Snowball Catapult V2.0 | No Support

An upgraded catapult with real bearings, adjustable launch angle, and longer-lasting PETG springs.

This revised snowball catapult replaces print-in-place bearings with common 608 skate bearings for smoother, more reliable performance—no more fused bearings on textured build plates. The spiral springs are now printed in PETG, which makes a far better spring that resists wear and lasts much longer. A gear system winds the springs as you cock the arm, and releasing the trigger sends that stored energy launching your projectile.

Five adjustable pin positions let you easily change the launch angle and throwing power without pulling parts apart. Added knockout holes make disassembly simple if you ever need to take it apart. The gravity-reset trigger requires no spring, and an optional 6mm pin adds mass for a quicker, more satisfying reset.

Why This Design Is Awesome:

608 Skate Bearings - Common, inexpensive bearings for smooth, reliable rotation
PETG Springs - Longer-lasting springs that resist wear far better than PLA
Adjustable Launch Angle - Five pin positions to dial in distance and power
Gear-Driven Power Plant - Arm gear turns a pinion to wind the springs
Knockout Holes - Easy disassembly when needed
Gravity-Reset Trigger - No spring needed, works automatically
No Supports Required - T-slot connections and chamfered geometry print clean

Hardware Needed:

• 6× 608 skate bearings 

  Makerworld Link

  https://us.store.bambulab.com/products/high-performance-bearings?id=42489168232584

  Amazon Link

  https://www.amazon.com/SHKI/dp/B09PKD8QZZ/ref=sr_1_4?crid=2T1Q46267S1QD&dib=eyJ2IjoiMSJ9.0ORZ02jhtHiNHNfA95-_YlG3pRE1T10VT3P-Y17FaZRRmi2h1M9F_ZseWVs-nXpSWYTMsBE-hSP4sOoYmuNA7NAkwfffoKf4Rw0uRfV1vHWVGxHqeHXJZKpi6GtZMdNbI-60VkoMf9r8AYO31L6w_wOszxlYH11Es70sDU4bfm-pFCkPnTDfv05ZVXSCzSEkTaOSYRlzUpB-FytyZqO8By0_zDdx3nBHzRzn-903bYc.9mCeVpHhj84G5Lt5foZKPZIWIjKAwRlVHpcounFmIO8&dib_tag=se&keywords=608%2Bbearings&qid=1781038726&sprefix=608%2Bbear%2Caps%2C546&sr=8-4&th=1

• Hex pins (included as printed parts)
• 1× 6mm x 25mm pin (optional, for improved trigger reset)

Bill of Materials available through:

• MakerWorld Maker Supply (one-click ordering)
• Amazon (links below)

Tip: A press makes installing the bearings flush and square much easier. Check out our arbor press: https://makerworld.com/en/models/2199325-improved-3d-printed-arbor-press-v3-no-support?from=search#profileId-2389112

Complete Build Guide

Design walkthrough, print bed setup, and full assembly instructions: https://youtu.be/[VIDEO_LINK]

Help Us Keep Making Cool Stuff

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We'd love to see your build! Post a photo of your finished snowball catapult in the makes section so we can check out your print!

For STL licensing options, check out our Patreon: https://patreon.com/MacshayCreations