8000 v1.3.4 changelog · Issue #113 · sinara-hw/Stabilizer · GitHub
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v1.3.4 changelog #113

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Open
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maciejprzybysz opened this issue Jun 22, 2023 · 7 comments
Open
3 tasks done

v1.3.4 changelog #113

maciejprzybysz opened this issue Jun 22, 2023 · 7 comments

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@maciejprzybysz
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@jordens
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jordens commented Jun 22, 2023

We've had a report where the threaded part of a few DELOCK 65848 SMA connectors loosened itself from the square body when tightened with a torque wrench (to presumably 1 Nm). It would be very annoying if the connector doesn't survive even a few mating cycles with a torque wrend. I know proper tightening can be tricky, especially given the connectors density on our front panels. Could you double check that the connector survives 2 Nm torque? I don't have these laying around.

@jordens
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jordens commented Jun 26, 2023

@maciejprzybysz could you please check the above?

@maciejprzybysz
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@jordens We are going to check this, but we need few more days to close ongoing tasks.

@pkozakiewicz
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@jordens We checked durability of both Delock and Amphenol SMA connectors used in the past. None of them survived more than 1,2Nm. Are you able to identify the ID of the affected device?

@jordens
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jordens commented Jun 29, 2023

1 or 2 Nm? Failures with 1 Nm would be disappointing as that's "the" recommended torque and what a typical torque wrenche will do in practice.

@pkozakiewicz ID as in serial number?

@pkozakiewicz
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1.2Nm. Some sources on the Web claim that this value is even higher than recommended for brass SMA connectors.

Yes, I mean the serial number from the small sticker.

@jordens
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jordens commented Jun 29, 2023

The ones where we noticed it was Creotech, recent Urukuls.
But you are right. The recommended torque (Amphenol) for brass is 0.45 Nm, max 0.6 Nm. So they have an empirical safety factor of 2.

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