Profile Tube Mounting Bolt

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Nacho
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Profile Tube Mounting Bolt

Postby Nacho » Thu Mar 19, 2015 3:15 pm

I am busy replacing most nuts and bolts. I removed the profile tube holder bolt yesterday. It is mildsteel from the looks of it and was badly rusted. I replaced it with a stainless steel bolt, ss washer and ss niloc... total cost R9.90. When last did you inspect this bolt? (^^)
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Re: Profile Tube Mounting Bolt

Postby Alkemac » Thu Mar 19, 2015 3:21 pm

Just a question - did you also think of replacing the bolt holding the bracket on :shock:
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Re: Profile Tube Mounting Bolt

Postby Nacho » Thu Mar 19, 2015 3:34 pm

That is the same bolt. It runs straight through the bracket.
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Re: Profile Tube Mounting Bolt

Postby justin.schoeman » Thu Mar 19, 2015 5:31 pm

Nacho wrote:I am busy replacing most nuts and bolts. I removed the profile tube holder bolt yesterday. It is mildsteel from the looks of it and was badly rusted. I replaced it with a stainless steel bolt, ss washer and ss niloc... total cost R9.90. When last did you inspect this bolt? (^^)
Beware of stainless steel bolts:
1) they have terrible fatigue characteristics, and should never be used for critical structural parts.
2) stainless steel corrodes aluminium (galvanic corrosion).
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Re: Profile Tube Mounting Bolt

Postby D2O » Thu Mar 19, 2015 5:53 pm

Should you not rather use an AN bolt?
They're a lot more expensive, but I'd consider it an investment in safety.
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Re: Profile Tube Mounting Bolt

Postby justin.schoeman » Fri Mar 20, 2015 12:27 am

D2O wrote:Should you not rather use an AN bolt?
They're a lot more expensive, but I'd consider it an investment in safety.
Always be careful substituting components - you do not know what the designer intended when choosing a specific part. I can not see the head of the bolt, but most cap screws are grade 12.9. This has a significantly higher shear strength than the same size AN bolt. So switching to AN could turn out to be a big mistake.

Rather replace with exactly the same spec as the manufacturer used, or confirm with the manufacturer before substituting any part.
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Re: Profile Tube Mounting Bolt

Postby Nacho » Fri Mar 20, 2015 8:59 am

Speaking to the manufacturer now. Will keep you posted on the reply.
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Re: Profile Tube Mounting Bolt

Postby mulderpm » Fri Mar 20, 2015 1:23 pm

Fully agreed with Justin. From Microcrafts Africa (Solo Wings) you can buy a full bolt replacement kit at a very reasonable price.

Replace with exactly the same fastener & nut & washer as the manufacturer recomends and your plane will be in spec and safe. Also, tighten to the manufacturers tourque setting, never overtighten.
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Re: Profile Tube Mounting Bolt

Postby witwillem » Sun Mar 22, 2015 5:48 pm

i replace mine with a 8',8 bolt from solow wings (**)
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Re: Profile Tube Mounting Bolt

Postby Dobbs » Tue Mar 24, 2015 4:36 pm

Agree with 8.8, but beware of s/s, as mentioned, it is not known for its ability to tolerate vibration
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Re: Profile Tube Mounting Bolt

Postby Nacho » Tue Mar 24, 2015 5:49 pm

Correct Bolt is a HT (High Tensile) with a Hex head.

http://en.wikipedia.org/wiki/Ultimate_tensile_strength
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Re: Profile Tube Mounting Bolt

Postby Nacho » Wed Mar 25, 2015 6:03 pm

This is the correct cap screw. 12.9 HT

This screw plus Niloc = R3.90
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Re: Profile Tube Mounting Bolt

Postby Louis Geldenhuys » Wed Apr 22, 2015 9:21 am

Only use cap screw. 12.9 High tensile
Cadmium plated !
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Re: Profile Tube Mounting Bolt

Postby nicow » Thu May 14, 2015 7:59 am

golddty wrote:It sounds really good, too wonderful!
Lyk my hier kom weer 'n spammer...
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Re: Profile Tube Mounting Bolt

Postby klein » Thu May 14, 2015 9:04 am

Back to the bolt.

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