Roly Poly No. 3

Servo

No. 3 · Small and light

Narrow, light and quick: 52.5 mm across, 39 wide and 58 grams, for fast tricks where a heavier yoyo gets in the way.

A$109
Coming soon ⌀ 52.5 · 39.0 · 58.0 g

3 colourways, 3 places

  • MulgaCharleville, Qld26.40° S · 146.24° Esolid · blasted
  • WattleCanberra, ACT35.28° S · 149.11° Esplash · two dyes
  • Burn-offKakadu, NT12.67° S · 132.83° Esplash · four dyes

The Servo, in section

39.0⌀ 52.5gap 4.30
Diameter
52.5 mm
Width
39.0 mm
Gap
4.3 mm at the pads
Weight
58.0 g built, with bearing and axle
Spin inertia
244 g·cm² 90% of it in the outer 30% of the radius
Material
6061-T6 bead-blasted, anodised
Bearing
Size C (R188) 6.35 × 12.7 × 4.76 mm
Response
19 mm slim pads sit 0.05 mm under the wall
Axle
M4 × 10 set screw

A servo is where you stop for petrol: in and out, no hanging about. This one is for tricks that change direction a lot, where a light yoyo keeps up and a heavy one argues.

Inside the Servo

Keep scrolling and it comes apart.

  1. Two halves · 6061-T6 · 27.6 g each
  2. Two pads · 19 mm slim
  3. Bearing · size C
  4. Axle · M4 × 10
Its printed twin

Print a Servo first

Same outside, same 58.0 g in solid PETG, 89% of the metal one's spin. Print the half twice. Print the fit test first: if the bearing's tight or loose in it, it will be in the half too.

  • Metal58.0 g · cup lip at 22.38 mm
  • Print58.0 g · cup lip at 14.49 mm
  • SettingsPETG or PLA at 100% infill, 0.12–0.16 mm layers, face down, tree supports inside the cup only
  • PartsSize C bearing, two 19 mm slim pads, M4 × 10 set screw