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Topic Date User

SS Coachscrews at Bunnings - Are they ok? 31-Jul-2014 At 4:22:29 PM Jim Titt

Message

On 31/07/2014 mikllaw wrote:
>If it's a bolt, Bubba can shear it, the A2 maximum torque on a 10 mm shaft
>is only 44 Nm, about 20 kg force on a 150 mm shifter.
>
>Cheap nasty stainless ones will shear easier.
>
>if they are glued in, no torque is involved and so long as they have at
>least 30 mm unthreaded shoulder they will be fine.
>
>But if you're using them as a (ground-up) soft rock screw-in anchor, it
>is possible to damage them by over-torquing. I'd use screwbolts as they
>are much stronger (ave strength outwards 27 kN) than stainless coachbolts
>((ave strength outwards 18 kN) , then unscrew them and glue in a machine
>bolt or ring

Anyone can mark A2 or A4 on any product, doesn´t mean it is.

The max torque figures aren´t the failure torque, they are the maximum installation torque. For the M10 316 bolts wedge bolts we supply the torque to shear the threads averages at 117Nm and the installation torque 40Nm.