Which material for bike chainring spacers?

#1

I am thinking to print some chainring spacers for my bike because the size is not available commercially. It’s a simple ring approximately 12mm OD, 10mm ID (1mm wall), 3mm high, with 0.25mm edge chamfer. I need the 2 sides to be parallel. Connecting support structures or sprues for infusion is ok on the cylindrical side, but not good on the flat top/bottom.

Which material is suitable and most durable under load?

I think the possibilities are:
Stainless Steel (has sprue, possible dimensional shrinkage)
High Detail Stainless Steel (conflicting information on material page, one says SLM (would have support structure), other says jet head with binder (video shows no support structure with flat parts, printed directly on plate))
Brass
Bronze
Aluminum (support structure, cut off from base)

#2

Hello,

For your purpose we would recommend to use high detail stainless steel. It is indeed produced by means of a jet head with binder and requires no supports. We do guarantee our prints suitable for decorative purposes. However utilitarian and functional use of the parts is at your discretion.

Let me know if you have more questions.

Best regards,
Tetiana

#3

The part I require measures 130mm x 130mm x 45mm with a wall thickness of 1.5mm. I would also need the part to be polished. Is this possible?

#4

Hello,

Unfortunately not. The maximum size of the model that we can print in High detail stainless steel is 45x45x45 mm. For polished part I would advise you stainless steel, but you should take accuracy and shrinkage compensation into account. Aluminum part will be more accurate, however this material is available in natural (unpolished) finish only.

Best regards,
Tetiana