Bulk probe buy 7mm/Artemis Snowpeak/GK1
- By WobblyHand
- Tanks, Pumps, Compressors
- 3 Replies
So the probe arrived today. Only 8 days from ordering to receipt, which is very good. It's as described, and it probably is fine, but it's different enough that I did a few calculations on it to see if I'm substantially increasing my risk by using it. The one I received had a 3.54mm air hole in it. The OEM probe has a 2.5mm hole. The OD of the narrowest section of the QD is 6.18mm, vs the OEM dimension of 6.47mm. The safety margin of the OEM is 46% greater than the AliExpress version, assuming they are made of the same material, which appears to be stainless steel. It's not magnetic, and is likely to be 304. Stainless has a relatively low yield strength, it's comparable to A36 hot rolled steel. I calculate a yield to stress ratio of about 3.7:1 which should be ok, if it's 304 and I did the numbers right. So that's slightly greater than the 3.5:1 recommended.
I'll keep it in reserve, but I can't whole heartedly recommend the probe just because the design is closer to the edge than I feel comfortable with. Think I will machine some out of 1144 steel, mimicking the OEM probes, as the safety margin is nearly 4x greater. (about 14:1 yield to stress ratio). It will keep me off the streets this freezing week.
I'll keep it in reserve, but I can't whole heartedly recommend the probe just because the design is closer to the edge than I feel comfortable with. Think I will machine some out of 1144 steel, mimicking the OEM probes, as the safety margin is nearly 4x greater. (about 14:1 yield to stress ratio). It will keep me off the streets this freezing week.
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