In my business I run 50-200 MJF parts at a time, where the final parts (in my case MJF with vapor polish) are used as the housing for a high end electronics product. Unfortunately the manufacturing quality is very spotty if you are seeking a nicely finished product and they make it extremely difficult to return things. You regularly hear "looks good to me" "our regular machine was down" types of comments to address the cosmetic issues instead of getting real help to replace parts you cannot use. Bottom line - It is great if you are a hobbyist and not reselling the part. If you are looking for true manufacturing quality and someone who will accept responsibility for their work; I would go to Hubs or an alternate source who understands real world manufacturing vs making parts for 3d printing enthusiasts. I've been ordering(painfully) for the past few years and it has been a constant battle to get parts that are defect free. Unfortunately they don't see or treat you as a partner, like a regular/professional manufacturer would.
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Jawstec is a nylon 3D printing service provider with fast online quoting, an expert staff, & great service, guaranteeing our work exceeds expectations.