"Welding" steel to steel - table slide mechanism. (1 Viewer)

[namwaldog]

On our Burstner MH there is a sliding table mechanism...

The slide is controlled in either direction by a large screw handle that threads into a boss that is secured to the table mount.

One of these bosses must have come adrift in the past and has been repaired by firstly a crude attempt to arc weld and then by an epoxy type material "glueing " it on but this has come adrift also.

I have cleaned away all the epoxy resin and the weld spots to find that the boss is let into the steel channel by a slightly smaller diameter being turned on it to form a shoulder that locates into the hole pre-formed in the channel.

What I am seeking advice on is the best way of securing the boss back on to the channel. It looks like the arc weld has been quite heavy handed and eroded a small section of the boss so I am presuming that welding isn't the solution. Is there a "best" steel to steel epoxy resin type of adhesive that would secure the boss in place?
Of course it has to be added that overtightening of the screw handle will probably have the effect of pressing the boss back out of the channel so we will have to learn to be a little lighter handed whilst securing the table.

Thanks.

 

[hilldweller]

If both are steel any MIG welder will do it in seconds.

 

[Lofty1]

I think quiksteel is about the best I have used slow drying but solid

^{_{Subscribers  do not see these advertisements}}

 

[Silver-Fox]

The boss looks a bit mangled to me.

Could you get a nut with the correct thread then weld that to a penny washer. then weld that to the table arm.

Or get a friendly engineer to turn you a new boss then weld that to the arm.

 

[Hils and Glenns]

We had this happen on the mechanism on our hymer table. Oddly enough we just got round to getting it fixed a couple of weeks ago having tried various glues to no avail. We took it to a brazier who welded it with brass. Looks like a good fix.

 

[olley]

Mig, Braze or diy with silver solder, not soft solder.

^{_{Subscribers  do not see these advertisements}}

 

[tedontour]

We had this happen on the mechanism on our hymer table. Oddly enough we just got round to getting it fixed a couple of weeks ago having tried various glues to no avail. We took it to a brazier who welded it with brass. Looks like a good fix.

as hilldweller said mig then heli-coil thread job done
sorry that was ment for namwaldog

 

[namwaldog]

@Hils and Glenns I had considered brazing but sort of dismissed it because of the high prolonged temperatures involved and thinking that this might warp or otherwise damage the steel section, I am presuming that your repair wasn't affected in this way?

 

[ChrisL]

As an ex coded welder i would TIG weld it, which will make a nice neat job of it. But brazing will also do a nice job if the person doing it is competent. MIG will work also, but wont be so neat. IMO.

^{_{Subscribers  do not see these advertisements}}

 

[MitchandJenny]

Braze will be best ..
Mitch.

 

[Enword]

Tig is the way forward for that bit far from me though

 

[soreeyes]

I think I would try putting a magnet on it to check if it is steel as it could be a alloy . If steel and plated it will need possibly the plating cleaned to get a clean weld .

Any fabrication company or engineering companies that can do it for a drink for a five minute job .

^{_{Subscribers  do not see these advertisements}}

 

[ChrisL]

There's a disscusion on the following link re brazing v tig welding and a nice little video of some quality brazing by a very skilled operator, as i said, either will do a good job but you might find it easier to find a skilled tig welder.

 

[Hils and Glenns]

@Hils and Glenns I had considered brazing but sort of dismissed it because of the high prolonged temperatures involved and thinking that this might warp or otherwise damage the steel section, I am presuming that your repair wasn't affected in this way?

We were worried that the rubber bits might get burnt but the bloke did a good job. We had both of the screw in clamps done and he charged £20. Think you need specialist equipment to weld with brass.
The table top is back on and it all works well. We took it here http://ripon-wroughtiron.co.uk/

 

[MitchandJenny]

Welding with Brass is "Brazing" and can be used to join dissimilar metals.
Oxy acetylene torch and a brazing rod, either pre-fluxed or with a tin of flux and the job's a goodun.
Glad you got it sorted.
Mitch.

^{_{Subscribers  do not see these advertisements}}

 

[jockaneezer]

Take it to Malcolm Foster, just up the road from you at Roe Foot Farm, Sowerby Row and he'll sort it for you, tell him Graeme sent you.

 

[GWAYGWAY]

I welded the leg to the table base on my new van, I removed 2" from the support tube as the table was miles too high for a shorty like me to eat from.
I used my tig welder and variable current on DC made a nice job even though it is cheap mild steel tubing and the base , similar square section. The bit you have was probably just peened over and came loose by excessive tightening. Ti is the bets for that job as you can concentrate on the heavy section and then run down to the thin section to flow it together. Get someone to do it that is reasonably skillful would take a few minutes to do it.

 

[WSandME]

That looks remarkably similar to the bosses under the table in my Hymer.

Before you start welding or epoxying...

When I picked my Hymer up from Lowdhams, I noticed one of the screw-downs was missing. I approached Lowdhams parts guy (I can find his name if needed) and he arranged for a replacement to be sent from Hymer. It consisted of the handle part as seen in the second photo, which is actually threaded, plus a very thin nut, plus - and here's the important bit - a very thin spanner to hold the very thin nut in place between the sliding pieces so you can tighten the boss down. Worked for me!!

^{_{Subscribers  do not see these advertisements}}

 

[jockaneezer]

Take it to Malcolm Foster, just up the road from you at Roe Foot Farm, Sowerby Row and he'll sort it for you, tell him Graeme sent you.

I forgot to mention, he runs a fabrication and welding business from his dad's farm so you'd be in safe hands, cos as everyone knows, a farmer's welding is best avoided.

 

[Two on Tour]

I forgot to mention, he runs a fabrication and welding business from his dad's farm so you'd be in safe hands, cos as everyone knows, a farmer's welding is best avoided.
View attachment 177535

I take it that that's farmer's welding then ?

 

[Richard n Ann]

I take it that that's farmer's welding then ?

Know as a pigeon shit weld lol

^{_{Subscribers  do not see these advertisements}}

 

[Enword]

I forgot to mention, he runs a fabrication and welding business from his dad's farm so you'd be in safe hands, cos as everyone knows, a farmer's welding is best avoided.
View attachment 177535

Oh thats grim