This heart-shaped lock symbolizes commitment, trust, and emotional connection, making it a perfect Valentine’s Day keepsake. The clean geometry and split-heart design are ideal for precise 3D printing, highlighting the contrast between two halves joined by love.

Best Material

PLA – Great for multicolor printing, crisp edges, and gift-ready results

Resin – Recommended for a premium, jewelry-like finish with smooth surfaces

Layer Height

0.12 mm for PLA on Creality K1C (sharp details and smooth curves)

0.05 mm for Resin (high-end romantic presentation)

Supports

Supports required (minimal)

Light supports are suggested under the top ring and inner zig-zag connection to ensure clean overhangs and accurate detail.

Orientation

Print upright, heart base facing down on the build plate.

This maintains symmetry between both halves and preserves the lock ring geometry.

Scale Suggestions

65 mm → Valentine keychain or small gift

100 mm → Romantic desk or shelf decoration

150 mm → Statement Valentine centerpiece

Locked Hearts of Destiny – Noah0x03

0.24mm layer, 2 walls, 15% infill