Welding on props?

**tnelsmn** · 06-23-2021, 04:04 PM

Originally Posted by loop

looks good
hopefully you used the ER630 wire?

I welded it with ER308 which is also listed as a filler for Precipitation Harding stainless steel. I didn't have any ER630 when I did it, and welded it before I saw the comment from Chaz. I'll see how it runs tomorrow.

Chaz, I wouldn't run anything other than a gas lens.

**Chaz** · 06-23-2021, 10:29 PM

Originally Posted by tnelsmn

I welded it with ER308 which is also listed as a filler for Precipitation Harding stainless steel. I didn't have any ER630 when I did it, and welded it before I saw the comment from Chaz. I'll see how it runs tomorrow.

Chaz, I wouldn't run anything other than a gas lens.

Anybody that gotz "TWO" Dotco drill motors ... is in the club as far as I can see ..

Speakin of seein ... I gotz some .035 wall tubing to glue together over the next couple of days .. So I thought I'd treat myself to a new diopter lens for my he!!-met cuz my 1.25 is yellowing and has a scratch .. in my line of sight (naturally)

They recommended a 2.50 ....

**rjdubiel** · 06-24-2021, 05:48 AM

Well, the water is tough on choppers here in MN apparently. Just checked my small ear 30 and guess what.......

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**XP300** · 06-24-2021, 06:33 AM

Originally Posted by Chaz

I send everything out to be Chryo treated .. makes a difference ...

This is some of the Best Advise that is simple and overlooked but carries extreme benefits.
totally agree.
tnelsmn there is a company in Blaine that is one of the best for this service.

**rjdubiel** · 06-24-2021, 07:44 AM

Arrow Cryogenics? Silly question, can a prop be treated with the hub in it? Also, they have two processes, both cool the part to -300*, but one heats back to +300* the other just returns to room temp. Which process is the better for a prop?

**wicheckmate** · 06-24-2021, 08:52 AM

well they were originally designed for the inline V6 motors so they don't like the torque and higher HP of the 2.5's. and such.

Originally Posted by rjdubiel

Well, the water is tough on choppers here in MN apparently. Just checked my small ear 30 and guess what.......

**rjdubiel** · 06-24-2021, 09:17 AM

yep, but it worked so nice on my Vking and my Viper. It is thin as well so I was surprised it lasted this long!

**JR IN JAX** · 06-24-2021, 06:35 PM

I just had my Hill 30" Drag 5 crack 3/4 of the way across [front to rear] and mid blade even though it looks brand new. I was stopped at the gas station and a guy admiring my boat pointed out that my prop was cracked. I am going to try a 31.5 Promax that Mercury Racing and the Allison Rep [Dingo] suggested. Needless to say it is on backorder by Merc for another two weeks.
I would be tempted to weld the Drag 5 but there seems to be a trend of them breaking.

**Dave S** · 06-24-2021, 07:05 PM

Ever wonder why props throw blades and prop shafts shear........

.......hint.......SSM........

**Chaz** · 06-26-2021, 10:09 AM

Dave ... I'll take "Super S***ty Metals" for $600 please ......

**FUJIMO** · 06-26-2021, 11:39 AM

...unfortuneate to think, that other customer props will fail, as this one did, with no recourse. shameful & a big waste of hard earned money...

**NZ Sidewinder** · 06-26-2021, 06:04 PM

Stainless and welding is always a compromise.
Welding will always take some stuff away from the base metal and add something unwanted.
One significant unwanted is stress.
Id ask myself why did this blade crack in the first place?
Then ask myself if it was likely to happen again to that blade or any of the others.
Personally I would not feel comfortable running a high stress prop with a radial type repair.
Just my opinion from 30 yrs of high end ASME welding and a reasonable amount of exotic blade repairs in Hamilton Jet units
Jet blades are far more forgiving than these.

**SUNKIST** · 06-26-2021, 06:49 PM

Leading edge propeller did this work...years ago, highly recommended...for repair and information.

this propeller was "wasted" cracks everywhere

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"everything I own is used, my wife, my girlfriend, my car, my house and my propellers"

**Chaz** · 06-27-2021, 12:14 AM

Originally Posted by NZ Sidewinder

Stainless and welding is always a compromise.
Welding will always take some stuff away from the base metal and add something unwanted.
One significant unwanted is stress.
Id ask myself why did this blade crack in the first place?
Then ask myself if it was likely to happen again to that blade or any of the others.
Personally I would not feel comfortable running a high stress prop with a radial type repair.
Just my opinion from 30 yrs of high end ASME welding and a reasonable amount of exotic blade repairs in Hamilton Jet units
Jet blades are far more forgiving than these.

It is said ... That the Ford blocks that went thru a winter stored out by the rail road tracks .. machined easier and held tolerances better , for longer.

Hence , the meta-lax table and cryogenics industry's were born .

My old crank grinder buddy had a table. When he retired , I lost track of where his equipment went . It does drop the harmonics needle on the gauge ..

https://www.bonal.com/

Deep freeze .. is the poor mans heat treat ...

If you can find a shop in your area that has "Zyglo" equipment (I have an old Goodson magnet and iron particle kit , not very good on alum or stainless LOL ) , and your regimented enough to have your wheels inspected every 100 hours or so , then you might catch failures as they are just starting .. well before ya feel a bad vibration and look at the Mrs, and both say .. Honey , was is that ..

https://www.ndtsupplies.com/600089.h...xoCGgAQAvD_BwE