OZ Drive Nut Breakout Torque Range

OZ Drive Nut

Breakout Torque Range

 

Indicating Colour for Torque RangeTypical Break-Out Torque Range
Silver (S)190 - 230Nm140 - 170ft lbs
Orange (O)135 - 190Nm100 - 140ft lbs
Red (R)100 - 155Nm75 - 115ft lbs
Yellow (Y)80 - 110Nm60 - 80ft lbs
Purple (P)40 - 50Nm25 - 35ft lb

The appropriate colour symbol is stamped into each nut disc to
indicate the nut torque/colour range setting. e.g. R = Red; P = Purple etc.

General Features

DSI's Mining Products Division have continued to develop torque resistance nuts which provide greater benefits over and above the hot forged mixing square, enabling the use of a single spanner operation in installation of chemical rock bolts. Similarly, there has been a continued quest to improve earlier versions of Drive Nuts.
DSI Arnall’s OZ Nuts stand out in offering the following:

 

  • No residual drag from the torque resistant device, hence ability to gain a greater pre-tension of the bolt.
  • Less strain on operators using hand held roof bolters due to a smooth break-out mode.

 

The OZ Nut is available to suit the majority of DSI rock bolts including Flexibolts, Threadbar and Universal Bolts.

 

  • Corrosion protection can be provided by zinc plating to AS 1789-1984.
  • Australian Patent Number 647259 is applicable to DSI Arnall OZ Nut.

 

Notes

  • DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.