Blade Application Guides / Application Guide / Electronic metal converting
Ultra-Thin Stainless-Steel Foil Precision Coil Slitting Blades
Nippon Steel Chemical & Material supplies ultrathin stainless-steel foil for precision and electronic uses and emphasizes thickness accuracy and press formability. Ulbrich states that its metal foils are slit at finished gauge and temper to customer width. This guide addresses an unassembled, named stainless grade supplied as a wide foil coil; it does not assume that 301, 304 and 316L share a knife recipe. DIENES describes upper/lower shear cutting for metal foil, making a rotary pair a trial candidate. Thin stainless can curl, develop a raised burr or imprint a neighboring reel even when width is in tolerance. The buyer must specify grade, temper, surface finish and downstream part before blade geometry is selected.
Updated
Where This Cutting Application Appears
Set the electronic-strip lane plan
Take required width and edge allowance from the spring, circuit reinforcement or other part drawing. Identify hard rolled versus annealed supply, surface finish and rolling direction. A flexible board stiffener and a precision spring may use different acceptance even when both begin as foil.
Trial the rotary pair on a representative coil
Record upper/lower knife engagement, web support and trim extraction. Inspect both sides of every new slit because the upper knife and counterknife may leave different lip geometry. A small hard-metal burr can damage tooling or catch a neighboring wound turn.
Watch narrow-reel behavior
Measure lane width across start, middle and tail. Check camber, curl, edge wave and telescoping after rewind. Unwind a sample to reveal impressions or scratches hidden inside the coil; do not treat a neat outer roll face as proof of flat material.
Release material for the next press or laminate
Label stainless grade, temper, rolling direction and slit side on each reel. The downstream builder should check feed stability and forming or etching suitability with its actual tooling. Dimensional slitting inspection cannot certify finished spring performance or corrosion behavior.
Define the Required Cut Result
- Produce documented widths from identified foil stock.
- Keep burr and metal fragments within buyer criteria.
- Avoid edge imprint and curl in wound lanes.
- Preserve grade and temper identity.
Problems to Diagnose Before Changing the Knife
One slit side has a sharp raised lip
- Check knife pair engagement and wear.
- Compare upper and lower cut faces.
Narrow reels develop edge wave
- Review tension, slit layout and parent-coil flatness.
- Inspect after relaxation.
Tooling finds fine stainless fragments
- Trace trim path and worn edges.
- Check guides and wound-lane surfaces.
Knife Forms That May Be Considered
| Possible knife form | When it may be considered | What must be confirmed |
|---|---|---|
| Matched rotary shear knives | For a qualified stainless grade and gauge in continuous coil conversion. | Confirm width, both-edge burr and wound-roll behavior. |
Information to Send for Technical Review
You do not need to know the exact blade name. Send the available workpiece, machine, current-knife and cut-result information so the application can be reviewed against a drawing or sample.
- Exact stainless alloy, temper and thickness
- Surface finish and allowed contact side
- Parent width and target lane map
- Rolling direction and source lot
- Shear engagement and rewind configuration
- Burr, scratch and width criteria
- Trim and fragment capture method
- Receiving press or laminate test plan
Questions About This Cutting Application
Is ultra-thin foil one fixed stainless grade?
No. Supply grade and temper before choosing a knife setup.
Why inspect both sides of each slit?
The knife pair can leave different burrs on each child edge.
Can a wound coil hide a defect?
Yes. Inner wraps may contain scratches or edge imprint.
Does a good slit guarantee a spring part?
No. The finished pressed part needs separate qualification.
What should a quote include?
Provide mill certificate, reel sample, lane drawing and edge limits.
Public references and scope
These public sources provide material, cutting-method or safety context for this guide. Supplier pages describe their own materials or equipment; they do not establish a MEIRENTE blade specification or performance claim. Confirm the actual grade, machine setup and required cut with a drawing or sample.
Related product and service information
- Ultra-Thin Stainless-Steel Foil Strip Edge-Trimming Blades - ultra-thin stainless-steel foil · strip edge trimming
- Rolled-Annealed Copper Foil Precision Coil Slitting Blades - rolled-annealed copper foil · precision coil slitting
- Nickel-Clad Copper Strip Precision Coil Slitting Blades - nickel-clad copper strip · precision coil slitting
Request a Custom Cutting-Knife Review
Send the workpiece details, machine or holder information, current knife photos or sample, required quantity and examples of the present cut problem. Final dimensions, material, edge geometry and tolerances are confirmed from the approved requirements.