Usage


Felling using the bumper spike

The bumper spike acts as a pivot between the engine body and guide bar.

Apply the bumper spike’s lower tip at the intended hinge width. Press with your left hand against the front handle while lifting the rear handle with your right hand. Saw with a pulling chain until you have achieved the appropriate hinge width. The hinge must have a uniform thickness. Do not forget to insert the felling wedge into the saw cut after you have sawn just over half of the diameter.

You can also saw from the opposite direction using a pushing chain and apply the upper tip of the bumper spike. Sawing usually becomes more irregular and the engine resistance is greater.

Related articles

  • 570
    Usage

    How to use a chainsaw in cold weather

    Working with chainsaws during winter can be challenging. Here are some tips on what you can do to stay safe and productive when it gets cold outside.

  • Working with chainsaws part 1
    Usage

    Limbing thick branches

    A different work technique is used for limbing thick branches than that used for thin branches. This applies to leaf trees and other trees with thick, extensive branches. The working technique often matches the technique used for crosscutting. In order to avoid splitting and the guide bar pinching, it is important that you use the correct technique and sequence.

  • Working with chainsaws part 1
    Usage

    Crosscutting

    Consider the crosscutting carefully, especially for larger logs. An incorrect work technique can be dangerous and cause the trunk to split or the guide bar to become pinched. First assess the tension in the trunk. Make it a habit to look at how the trunk reacts to being cut. You may have misjudged the tension.