building up a shaft

snipe

Member

Location

west yorkshire

• Oct 1, 2023

• #1

has anyone built up a shaft with epoxy successfully. its the support bearing on a trailed power harrow half way down the draw bar. The bearing is only slighty loose on the shaft, only needs building up 1mm. The bearing only carrys the weight of the shaft but will have 230hp going down it

 

Down and Dirty

Member

Arable Farmer

• Oct 1, 2023

• #2

Perhaps instead of epoxy Sika Sikaflex 221 Adhesive Sealant, Black, 300 ml would do the job better as it can flex slightly?
used it a few years ago on my old discovery center prop carrier did the job nicely

 

3

335d

Member

• Oct 1, 2023

• #3

I would use something like Loctite 660. Depends if you mean 1mm on the diameter, or radius. I think 660 is for gaps up to 0.5mm.

LOCTITE® 660

LOCTITE 660 is a high strength retaining compound with good gap filling properties, ideal for repairing worn-out seats, keys, splines, bearings or tapers without remachining.

www.henkel-adhesives.com

 

O

Old apprentice

Member

Arable Farmer

• Oct 1, 2023

• #4

I got two front axle shafts spray welded as new were obsolete as good as new.

 

Countryboy

Member

Livestock Farmer

Location

Pembrokeshire

• Oct 1, 2023

• #5

One technique that might be suitable would be to centre punch the entire area of the shaft where the bearing sits (hundreds of indents as close as possible to each other), completely clean off the entire area with a solvent cleaner and fit bearing with loctite bearing fit.

 

rob h

Member

Location

east yorkshire

• Oct 1, 2023

• #6

Shim it with abit of thin metal. Drinks cans work well or if you need thicker use food can .clean up well and put shaft retainer on as well.

 

snipe

Member

Location

west yorkshire

• Oct 1, 2023

• #7

Thanks everyone some good ideas

 

Nearly

Member

Location

North of York

• Oct 1, 2023

• #8

Dave at Addingford Engineering at Thornes will build it up and machine it back.

 

ACEngineering

Member

Location

Oxon

• Oct 1, 2023

• #9

335d said:

I would use something like Loctite 660. Depends if you mean 1mm on the diameter, or radius. I think 660 is for gaps up to 0.5mm.

LOCTITE® 660

LOCTITE 660 is a high strength retaining compound with good gap filling properties, ideal for repairing worn-out seats, keys, splines, bearings or tapers without remachining.

www.henkel-adhesives.com

Click to expand...

ive never had any success with this stuff, it just dont go off in a gap. it might work with loctite activator though to make is set regardless of the gap, i never tried that way before.

 

A

Alchad

Member

• Oct 1, 2023

• #10

Could you use a “Speedi-sleeve”

Bearingboys

Online

www.bearingboys.co.uk

 

snipe

Member

Location

west yorkshire

• Oct 1, 2023

• #11

Alchad said:

Could you use a “Speedi-sleeve”

Bearingboys

Online

www.bearingboys.co.uk

Click to expand...

Can’t get one on as the shaft is not worn at the end just where the bearing sits

 

Will 1594

Member

Mixed Farmer

Location

Other side of the river to sandringham

• Oct 1, 2023

• #12

snipe said:

Can’t get one on as the shaft is not worn at the end just where the bearing sits

Click to expand...

Machine shop ,get it welded , and turned back down , be simple job for some of them ,
ever watched cutting edge engineering

 

R

R&D

Member

• Oct 1, 2023

• #13

Will 1594 said:

Machine shop ,get it welded , and turned back down , be simple job for some of them ,
ever watched cutting edge engineering

Click to expand...

We had this done on a main drive shaft on the back of a Claas combine header, it lasted a little while then snapped in half where it had been built up. Couldn’t believe it, thought it would be fine.

 

C

crashbox

Member

Livestock Farmer

• Oct 1, 2023

• #14

snipe said:

has anyone built up a shaft with epoxy successfully. its the support bearing on a trailed power harrow half way down the draw bar. The bearing is only slighty loose on the shaft, only needs building up 1mm. The bearing only carrys the weight of the shaft but will have 230hp going down it

Click to expand...

I have welded up some shafts, including a topper shaft (that was run on too long with a bust bearing) with Arc weld then ground down with a flap disc.

 

A

aidan

Member

Location

Ireland

• Oct 1, 2023

• #15

R&D said:

We had this done on a main drive shaft on the back of a Claas combine header, it lasted a little while then snapped in half where it had been built up. Couldn’t believe it, thought it would be fine.

Click to expand...

probably got bent with the heat of welding

 

M

mo!

Member

Mixed Farmer

Location

York

• Oct 1, 2023

• #16

The proper stuff is called Belzona, but it's very expensive. Weld and turn back is a better way forward. Snowball Engineering has some UK based (Yorkshire) videos when he repairs a roller shaft. You never regret doing a job properly.

 

davidroberts30

Member

Location

pembrokeshire

• Oct 1, 2023

• #17

aidan said:

probably got bent with the heat of welding

Click to expand...

And too much heat

 

Sharpy

Member

Livestock Farmer

Location

Ardrossan Ayrshire

• Oct 1, 2023

• #18

snipe said:

Can’t get one on as the shaft is not worn at the end just where the bearing sits

Click to expand...

Can you not just move the bearing along the shaft a couple of inches to unworn metal?

 

P

Pistonbroke

Member

• Oct 1, 2023

• #19

snipe said:

Can’t get one on as the shaft is not worn at the end just where the bearing sits

Click to expand...

Put a cut through one side of the spacer

 

O

Old apprentice

Member

Arable Farmer

• Oct 1, 2023

• #20

Welding with stick is fare hotter than spray welding it is far better than stick for shafts.