Cast Iron Motor Brackets
Cast Iron Motor Brackets
(OP)
I have some motor brackets for overhead doors that are made out of cast Iron... One of these motor brackets broke into two pieces, this is where I found Large 1/8"-1/4" air bubbles in the casting.. my question is where can I find a specification for the Minimum size of the air bubble sizes in casting of these parts
I have looked at the ASTM Ferrous Specifications and can not find anything that refers to the casting other than Piping and Flanges
maybe there is no Spec. for these parts not sure
when this part broke it cost a lost time accident so I want to get a path forward for the remaining ones but need a base to inspect to any information will help Thanks in advance
I have looked at the ASTM Ferrous Specifications and can not find anything that refers to the casting other than Piping and Flanges
maybe there is no Spec. for these parts not sure
when this part broke it cost a lost time accident so I want to get a path forward for the remaining ones but need a base to inspect to any information will help Thanks in advance





RE: Cast Iron Motor Brackets
If the castings are not produced to any specification or there are no specific requirements regarding severity of flaws, you are stuck.
RE: Cast Iron Motor Brackets
ASTM standards for CI should guide you regarding acceptance criteria for these defects. Can you radiograph a few castings to know the presence of blow holes in the casting? Normally for a batch 5% of the castings need to be radiographed,before accepting them.
" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke
RE: Cast Iron Motor Brackets
RE: Cast Iron Motor Brackets
The best way to minimize grief in the future is to develop a soundness drawing showing exactly where and to what extent discontinuities can be allowed.
RE: Cast Iron Motor Brackets
A simple destructive hammering of the casting in the suspected region might suggest the existence of any major flaw. This can help decide if there is a need to proceed with expensive radiography test or simply scrap the castings. Please remember no salvaging is possible or permitted.
" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke