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Mikerobe

Veteran

Green Turtle Cay,Abaco, Bahamas.

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I'm restoring a GMP Cobra and would like to run Spinblades with 4mm stainless steel bolts. The rotor head has been repainted with Klass Kote and I was hoping to not have ugly, rusted steel bolts.

Wudda ya think?

The lot I got is not a lot, but I thank God a lot for the lot I got!

08-12-2016 11:46 PM
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madgadget

Senior Heliman

St Louis MO

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08-13-2016 12:23 AM
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madgadget

Senior Heliman

St Louis MO

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Or one of rcscrewz.com complete stainless kits for more bling

08-13-2016 12:24 AM
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JuanRodriguez

Elite Veteran

The Villages, Florida

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Don't believe stainless steel bolts would be recommended for that application.....

Been there, done that and old enough to know better.....

08-13-2016 12:48 AM
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Four Stroker

Elite Veteran

Atlanta

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See if you can find some K&S shinny 4 mm blade bolts - try Advantage - they are chromed steel. Or maybe nickel. Agree with Juan !

08-13-2016 02:00 AM
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Four Stroker

Elite Veteran

Atlanta

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08-13-2016 02:03 AM
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Chris Bergen

Elite Veteran

cassopolis, MI USA

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Definitely do not recommend stainless...

McMaster Carr has zinc plated grade 12.9...

Chris D. Bergen

08-13-2016 02:40 AM
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Mikerobe

Veteran

Green Turtle Cay,Abaco, Bahamas.

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Yeah, I was thinking a Cobra with asymmetrical Spinblades and an OS 45FSR would be minimal loading on 4mm stainless bolts.
The KSJ chromed bolts aren't easy to come by anymore. I have these on my 60 and 70 powered.
There are a few metric chromed online but finding a long-shanked 4mm hasn't been successful.

The lot I got is not a lot, but I thank God a lot for the lot I got!

08-15-2016 05:29 PM
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Chris Bergen

Elite Veteran

cassopolis, MI USA

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We use the ones from Mcmaster Carr, the threaded portion is too long, simply cut it down to the length you need.

The shank is long enough (for our blade grips) to reach the other side of the grip...

Chris D. Bergen

08-16-2016 08:58 PM
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Mikerobe

Veteran

Green Turtle Cay,Abaco, Bahamas.

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Hi Chris,
I may just do that! I'll see what else I can justify for an order from McMaster.
Any new colors in the G10?!

The lot I got is not a lot, but I thank God a lot for the lot I got!

08-17-2016 02:01 AM
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Chris Bergen

Elite Veteran

cassopolis, MI USA

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I got all the Henry Ford colors!!

Chris D. Bergen

08-17-2016 02:24 AM
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Mikerobe

Veteran

Green Turtle Cay,Abaco, Bahamas.

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I got all the Henry Ford colors!!
Har-Har! I've hijacked my own thread here haven't I?

The lot I got is not a lot, but I thank God a lot for the lot I got!

08-17-2016 01:46 PM
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kencol

Heliman

Australia

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Stanless is Brittle[not a good plan unless you wear body armour]

Good Heli flying is throwing it at the ground and missing

08-20-2016 11:07 AM
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w8qz

Veteran

Grand Rapids, MI - USA

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Stainless is not necessarily brittle - depends on the alloy, grade, heat treat, etc.
The typical hardware-store stainless fastener is a relatively soft material, usually one of the free-machining grades, with a minimum yield strength of 30 KSI (assuming MS51957 screws are similar). If you get a stainless fastener out of heat-treated A286, those typically are high-strength.
If fastener strength is important, you need to get the actual specs for the fastener you want to use. But, this is not easy to come by from your local hardware store - the clerk probably would have no clue what you're talking about.

"The helicopter is much easier to design than the aeroplane, but is worthless when done."

11-18-2016 05:29 PM
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JuanRodriguez

Elite Veteran

The Villages, Florida

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But, this is not easy to come by from your local hardware store - the clerk probably would have no clue what you're talking about.
And that is exactly why it is not recommended for this application..... unless, that is, you know exactly what you are doing.... most don't.....

Been there, done that and old enough to know better.....

11-18-2016 11:35 PM
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Pistol_Pete

rrProfessor

Seffner, FL

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I was hoping to not have ugly, rusted steel bolts
http://www.Corrosionx.com

~~Enjoying the hobby one flight at a time~~

11-19-2016 02:29 PM
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