TPU liner primary

Split-finger liner with 8 splines that drop into the knob's 8 flutes and take up the taper. Print slowly (15-30 mm/s). Fit depends on the knob diameter, which is estimated from photo, not caliper (tip about 13 mm, top not measured).

Download STL (50 KB, binary)

File

hardware/stl/knob_cup_coupler_liner_TPU.stl

Bounding box

16.78 × 16.78 × 22.00 mm (X × Y × Z, as exported; Z up from the bed)

Volume

1.37 cm³; ≈ 1.7 g if printed solid in TPU (real mass depends on walls and infill)

Mesh

1,028 triangles

Material

TPU 95A

Layer

0.16-0.2 mm

Walls / infill

2-3 walls, 100 %

Orientation

Upright as exported, solid 4 mm ring end down.

Supports / brim

None. 3 mm brim (small contact area); glue stick as release on smooth PEI.

Quantity

1 per head

Versions

ABCD

See it in the assembly →

Print settings are starting points from ASSEMBLY.md and the print plan, not values tested on this design. Dimensions that depend on the knob, rod or clip are estimated from photo, not caliper.