Maximum Size Fully 3D Printed Conical Bearing Turntable

The largest and most capable version of my fully 3D printed Lazy Susan system — engineered for heavy loads, large platforms, and smooth controlled rotation without metal hardware or supports.

The 340mm version represents the upper end of the Version 3 radial bearing family, scaling the conical roller system for maximum load distribution and structural stability while preserving snap-together simplicity.

Why I Designed This

At large diameters, traditional printed turntables struggle. Friction increases. Side rubbing amplifies noise. Flex becomes noticeable. Many designs compensate with hardware.

I wanted a truly scalable radial bearing system that:

• Maintains correct rolling geometry at large diameters
• Eliminates side wall rubbing
• Reduces binding and vibration
• Distributes load across more rollers
• Prints cleanly without supports
• Snaps together without hardware

Version 3 refines conical tilt alignment, roller retention, and carrier geometry into a stable, smooth-running large-format solution.

What’s New in Version 3

• End-captured conical rollers (no side wall rubbing)
• Tilted conical alignment for improved race geometry
• Larger bearing diameter for smoother, quieter rotation
• Flat carrier interfaces to reduce resistance
• Redesigned lighter carrier ring with improved axial stability
• Completely flat base bottom
• Optional reduced bearing count for ultra-quiet mode

Key Features

• 340mm outer diameter
• 100% 3D printed
• Snap-together assembly
• No supports required
• Multiple top options included:
  • Fully enclosed Lazy Susan top
  • Radial bearing top with screw tabs
  • Radial bearing top without screw tabs
• Increased roller count for maximum load distribution
• Quiet operation when bearings are printed in TPU
• Part of the scalable Lazy Susan v3 family

Use Cases

• Large workshop turntables
• Kitchen island rotating trays
• Heavy-duty display platforms
• Photography and product turntables
• Rotating storage bins
• Mounted rotating platforms
• Mechanical education demonstrations

How It Works

This design uses conical rollers tilted by half the cone angle. This creates:

• A flat bottom race for smoother rolling
• A steeper top race for cleaner FDM print geometry

Rollers are retained at their ends using small indents and carrier nubs, eliminating side rubbing and reducing binding, vibration, and noise.

The carrier must be installed with the connecting bars facing upward. Orientation matters.

You may assemble using:

• Full bearing count for maximum load capacity
• Half or even 1/4 of the bearings for quieter operation (reduced load capacity)

All parts print separately and snap together. No hardware required.

Important Notes – Bearings & Print Quality

• The conical bearings are specific to each size model
• Bearings from one diameter (120, 160, 200, etc.) will NOT work correctly in another size
• Do not mix bearings between models
• Always print the bearings included with that specific version

Slicer Note – Seam Settings Matter

The conical rollers perform best when the outer surface is smooth and consistent.

• If your printer produces very clean walls, no adjustment is needed
• If you notice a strong vertical seam bump, you may feel a slight rhythmic tick as the roller turns
• Switching seam placement from "Aligned" to "Random" often reduces the noticeable bump
• Reducing seam prominence improves smoothness and noise performance

A clean outer wall on the rollers makes a noticeable difference in rotation quality.

Print & Slicer Settings (Recommended Starting Point)

• Nozzle: 0.4mm
• Layer height: 0.2mm
• Walls: 4 perimeters (increase for heavy-duty applications)
• Top/Bottom: 5 layers (increase for structural tops)
• Infill: 40% (100% for bearings)
• Supports: None required
• Wall generator: Arachne recommended

You can print all parts in PLA or other materials. Bearings operate noticeably quieter when printed in TPU.

You can print all parts in PLA or other materials. Bearings operate noticeably quieter when printed in TPU.

Available Sizes

• 120mm
• 160mm
• 200mm
• 240mm
• 280mm
• 310mm
• 340mm

Related Links

Join the LogicalPlanet Discord https://linktr.ee/logicalplanet

Visit my blog for more details and other designs https://www.logicalplanet.com/

Revisions and Updates I occasionally update and revise my designs. When I do, I’ll document the changes here. Check back periodically for the latest revision notes or if you’re experiencing any issues with a model. Please email me at logicalplanet3d@gmail.com if you would like me to make a revision or have comments about this design.