/ErcpBearingSpool

Bearing spool arm for Enraged Rabbit Carrot Patch

ErcfBearingSpool

This is a bearing version of the filament spool holder of the Enraged Carrot Feeder Patch (ERCP) buffer.

The original design can be found at ercf.

This modification is based on the version taken on August 2023. It remove lots of friction compare to the original one (PTFE version). I'm getting less failure rate with the bearing version.

It support filament spool up to 80 mm wide.

It uses two 608 bearing plus 95 mm of thread rod. That threaded rod could be M8 (metric) or 5/16" (imperial). I provide the STL for both version.

By the way, the term "vitamin" simply mean non printer part. Apparently the origin comes from reprap reprap.

Documentation generated by the OpenSCAD library NopSCADlib.

Main Assembly

Table of Contents

  1. Parts list
  2. Roll Assembly
  3. Handle Part1 Assembly
  4. Handle Part2 Assembly
  5. Optional MainBody Assembly
  6. Main Assembly

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Parts list

Roll Handle Part1 Handle Part2 Optional MainBody Main TOTALS
Vitamins
  2    .    .    .    .    2     Ball bearing 608-2RS 8mm x 22mm x 7mm
  .    1    .    .    .    1     Heatfit insert M3 x 4mm
  .    .    1    .    .    1     Screw M3 cap x 10mm
  .    .    .    .    1    1     Threaded rod M8 x 88mm
  2    1    1    .    1    5    Total vitamins count
3D printed parts
  .    .    .    .    1    1    bearingSH_5_16.stl
  .    .    1    .    .    1    bearingSH_M8.stl
  .    .    .    1    .    1    mainBodyNoShoulder.stl
  .    .    .    .    1    1    nut_5_16.stl
  .    .    .    .    1    1    nut_M8.stl
  1    .    .    .    .    1    roller.stl
  .    .    .    .    1    1    spacer1mm.stl
  .    .    .    .    1    1    spacer3mm.stl
  1    .    1    1    5    8    Total 3D printed parts count

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Roll Assembly

Vitamins

Qty Description
2 Ball bearing 608-2RS 8mm x 22mm x 7mm

3D Printed parts

1 x roller.stl
roller.stl

Assembly instructions

roll_assembly

  1. Insert the bearing 608 at both end of the spool cylinder

roll_assembled

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Handle Part1 Assembly

Vitamins

Qty Description
1 Heatfit insert M3 x 4mm

Assembly instructions

handle_part1_assembly

  1. Install the insert on the handle.

handle_part1_assembled

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Handle Part2 Assembly

Vitamins

Qty Description
1 Screw M3 cap x 10mm

3D Printed parts

1 x bearingSH_M8.stl
bearingSH_M8.stl

Sub-assemblies

1 x handle_part1_assembly
handle_part1_assembled

Assembly instructions

handle_part2_assembly

  1. Remove the support.
  2. Install the handle with a M3x10 screw ("[a]_Handle_x.stl", piece from the original design, not included here).

handle_part2_assembled

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Optional MainBody Assembly

3D Printed parts

1 x mainBodyNoShoulder.stl
mainBodyNoShoulder.stl

Assembly instructions

optional_mainBody_assembly

  1. This is an optional assembly
  2. If you want to be able to remove the spool from the buffer by pulling the handler you have two choices:
  3. If you're are modifying an existing buffer then you have to cut the shoulder.
  4. If you're building a new buffer then you can print "mainBodyNoShoulder.stl". The shoulder has been removed on the stl.

optional_mainBody_assembled

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Main Assembly

Vitamins

Qty Description
1 Threaded rod M8 x 88mm

3D Printed parts

1 x bearingSH_5_16.stl 1 x nut_5_16.stl 1 x nut_M8.stl
bearingSH_5_16.stl nut_5_16.stl nut_M8.stl
1 x spacer1mm.stl 1 x spacer3mm.stl
spacer1mm.stl spacer3mm.stl

Sub-assemblies

1 x handle_part2_assembly 1 x optional_mainBody_assembly 1 x roll_assembly
handle_part2_assembled optional_mainBody_assembled roll_assembled

Assembly instructions

main_assembly

  1. Screw the threaded rod in the bearingSH. Don't overthight.
  2. Insert a 1 mm spacer
  3. Insert the roller
  4. Insert a 3 mm spacer. You might need to use a thinner or a thicker spacer such that the nut end up flush with the roller.
  5. Screw the nut. Don't overthight. Make sure the roller turn freely.

main_assembled

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