Jector Punches RP Coating (Al-Cr Based + Alpha Treatment)

These jector punches are used in injection-mold tooling where ejector/jetting features must survive repeated punching, forming, or fine cutting cycles. The Al-Cr based RP coating improves surface hardness and heat resistance, helping maintain stable cutting performance at higher tool temperatures.

They are commonly specified for automotive connector and bracket molds that run high volume and experience abrasive wear from glass-filled compounds. The Alpha treatment is particularly useful here because it enhances coating adhesion, reducing the risk of coating delamination and extending punch life.

For appliance and electronics housings, where maintaining dimensional consistency and reducing unplanned maintenance are critical, this punch variant helps sustain ejection reliability by limiting wear growth over time.

• Round/rectangle/oblong and specialized tip corner geometries support different punch interfaces and part-releasing layouts
• Material options (SKH40/SKH51/SKD11 equivalents) enable tailoring for wear vs. toughness needs

Jector punches are offered with multiple high-performance steel options: SKH40 equivalent (powdered high-speed steel) for balanced wear resistance and cutting stability; SKH51 equivalent (M2) for high hot hardness; and SKD11 equivalent (D2) for strong abrasion resistance.

The RP coating system consists of an Al-Cr based coating plus Alpha treatment. In practice, this pairing is used to improve coating hardness and heat resistance while strengthening film adhesion to the substrate—helping resist wear mechanisms that shorten punch life.

• Hardness/rockwell levels are not specified in the provided data; selection should follow your toolmaker’s standard heat treatment for the chosen equivalent steel.
• General trade-off: HSS options (SKH40/SKH51) typically prioritize hot wear resistance, while D2-class (SKD11) emphasizes abrasion resistance.
• Tip corner radius is small (R = 0.15 mm), so coating integrity and adhesion are important to prevent edge degradation.

Select the punch by matching the shank diameter (D), tip dimensions (P), and overall length (L/LC) to the receiving mold cavity/core features and required penetration depth.

• D range: 4 ~ 25 mm with shank diameter tolerance of +0.005/0 (m5). Use the mold hole reaming/guide sizing so the guided fit does not create excessive insertion force or looseness.
• Tip dimension range (P): 1 ~ 18 mm, depending on the chosen tip shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle). Confirm the part interface requires the specific geometry and edge radius (R = 0.15 mm).
• Length selection: L = 40 ~ 80 mm, and full-length alteration options LC = 33 ~ 74 mm (also stated for LCT and LMT as 33 ~ 74 mm). Use these values to align the effective working length and head thickness behavior in your stack-up.

Tip dimension alteration (PC = 0.9 ~ 9 mm, depending on variant) should be treated as a controlled dimension change; verify it against the required punch-to-cavity clearance and relief features.