The Original Trencher Made in New Zealand

Kit for GeoTrencher GR20 to fit Stihl TS420 / 500

Kit to make GeoTrencher 20". Requires assembly


This listing is for a kit only option to transform a Stihl TS420 or a TS500 power cutter into a trencher.

Once assembled, this GeoTrencher will cut a clean trench in any type of ground: clay, sand, wet, frozen, ... up to 20" deep and 1.5" wide*

Ideal for all sort of applications like laying cables, pipes, irrigation, fencing, fiber optic, root pruning, ..... GeoTrencher will save you time and money. GeoTrenchers are safe and easy to use with many satisfied customers, private and businesses, around the world.

You will receive in the box: 

  • the GeoTrencher attachement for the Stihl TS420 or TS500 for self assembly
  • a 20" bar with a box of two standards 1.5" wide 
  • a service tool, full assembly instructions and operation manual
  • a spare bearing for the bar end sprocket

Will only fit the Stihl TS420 or TS500 cut off saw, engine not included in this listing. For a ready made GeoTrencher check out our other listings on eBay

  • Initial assembly time approximately 30mns
  • Maximum digging depth of 20"
  • Assembly can be reversed back to the original power cutter
  • Supplied with 2 self-sharpening, heavy-duty standard chains 1.5" wide
  • Will only fit the Stihl TS420 or TS500 models