooling requires controlled engagement and positioning stability in close-tolerance work.

This punch uses an SKH40-equivalent powdered high-speed steel substrate. Powder metallurgy processing refines carbides and supports consistent wear behavior under cyclic cutting and punching loads.

• DLC (XCD) coating: Deposited to enhance surface hardness and reduce adhesive/abrasive wear during repeated punch cycles.
• DLC + WPC (optional): Adds an additional wear-performance layer compared with DLC alone, targeting improved durability in more aggressive contact conditions.
• Heat treatment state: Provided as a hardened high-speed steel base suitable for precision punching applications; final performance depends on the supplier’s hardening and temper process for this steel grade.

In practice, increasing hardness improves wear resistance but can reduce toughness if over-hardened; the HSS family balance is chosen to maintain reasonable toughness for punch-through and forming operations.

To select the correct keyed flat shank tapped punch, start by matching the shank diameter (D) to the guide bore and alignment features in your die set. The specified range is D = 6 ~ 25 mm, which must fit the corresponding holder/locating interface without clearance that could allow rotational or lateral movement.

• Choose the tip shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) to match the cavity/core feature you need to form.
• Select the tip dimension set: P = 1.5 ~ 18 mm and W = 1.5 ~ 6 mm (with corresponding dimensional options). For corner geometry, use R = 0.15 mm.
• Confirm overall geometry: available L ranges include 50–80, 50–100, 60–100, 40–80, 40–100 mm, and the full-length alteration LC = 27–99.9 mm (variant-dependent). Tip alteration PC = 1 ~ 9 mm and WC = 1 ~ 3 mm should align to your sharpening allowance and working length.

Note the assembly fit guidance stated for this series: the shank diameter is controlled at +0.005/0, so design the mounting hole/guide for a tight, repeatable engagement to preserve punch alignment.