Home > Knowledge > Content

When digging post holes, how wide should each hole be?

- Feb 24, 2018 -

When digging post holes, how wide should each hole be? If a specific depth is helpful, suppose the holes need to be 750mm (30 inches) deep. If relevant, the posts are 100mm (4 inches) by 130mm (5 inches).


If you're going to be using concrete to surround your post, then 12 inches (300mm roughly) is an ideal width. 

Post hole digging is easiest when using an Auger Drive (Post Hole Borer) powered by an earthmoving / agricultural machine - these include skid steer loaders, mini loaders, tractor loaders, telehandlers and excavators.


Depending on the type of ground you're drilling into, you will need to select the correct auger to suit your application: 

  • Rock Augers: Recommended for drilling through solid ground (not recommended for clay)

  • Tungsten Augers: Recommended for drilling through clay and rocky ground


Earth Augers are also available but are far more limited in their suitability to different ground types.

The size and hydraulic oil flow of the machine will determine the model of Auger Drive you require.


Related Industry Knowledge

Related Products

  • 58cc 22 Inch Steel Chainsaw
  • Showbull Steel Gasoline Chain Saw
  • Craftsman Petrol Chainsaw
  • Mobile Petrol Brush Cutter
  • Craftsman Gas Hedge Trimmer
  • Small Oregon Chainsaw with 25cc