Step 02.19 — Build the bearing/pulley stack on each shaft¶
Step 19 of 44 · Chapter 02 — Z drives, Z idlers, Z rails, deck panel
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Parts:
- 625-2RS bearings ×12 · Motion box
- GT2 80T pulley ×4 · Motion box
- M5 precision spacer 1 mm ×16 · Fasteners, Tools & Misc box
- the four shafts with their 20T pulleys · already on the bench
Do: On each shaft, outward from the 20T pulley: a 625 on its collar side; on the other side two M5 spacers, a 625, two spacers, 80T pulley, the last 625 at the end. Press by hand, inner race only.
Check
Your stack matches the p.33 graphic: both outer bearings spin free, no spacer trapped crooked, the 80T running true with no rim wobble.
What you're looking at
Manual p.33: the full stack on the shaft. Three 625-2RS bearings, plain 5 × 16 × 5 mm ball bearings, carry the shaft; the 80T pulley is what the short 188 mm belt drives, and the brass precision spacers set the spacing. See the glossary.
Caution
Rev D+ / LDO: the manual says "M5 Shim". The kit supplies brass M5 precision spacers instead — use those, everywhere in the manual from p.19 onward unless a note says otherwise. Four per drive, 16 for this chapter. src
Source: Voron manual p.33 · LDO Build Notes (Rev D) · Video: Part 2 @0:06:45