Replacement Parts & Classroom Refills
Welcome to the StackCalc Replacement Parts & Refill Center. We believe in zero-waste STEM education: never retire an educational kit because a tile or block rolled under a classroom radiator!
Instead of charging for digital STL downloads on Etsy or hosting cumbersome zip files on web servers, all 3D models, replacement parts, and pre-sliced 3MF plates are available 100% free on Printables. If your school doesn't have a 3D printer, you can order authentic, factory-manufactured replacements on-demand from our official partner, Slant 3D.
🔍 How to Identify Your Missing Piece
Every StackCalc physical manipulative kit and calculator Maker Kit includes a heavy-weight 4×6″ Archival Reference Card seated beneath the storage box lid:
- Check the Reference Card: Look at the exploded CAD schematic on the card to identify the missing component.
- Find the Part ID: Each component has a designated Part ID code (for example:
PLACE-TILE-7,FRAC-TOW-4,ALGB-UNIT-POS,BASE10-COUNTER,SC32-BATT-DOOR). - Choose Your Replacement Route:
- Have a 3D printer in your school or makerspace? Print it for free in minutes from Printables.
- No 3D printer available? Order factory-printed refills on-demand through our Slant 3D Portal.
📦 Two Ways to Replace Your Parts
Print for Free on Printables
Download verified single-part STLs and multi-plate .3mf slicer profiles for every kit. Standard PLA, 0% supports, calibrated for Prusa, Bambu Lab, Ender, and school fab lab printers.
Order On-Demand via Slant 3D
No 3D printer? We partner directly with Slant 3D for industrial-grade additive manufacturing. Order exact replacement blocks, individual color tiles, extra docking trays, or complete classroom kits shipped to your door.
📋 Common Part IDs by Kit
Quote these Part IDs when ordering via Slant 3D, searching Printables, or contacting support:
| Kit | SKU | Common Replacement Part IDs | Typical Print Time |
|---|---|---|---|
| Place Value Studio | PLACE-01 |
PLACE-TILE-0 to PLACE-TILE-9, PLACE-TOKEN-PLUS1, PLACE-TRAY-WHOLE, PLACE-TRAY-DEC |
~15–20 min per tile |
| Fraction Studio | FRAC-01 |
FRAC-TOW-1 (whole), FRAC-TOW-2 (half), FRAC-TOW-4 (fourth), FRAC-TOW-8, FRAC-BOX-3X1 |
~25–45 min per block |
| Prime Factor Studio | PRIME-01 |
PRIME-BLK-2, PRIME-BLK-3, PRIME-BLK-5, PRIME-BLK-7, PRIME-STAGE, PRIME-SLIDER |
~20–35 min per block |
| Ten-Frame Studio | BASE-10 |
BASE10-COUNTER (dual-color token), BASE10-CARRY-CUBE (2U cube), BASE10-STAGE-A |
~8 min per counter |
| Counting Tiles | COUNT-01 |
COUNT-TILE (18mm planar tile), COUNT-TRAY-10X10 (10×10 array tray) |
~5 min per tile |
| Math Dominoes | DOMI-01 |
DOMI-TILE-XX (Double-Six dominoes), DOMI-TRAY-12 (12-frame tray) |
~18 min per domino |
| Planetary Clock | TIME-01 |
TIME-QUAD-1 to 4 (color quadrant wedges), TIME-HAND-HR, TIME-HAND-MIN, TIME-GEAR-CORE |
~30 min per quadrant |
| Algebra Boxes | ALGB-01 |
ALGB-TILE-X2 (quadratic square), ALGB-TILE-X (linear rod), ALGB-TILE-UNIT-POS, ALGB-STAGE-90 |
~10–25 min per tile |
| Probability Dice | PROB-01 |
PROB-SPIN-BASE, PROB-SPIN-DIAL, PROB-FACE-6, PROB-DICE-D6 |
~15 min per dial |
| Trig Volvelle | VOLV-01 |
VOLV-DISC-BASE, VOLV-DISC-TOP, VOLV-PIN (snap axle) |
~45 min for set |
| Quest Scoreboard | QUEST-01 |
QUEST-TOKEN-10 (+10 score token), QUEST-BOARD-LID (3×1 lid) |
~6 min per token |
| SC-32 Hardware | SC-32-HW |
STAND-LEG-L, STAND-LEG-R, SC32-BATT-DOOR, SC32-CHASSIS-TOP, SC32-CHASSIS-BOT |
~35 min per stand leg |
💡 Quick Tips for Teachers & Makerspaces
- Batch Print Missing Units: In your slicer, duplicate the single tile to print 10 or 20 units in one job before class.
- Support-Free Geometry: All parts feature self-supporting angles (\(\le 45^\circ\)). Do not enable supports—they waste filament and create unnecessary cleanup.
- Two-Color Debossed Letters: Add a pause (M600) in PrusaSlicer / Bambu Studio at the layer where the debossed numbers start to swap filament colors for clean, high-contrast numerals.
- For More Detailed Instructions: See our comprehensive Makerspace 3D Printing Guide.
🌐 Connected Ecosystem & Official Channels
| Platform | Channel / URL | Purpose |
|---|---|---|
| Official Website | stackcalc.io |
Core interactive calculator, documentation, and student curriculum. |
| Printables | printables.com/@StackCalc_5593834 |
100% free open-source STLs and 3MF print plates for school makerspaces. |
| Slant 3D Portals | teleportpod.com/portals/profile/StackCalc |
On-demand commercial manufacturing for replacement pieces and classroom fleet sets. |
| Etsy Storefront | stackcalcmath.etsy.com |
Handcrafted 3D-printed manipulative boxed sets and hardware calculators. |
| Lulu Press | lulu.com/spotlight/stackcalc |
Spiral-bound lay-flat curriculum guides, student workbooks, and coach manuals. |
| Hackaday | hackaday.io/project/206743 |
Open hardware build logs, PCB fabrication notes, and firmware architecture. |
| Amazon | Amazon SC-32 (Paperback) • Amazon SC-32 (Hardcover) • Amazon SC-6 • Amazon Middle School Workbook | Thinking in the Stack (SC-32 Scientific), From Blocks to the Stack (SC-6 Elementary), and Middle School Math Blocks Workbook official print publications. |
Direct Support Channel
Need help identifying an unusual piece or ordering a custom school batch? - Email our engineering support desk: support@stackcalc.io - Quote the Part ID(s) from your reference card and the quantity needed. - We will respond with direct guidance or customized Slant 3D order links within 24 hours.