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Old 04 January 2013, 14:48   #1
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Drawbar Material 60mm box ???

Hi, I'm looking to extend a trailer drawbar by replacing the drawbar with 60mm box steel and then bolting on a hitch that fits over 60mm.

I have a steel supplier close to me but not sure what to ask for and what thickness e.g. type of steel and wall thickness.

Any ideas?
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Old 04 January 2013, 15:01   #2
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60 x 60 x thickness (prob 5mm) x [length you need] RHS (Rectangular hollow Section)
All dimensions to be external.
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Old 04 January 2013, 15:03   #3
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Thanks, is it mild steel?
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Old 04 January 2013, 15:06   #4
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I'd have a go with 3/16" gauge ( wall thickness ) and galvanised. The 60mm box you already know. 1/8 is a bit wafer like and 4/16 you're obviously going to be a 1/4 inch thick. Go bigger than smaller but 3/16 gauge is the one to aim for.
Hope that helps. Take your trailer to your supplier, they'll tell you straight away anyway. And get you the right U-bolts too.......and those have to be stainless, the pain in removing corroded U-bolts is not worth the hassle should you wish to adjust and tinker.
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Old 04 January 2013, 15:09   #5
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The 60mm box will slide into a bigger box section and then bolt through so I guess I will need M10 HT bolts ?
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Old 04 January 2013, 15:12   #6
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Got a photo?
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Old 04 January 2013, 15:14   #7
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Quote:
Originally Posted by whisper View Post
The 60mm box will slide into a bigger box section and then bolt through so I guess I will need M10 HT bolts ?
M12
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Old 04 January 2013, 15:14   #8
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Yes and stainless........if it's a sliding fit then may I suggest that you do two vertical and two horizontal alternatively.
That will stop it sniping or hinging. Maybe even a 4cm wide 1mm thick nylon strip onto each flat to take up any slack?
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Old 04 January 2013, 15:17   #9
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I need to unbolt the tractor hitch extend the drawbar with the 60mm box which will fit inside the other box section.
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Old 04 January 2013, 15:18   #10
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Yes and stainless........if it's a sliding fit then may I suggest that you do two vertical and two horizontal alternatively.
That will stop it sniping or hinging. Maybe even a 4cm wide 1mm thick nylon strip onto each flat to take up any slack?
Give the steel a bit of a 'touch' at the bolt holes with a sledge to close up any 'slack' in the sleeving. Or you could squeeze it in a vice.
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