June 6, 2026
Description
CPSC Small Parts Cylinder & Small Ball Tester (16 CFR 1501 & 1500.19)
Combined 3D-printable compliance testing tools for U.S. Consumer Product Safety Commission (CPSC) small parts regulations — ideal for toy makers, Etsy sellers, and 3D printing businesses.
Features two tools in one model:
Small Parts Cylinder Tester (16 CFR Part 1501)
Inner diameter: 1.25 inches (31.7 mm) constant
Height: 2.25 inches (57.1 mm) straight through-hole design
6 mm walls for excellent rigidity
0.5 mm inner chamfer on the top rim
1 mm outer edge fillet for comfort and durability
Small Ball Tester (16 CFR 1500.19)
Hole diameter: 1.75 inches (44.4 mm)
Plate thickness: 6 mm (¼ inch)
0.5 mm inner chamfer
1 mm outer perimeter fillet
Key Design Details:
Optimized for 3D printing: sturdy 6 mm walls, light 0.5 mm chamfers on inner edges for smooth testing and better print quality, and 1 mm outer fillets to eliminate sharp edges.
Prints without supports in standard orientation.
Recommended Materials: PLA Pro, PETG, or ABS for good rigidity and dimensional accuracy. (Annealing recommended for extra strength and heat resistance if using PLA-based filaments.)
Perfect For:
Quality control when designing 3D printed toys, geode stands, keycaps, functional parts, or any children’s products
Checking for choking hazards before selling on Etsy or elsewhere
Makers who want a reliable in-house testing solution
Important:
Excellent for prototyping and internal verification.
For official compliance and Children’s Product Certificates (CPC), use calibrated CPSC reference fixtures and third-party lab testing.
Always measure critical diameters with calipers after printing.
Print Recommendations: 0.2 mm layer height, 3+ walls (or solid), 25–40% infill, slower outer perimeter speeds for highest accuracy.
Files included:
FreeCAD source file
STEP file (for easy import into any CAD software)
STL files (ready to print)
License:
Creative Commons — Attribution — Share Alike
Domenic Datti
