- Fri May 02, 2025 11:43 pm
#22294
The quick answer is don't do it for a customer, the legal liability is huge and will never be worth the money you charged. A certified air bag sewing machine starts over $60k and goes up quickly, then you have to be trained and keep records on all the airbags you did. Testing? hugely expensive. Do people do it, yup, but it's a legal risk. To technically answer the question you are creating a "break away seam" so your bobbin thread has to be far weaker than your top thread, if you have "french seams" don't use re-enforcing tape under the break away part of the seam. Can you prove your seam is the same specification as the manufacturer requires from the specific air bag in your seat? No, not without destructive testing and that's not feasible for a small shop.