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Ch 08 › B — Clockwork 2 extruder9 / 65

Step 08.9 — Build the BMG idler assembly and grease it

Step 9 of 65 · Chapter 08 — Toolhead: Stealthburner, Clockwork 2, Revo HF, Nitehawk-SB V2

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gather Gather for this segment — steps 08.9–08.18 (~30 min)

Motion box

  • Bondtech IDGA gear set ×1
  • Thumb Screw Kit ×1
  • MR85 bearing ×2

Fasteners, Tools & Misc box

  • M3×16 SHCS ×1
  • M3×6 FHCS ×1
  • M3×25 SHCS ×2

Printed parts

  • [a]_guidler_a ×1 · bin 08-CW2
  • [a]_guidler_b ×1 · bin 08-CW2
  • [a]_latch_shuttle ×1 · bin 08-CW2

Tools and consumables

  • light grease, Super Lube
  • sandpaper, fine
  • medium-strength threadlocker
  • caliper
  • 1.75 mm filament, a 100 mm offcut

Already on the bench

  • the greased idler assembly
  • the motor plate with its inserts
  • the drive shaft from the IDGA set
  • the MR85 in the motor plate
  • the CW2 main body with its inserts
  • the drive assembly
  • the CW2 main body

Parts:

  • Bondtech IDGA gear set ×1 · Motion box
  • light grease, Super Lube · consumable

Do: Slide the IDGA set's idler gear, shaft and bearing sleeve together. Wipe a thin film of Super Lube 21030 onto the bearing surfaces (verify on bench). Toothed face towards the filament path.

check Check

The idler spins freely with no gritty feel and no axial slop.

What you're looking at

A Bondtech dual-drive extruder grips filament between two geared wheels, not one wheel and a plain bearing. This is the second: the BMG idler gear, running on a bearing sleeve on its own shaft, toothed face towards the filament.

Source: SB manual p.17

← PreviousStep 08.8 — Confirm the X carriage is ready to receive a toolhead

Next →Step 08.10 — Close the guidler arm