Best Pruning Saw for Thick Branches: A Complete Beginner's Guide

There comes a point in every gardener's pruning journey when the branch in front of them is simply too large for loppers. The handles flex, the blades bind, and no amount of effort produces a clean cut. This is the moment to reach for a pruning saw — a tool specifically designed for cutting living wood efficiently and cleanly, even on branches that would defeat any other hand tool.

This guide covers everything a beginner needs to know about pruning saws: when to use one, the different types available, how to make safe and effective cuts on thick branches, and how to maintain your saw so it lasts for years.

When a Saw is Necessary

As a general rule, a pruning saw becomes necessary when a branch exceeds about 4–5 cm in diameter. At this size, loppers require so much force that they risk crushing the branch rather than cutting it cleanly — and the resulting wound is slow to heal. A pruning saw, used correctly, produces a smooth, flat cut surface that heals far more efficiently.

Pruning saws are also the right tool when you need to remove a branch flush with a trunk or large limb, where the geometry makes it impossible to position loppers correctly. The narrow blade of a pruning saw can be angled precisely to follow the branch collar, making the correct cut in situations where no other tool could reach.

Types of Pruning Saws

Pruning saws come in several configurations, each suited to different tasks:

• Folding pruning saws: The most popular choice for homeowners. The blade folds into the handle for safe storage and locks open securely during use. Ideal for branches up to about 15 cm in diameter. Compact, portable, and easy to use.
• Fixed-blade pruning saws: Have a rigid blade that does not fold, usually stored in a separate scabbard. Tend to be more robust than folding saws and are preferred by professional arborists for heavy-duty work.
• Bow saws: Have a large, curved frame that holds a long, replaceable blade under tension. Very fast cutting action but bulky and less manoeuvrable in tight spaces. Best for large-diameter branches in open situations.
• Pole pruning saws: Have an extended handle — either fixed or telescoping — that allows you to cut branches overhead without a ladder. The cutting head is usually a short, curved saw blade. Essential for any overhead work.

How to Safely Cut Thick Branches

Cutting a thick branch with a pruning saw requires more planning than a simple snip with hand pruners. The main risk is that the branch will tear as it falls, stripping a long wound of bark down the trunk — a serious injury to the tree that can take years to heal and may never fully close.

The solution is the three-cut method, which is the standard technique used by professional arborists for removing any branch that is heavy enough to tear under its own weight:

1. 1.Undercut: Make the first cut on the underside of the branch, about 30–45 cm from the trunk. Cut upward about one-third of the way through the branch. This undercut prevents the bark from tearing when the branch falls.
2. 2.Top cut: Make the second cut on the top of the branch, about 5 cm further out from the undercut. Cut downward until the branch falls. The undercut will cause the branch to snap cleanly rather than tearing.
3. 3.Final cut: With the weight of the branch removed, make the final cut just outside the branch collar. This is a much easier and more precise cut to make without the weight of the branch pulling on the saw.

Always position yourself to the side of the branch, never directly below it. Wear safety glasses to protect against sawdust and small debris, and consider wearing a hard hat for any overhead work.

Maintaining Your Pruning Saw

A well-maintained pruning saw will last for many years and continue to make clean, efficient cuts throughout its life. The key maintenance tasks are cleaning, drying, and occasional blade replacement.

• Clean after every use: Wipe the blade with a damp cloth to remove sap and wood debris. Sap left on the blade will harden and cause the blade to bind in future cuts.
• Dry thoroughly before storing: Moisture causes rust, which dulls the blade and can eventually cause it to fail. Dry the blade completely before folding or sheathing.
• Apply a light oil coating: A thin coat of tool oil or WD-40 on the blade prevents rust during storage, especially over winter.
• Replace the blade when it becomes dull: Most modern pruning saws have impulse-hardened teeth that cannot be resharpened — when they become dull, the blade should be replaced. Replacement blades are available for most quality saw models.
• Check the locking mechanism: For folding saws, check regularly that the blade locks securely in both the open and closed positions. A blade that closes unexpectedly during use is a serious safety hazard.