Thick steel-rule dies such as Sizzix Bigz carry their own foam-covered blade block and never use a base platform or adapter plate. Before running a standard 5.5-inch Bigz die in a 6-inch Spellbinders Platinum 6, check the physical width, remove Platform Base A and Platform Top B completely, and confirm that two clear C cutting plates sandwich the die without forcing the rollers.
Check this setup in the finderA documentation-based guide, not a hands-on test. Manufacturer instructions support technical claims; community reports illustrate questions, not compatibility guarantees. How we check our sources.
On this page
- Why steel-rule dies never use a base platform
- Check cutting-plate dimensions and roller clearance
- How cardmakers compare Big Shot and Platinum 6 for thick dies
- How to distinguish Bigz, Bigz L, Bigz XL, and Plus steel-rule dies
- What changes when cutting chipboard, felt, or multiple cardstock layers
- Common questions about steel-rule dies in a Platinum 6
- Sources & review notes
Why steel-rule dies never use a base platform
Wafer-thin etched metal dies are only fractions of a millimeter thick and rely on Platform Base (A) and Platform Top (B) to reach the roller gap. Steel-rule dies (such as Sizzix Bigz) house a tall steel blade inside a thick wood-and-foam block. Leaving any platform underneath a steel-rule die will jam a manual roller machine immediately. [1] [2]
| Die category | Typical construction | Base platform role | Primary safety check |
|---|---|---|---|
| Wafer-thin metal dies (Framelits, Thinlits, Etched Dies) | Thin chemically etched metal ridge | Requires Platform Base + Top / Adapter | Keep blade ridge facing paper |
| Standard 5.5-inch steel-rule dies (Sizzix Bigz) | Thick block with foam ejection layer | Remove all platforms; use two cutting plates only | Never force into rollers; check width |
| Wide Bigz L / XL or Plus steel-rule dies | Exceeds 6-inch machine opening | Physically incompatible with 6-inch machines | Requires 8.5-inch or 9-inch machine |
Sizzix's own sandwich instructions for steel-rule Bigz dies place the die and material directly between two standard cutting pads with no Multipurpose Platform underneath. [2]
Check cutting-plate dimensions and roller clearance
Spellbinders documents its Universal Plate System (PL-127) around wafer-thin dies, 2D/3D embossing folders, and specialty systems. When cardmakers use standard Sizzix Bigz dies in a 6-inch machine, the stack consists solely of a bottom clear cutting plate, the Bigz die (foam blade side up), the material being cut, and a top clear cutting plate. [3] [4]
- Remove Platform Base (A), Platform Top (B), and all adapter shims (D, E, F) from your table before picking up a steel-rule die.
- Measure the physical width of the steel-rule die block; standard Bigz dies are 5.5 inches wide by 6 inches long, whereas Bigz XL or Plus dies require a wide-format opening.
- Test the entry of the two-plate sandwich into the rollers with zero crank force; if the rollers do not grip smoothly, stop rather than forcing the handle.
- Use dedicated cutting plates for steel-rule dies when possible, because thick steel rules score acrylic plates more deeply than wafer-thin dies.
How cardmakers compare Big Shot and Platinum 6 for thick dies
In forum discussions on Splitcoaststampers and Reddit, cardmakers moving between a Sizzix Big Shot and a Spellbinders Platinum 6 frequently ask whether their existing shelf of Sizzix Bigz dies will still work. Owners note that while standard 5.5-inch Bigz dies fit a 6-inch opening between two cutting plates, slight differences in cutting-plate thickness between brands can make a stack feel tighter or looser. [5] [6]
Treat community reports as a reminder to test roller entry gently rather than assuming every third-party cutting pad has identical thickness. Never add a platform or rigid plastic adapter to compensate for a worn cutting plate on a steel-rule die.
How to distinguish Bigz, Bigz L, Bigz XL, and Plus steel-rule dies
Not every die sold under the Sizzix Bigz name shares the same physical footprint. Before placing a used or borrowed steel-rule die onto a 6-inch machine bed, check the label and measure the outer plastic casing. [1] [2]
| Sizzix steel-rule family | Approximate die block width | Fits 6-inch Platinum 6 or Big Shot? | Required cutting pads |
|---|---|---|---|
| Standard Bigz (5.5" × 6") | 5.5 inches | Yes, width fits 6-inch opening | Two standard clear cutting plates (no platform) |
| Bigz L (6" × 8.75") | 6.0 inches nominal | Check clearance carefully; do not force if casing rubs side rails | Extended cutting pads if width clears freely |
| Bigz XL (6" × 13.75") | 6.0 inches nominal, extra long | Requires extended-length cutting pads and clearance check | Extended cutting pads (no platform) |
| Bigz Plus (A4 / 9-inch class) | Approximately 8.5 to 9 inches | No; physically wider than a 6-inch opening | Requires 8.5-inch or 9-inch wide machine |
When buying steel-rule dies secondhand, ask the seller for the exact product code printed on the label or measure the block width with a ruler. [6]
What changes when cutting chipboard, felt, or multiple cardstock layers
Because steel-rule dies house a deeper blade than wafer-thin dies, crafters often use them for heavyweight chipboard, wool felt, faux leather, or multi-layer paper cuts. However, a thicker material sitting on top of the ejection foam still adds slightly to the total compression under the rollers. [1] [4]
- Test a single sheet of heavyweight cardstock first before stacking multiple layers over a steel-rule die.
- Place the material directly over the foam blade area rather than letting thick chipboard hang over the plastic housing edges.
- Keep your dedicated bottom cutting plate oriented consistently so deep blade score lines do not transfer onto smooth card fronts.
- Never insert a metal adapter shim or plastic platform under a Bigz die; steel-rule blades are designed to kiss the top cutting plate directly.
Common questions about steel-rule dies in a Platinum 6
Do I use Platform Base A with a Sizzix Bigz die?
No. Never use Platform Base (A), Platform Top (B), or any adapter plate with a thick steel-rule die. The die block itself replaces the height of the platform.
Can I use my Universal Plate System (C) cutting plates with a standard Bigz die?
Standard 5.5-inch Bigz dies sit between two clear cutting plates with no platform underneath. Always verify that the sandwich enters the rollers smoothly without forcing the crank handle.
Why does my steel-rule die leave deep cut lines in my clear plate?
Steel-rule blades press directly against the top cutting pad after slicing through your material. Marking the cutting pad is normal; rotate and flip the pad regularly so wear stays even.
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Open the compatibility finder →Sources & review notes
Checked against the references below on November 7, 2026. Product packages and documentation can change. A brand name, nominal width, or similar appearance does not establish compatibility.
- Sizzix: die types and intended material categories
- Sizzix: machine-specific sandwich instructions
- Spellbinders PL-127: six-inch Universal system
- Spellbinders: die-cutting introduction and cutting-plate care
- Splitcoaststampers: Big Shot owner considering Platinum 6
- Reddit: buying used equipment and checking included platforms