Rack Back Panel Hole Patterns: Row Holes and Corner Notches

1. Bottom line

Back panels need pattern-specific punching before forming. After decoil and leveling, servo feed drives the strip through row-hole and corner-notch dies; then the panel is roll-formed and hydraulically cut with folded edges. This is a separate configuration from flat deck panel and box panel — same shelf-panel product family, different parameters.

2. Typical punch scope

• Row-hole die — lateral hole rows along the panel (ventilation / attachment)
• Corner-notch die — corner relief for rack assembly
• Reference documents cite about four punch mold sets plus one cut-blade set — confirm tooling scope per order

Industry back-panel lines similarly describe hydraulic punching of lateral holes with left/right corner-cut molds before forming — useful as process context, not as ZTRFM locked ratings.

3. Multi-width host

Do not copy deck-panel ~0.8 mm / ~11 kW / ~30-stand figures into a back-panel inquiry.

4. Vs deck and box punch

• Deck — continuous shelf-hole / notch patterns for horizontal decks; wider host (~285–685 mm class)
• Box — side notches + holes ahead of dual A/B hoist hosts
• Back — dedicated row-hole + corner-notch tooling and 100/200/400 width stops

5. Inquiry checklist

• Row-hole pitch / diameter drawing and corner-notch geometry
• Which finished widths (100 / 200 / 400 or custom)
• Whether punch molds and cut blades change with each width
• Thickness band and material grade

6. Buyer FAQ

Same punch pattern as deck panel?

No. Deck panels use continuous shelf-hole/notch patterns sized for horizontal decks. Back panels use dedicated row-hole + corner-notch tooling and different width stops.

What changes when width changes?

Punch molds and cut blades are adjusted or swapped with width. Side-plate electric travel is cited about 150–300 mm in source docs — confirm on drawings.

Can I use deck ~0.8 mm / ~11 kW here?

No. Back-panel reference thickness is about 0.4–0.6 mm with forming ~5.5 kW and total ~27 kW class — keep columns separate.

Is punching after forming an option?

Reference process punches on the flat strip before roll forming. Post-form punch would need a separate written process proposal.