Ideas on how to make the right size Box section for draw bar

[snipe]

Wanting to make a telescopic drawbar for the header trailer. I need a piece of box section 187x135 8 or 10 mm thick. It could be a little bit small. Can’t find any near that size. Best idea so far is 2 lengths of C section 180 x 75, trim one Down to 180 x 60 and weld them together.

 

[David.]

Claas trolley has drawbar extension piece sliding either above or below the fixed section, and with a couple of fabricated sleeves (sized to be a sliding fit) welded onto one half, effectively banding them together but allowing the assembly to telescope when required. A bolt through one sleeve, and the drawbar section, locks it in required position.
The problem with making a full telescopic bar will be danger of it seizing if drawbar bends even slightly.
If you want a pic of arrangement I described, I can.

 

[Andrew]

Wanting to make a telescopic drawbar for the header trailer. I need a piece of box section 187x135 8 or 10 mm thick. It could be a little bit small. Can’t find any near that size. Best idea so far is 2 lengths of C section 180 x 75, trim one Down to 180 x 60 and weld them together.

Just get some plate bent into a C shape yhe correct size, and a weld a bit of flat on to make a box.

 

[snipe]

Claas trolley has drawbar extension piece sliding either above or below the fixed section, and with a couple of fabricated sleeves (sized to be a sliding fit) welded onto one half, effectively banding them together but allowing the assembly to telescope when required. A bolt through one sleeve, and the drawbar section, locks it in required position.
The problem with making a full telescopic bar will be danger of it seizing if drawbar bends even slightly.
If you want a pic of arrangement I described, I can.

Could I have some pictures please. It is a claas trailer, but it’s a fully welded drawbar.

 

[Sals dad]

If you can find a box section 10 mm smaller then weld some thin strips of 5mm length ways it will be less likely to seize up , don’t need strips the full length could be short lengths every 1/2 meter or so , could use any size strip depending upon the size box you can find / make .

 

[snipe]

If you can find a box section 10 mm smaller then weld some thin strips of 5mm length ways it will be less likely to seize up , don’t need strips the full length could be short lengths every 1/2 meter or so , could use any size strip depending upon the size box you can find / make .

Nearest piece I could find so far are 150 or 200 mm.

 

[Sals dad]

Nearest piece I could find so far are 150 or 200 mm.

You can get 120 x80 box , 2 pieces side by side plus some strip wouldn’t be a mile away or get 2 c section folded so one fits inside the other to make a box would be strong

 

[PuG]

What about using nylon slide blocks to take up the difference in size?

 

[David.]

Yes I will get them.
Mine is 15/17ft trailer for Dominator, maybe not appropriate or strong enough if you are talking about big Lexion header.

 

[homefarm]

I think our header trailer had a thick plate welded over the end of the large box with a hole cut in it to match the smaller sliding box section.
The sliding box was possibly 20mm smaller. I presume it had a block welded on the internal end to fit the external box and still had about 3 metres of the smaller box inside when fully extended.

It slid in and out easily with one pin just behind the end plate for the different lengths.

 

[David.]

Dominator lightweight trolley.

 

[spanners and hammers]

drill and tap bolts on the internal box to take up some of the slack ( we do this for our telescopic legs works a treat we glav them as well )

 

[snipe]

I can’t go much smaller as it will loose too much Strength

 

[homefarm]

Mekanag Header Trailer | Shelbourne Reynolds

The Shelbourne range of combine header trailers are designed to safely, simply and securely transport most popular combine headers – John Deere, New Holland, Case, Claas & Massey Ferguson.

www.shelbourne.com

I think ours was a mekanag trailer now shelbourne I think you can see the difference in size in the link above, perhaps they use thicker walls in the smaller section.

 

[snipe]

Dominator lightweight trolley.

Thanks for the pictures,