External BB Hollowtech II Tool for 44mm Cups
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Wstępna wycena dla PETG
1,20 € – 1,47 € netto (bez VAT)
Dla pliku: bike-bb-wrench (prusa)_0.3mm_PETG_MK3S_1h9m.gcode
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Plik użyty do wyceny
Średnia wycena orientacyjna: 1,33 € netto (środek widełek).
- Masa podana przez autora
- 22 g
- Czas druku podany przez autora
- 1,15 godz.
- Materiał u źródła
- PET
- Materiał wyceny
- PETG
- Drukarka wyceny
- Bambu Lab P1S - 0.4 nozzle
- Proces wyceny
- 0.20mm Standard
Orientacyjna wycena wyłącznie wybranego pliku, oparta na masie i czasie druku podanych przez autora. Warianty plików nie są sumowane. Ostateczna cena zostanie obliczona po analizie pliku.
Zapisane na tym urządzeniu.
Close fitting BB tool designed for cups with 44mm external dia, works with 3/8-inch (9.5mm) ratchet or 32mm spanner.
- Ocena
- 0 / 5
- Polubienia
- 9
- Pobrania
- 51
- Wydruki
- 0
- Wyświetlenia
- 210
- Oceny
- 0
Aktualizacja u źródła:
Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution — Noncommercial
Design Intent
This Hallowtech II style bottom bracket tool is designed to fit a Praxis M24/PF30 Bottom Bracket, which has a 44mm outer external diameter.
This Praxis bottom bracket has an expansion ring to prevent it from moving (squeaking & creaking), and seems to work well for me when mounted in a Specialized Crux 2013 carbon frameset with OSBB (62mm wide PF30), using 2x 3mm ASA spacers to make it 68mm. These Specialized frames have plastic cups that hold the bearings, but fail when used with GXP cranksets and with Wheels Manufacturing PF30 Adapter for 22/24mm Spindle Cranks (SRAM/TruVativ), for example when using a GXP powermeter crankset. Therefore I no longer need to use the Wheels Mfg. adapters in this frame, with this Praxis bottom bracket.
Usage
Use a 3/8 inch socket driver (same as 9.5mm socket driver), or a 32mm spanner (like the old style headset spanner, if you have one of those) or other wrench that fits the hex surface.
Printed as a plastic tool, it reduces the chance of scratching your fancy bottom bracket cups with a metal tool.
Printing
The included .gcode and .3mf use the settings below with PETG.
Avoid using supports: orient the tool with the 32mm hex side down on the printbed. The overhang is 60 deg, which most printers will print well when using 0.3mm layer height. You want to make it strong and nearly solid to allow you to put >52 Nm of torque on the part.
You can use PETG, ASA or PLA. I prefer the former because it's less likely to warp if stored in a toolbox that gets hot in the car at an event. PETG also prefers to deform before failing, so I find it to be safer to use.
Settings for Strength
0.3mm layer height (with 4mm nozzle)
6 perimeters/walls
6 bottom layers
6 top layers
50% infill (grid or similar pattern)
Material shrinkage may impact fit. It worked fine on my Prusa and Bamboo printers without compensating for shrinkage using PETG and ASA. However, consider making a test/draft print to verify the size/fit for your cups.
Designed With
OpenSCAD and Python