Best "liquid steel" epoxy, polymer, etc??

[MatBirch]

I need a good one, and have never been too happy with the results of JB Weld. What are your experiences?
FWIW-
This will be hopefully extending the life of damaged splined shaft w/ sprocket. The shaft is very expensive, labor is very intensive, and downtime is a killer...
I can weld the sprocket on, and have seen it done with some success, but I'd rather try this first, as there is no return once I weld.

Thanks!!

 

[dave89iroc]

We use a product called Belzona at work, not cheap though, over $300 for the belzona 1111 in the 1kg package we use

http://www.belzona.com/en/products/1000/1111.aspx

 

[rlitman]

Belzona makes a number of products. They are the best in the business!
Not everything of theirs is super expensive. They make stuff in single-use size packs too.

 

[BearsFan315]

so are you using the "liquid steel" to reshape the splines ?? or as a glue to hold the sprocket on ??

as for belzona we use that to repair castings and machined parts all the time here. and you can machine it if required. we do this all the time to build up a surface.

 

[Radix2]

so are you using the "liquid steel" to reshape the splines ?? or as a glue to hold the sprocket on ??

as for belzona we use that to repair castings and machined parts all the time here. and you can machine it if required. we do this all the time to build up a surface.

Can you say a bit more about what type of castings, material, temperatures, etc. that you use this for?

 

[VintageVeloce]

This is what you need. Titanium Putty. http://www.devcon.com/products/products.cfm?familyid=124

Sent from my MotoG3 using Tapatalk

 

[MatBirch]

so are you using the "liquid steel" to reshape the splines ?? or as a glue to hold the sprocket on ??.

gluing the sprocket on. it is still fully functional, but starting to give. damage was discovered during a sprocket change.

 

[rlitman]

Surface prep is everything here!

 

[LXCam]

Good luck. I sure don't know of any resins that could handle the torsional load of a gear.

 

[EOC_Jason]

This is what you need. Titanium Putty. http://www.devcon.com/products/products.cfm?familyid=124

I have a friend that uses Devcon a lot too, not that one but some other specialist kind they sell. He wouldn't even think about touching another brand.

Like someone else said, surface prep is everything as is following directions for application, temperature, cure time, etc...

 

[marineengineer]

At work we have used devcon but have moved to a ceramic composite product call encon. Purchasing likes it because its cheaper but i like the much longer shelf life and use-ability it offers in the shop. Pretty simple to use and they have all different kinda of repair products and i wouldnt hesitate to use any of them the hardest part i jave had is choosing which one to use in which application.

http://www.enecon.com/products/

 

[PWC Repair]

I made a cone once with a cut up soda can. Place over the splines and tap the sprocket on home. Tightens everything up nicely.

 

[MatBirch]

I made a cone once with a cut up soda can. Place over the splines and tap the sprocket on home. Tightens everything up nicely.

Care to elaborate? you ultimately just smashed the thin aluminum between the sprocket and shaft? galvanic corrosion?
I like the idea! especially if I can use a beer can!

 

[PWC Repair]

Yep, smashed the aluminum in between the parts. If I remember correctly I was trying to get a cement mixer into working order. I might have even only wrapped the can piece halfway around cause of how tight it got, been years ago.

 

[matt_i]

The fact that the splines are usually case hardened means to me any epoxy substance put in there is going to come out as dust or sand in short order. I respect the epoxy but this is not a place it has a chance, if its loaded like I think in my mind. If anything I'd use carbon steel shim stock. Start with .010".

 

[senlow]

No epoxy or similar will repair worn splines. You say "downtime is a killer". Fix the **** right and be done with it.

 

[steel 35]

I like the idea! especially if I can use a beer can!

Better get five spares

 

[Z2V]

I have used this with good results

 

[pcmeiners]

"The fact that the splines are usually case hardened means to me any epoxy substance put in there is going to come out as dust or sand in short order."
Agree, epoxy is not meant for gear/spline surfaces.

 

[My Old Tools]

Take it to a good machine shop. They should be able to build up the splines by welding and recut them.

 

[Chief919]

We use a product called Belzona at work, not cheap though, over $300 for the belzona 1111 in the 1kg package we use

http://www.belzona.com/en/products/1000/1111.aspx

Belzona is good stuff. I patched a hole in a Cat 3406 block in Afghanistan to keep a dozer running for 5 weeks while we waited on a new engine. Probably put 250 hours on it with no issues.

 

[metalmagpie]

Get it professionally welded and then have the splines recut. Or buy a replacement shaft.