DeWalt 18V Pole Saw Compared Against Ryobi ONE Plus for High Limbs

Reach sets the first limit

Start with the limb height, then look at the saw. The Ryobi RPP182020 extends to roughly 2.7 metres of shaft, which gives an average operator a working height near 4 metres before wrist and shoulder position becomes awkward. The DeWalt DCM575 is a fixed-length tool at around 3 metres overall, so the bar usually sits lower unless you move into DeWalt’s separate attachment-capable heads.

That reach difference changes the job before the motor starts. If the bar cannot be placed on the limb from the ground, cutting speed and chain quality have no practical value for that cut. Anyone clearing branches above 4 metres should add the cost of a proper telescopic head or extension pole before assuming either base tool covers the garden.

Reach also changes how weight feels. The Ryobi is about 4.3 kg with a 4.0Ah pack fitted, and that weight sits at the far end of an extended pole. The leverage makes the saw feel heavier than the scale number suggests. A cut held at full extension for more than 30 seconds is where forearm fatigue starts to pull the bar off line. The DeWalt carries more weight at the head, yet the shorter lever arm can make it less punishing in use.

What the chain does in green wood

The DeWalt DCM575 uses a brushless motor with a 20 cm, 8 inch Oregon bar. Under load, it keeps chain speed better than the brushed motor in the standard Ryobi RPP182020. In a 10 cm green sycamore limb, the DeWalt clears the cut faster and resists bogging when feed pressure increases. The Ryobi still completes the work, though live wood beyond 8 cm asks for a lighter touch to keep the bar turning.

Both tools share a pole-saw weakness around chain tension. The bar nose is far from your hands, so a loose chain can throw itself off more readily than it would on a handheld saw. The DeWalt uses a tensioning setup that requires a tool. The Ryobi has a side-access adjuster, which is quicker to reach, though it can drift looser over a long session.

Both use 3/8 low-profile chain. Replacement loops are inexpensive and commonly stocked. Bar oil matters more than many buyers expect: a dry bar in green wood glazes the cutters quickly, and once the chain is glazed, a short cut can turn into a long grind of smoke and dust.

Battery platform decides many purchases

For people already using Ryobi ONE Plus tools, the RPP182020 takes the same 18V batteries used across a line of more than 280 tools. A spare 4.0Ah pack bought for a hedge trimmer drops straight in. DeWalt’s 18V XR line is also broad, though the packs do not interchange with Ryobi, so the purchase may have been shaped by earlier tool choices.

Runtime under real cutting load is shorter than marketing figures suggest for both saws. A 4.0Ah Ryobi pack can handle a moderate pruning session of perhaps 20 to 30 cuts in soft green wood before needing a swap, with cold weather reducing that number. The DeWalt’s brushless motor uses charge more efficiently, so a comparable 4.0Ah XR pack generally lasts longer on the same wood. These tools suit an afternoon of overhead pruning followed by overnight charging, not a full day of felling.

A 12 cm oak limb over a fence

Take one awkward cut: a horizontal oak limb, 12 cm thick, sitting 3.5 metres up over a fence you want to keep clear of falling timber.

With the Ryobi at its full 2.7 metre extension, an average-height operator can put the bar roughly at limb height with arms raised. The posture is already close to the limit for clean control, because every small movement at the hands is magnified at the bar.

The first cut should be an undercut about a third of the way through. That undercut helps stop bark from tearing back along the trunk when the limb drops. On 12 cm oak, the Ryobi’s brushed motor slows during this first cut, so feed pressure has to stay light.

The top cut then comes down to meet the undercut. With a sharp chain, actual cutting time is around 40 to 60 seconds, plus the time needed to reposition and steady the pole. That time stretches quickly if the chain has dulled or the operator lets the bar nose wander.

With the DeWalt, reach is the first problem on this same limb. The shorter tool may fail to put the bar onto wood at 3.5 metres unless an extension head is involved. Where it does reach, the brushless motor keeps chain speed up through the undercut and finishes the same work faster.

At that height, shoulders become part of the cutting performance. A saw with more torque still needs a steady bar, and the operator has to keep the pole from bouncing as the teeth bite into oak.

Price spread

Bare-tool pricing usually puts the Ryobi RPP182020 below the DeWalt DCM575. The gap grows once kits with a battery and charger are included, making the Ryobi kit the cheaper entry point for someone starting without either platform.

Maintenance the sale page skips

Pole-saw chains dull quickly because aiming at height makes it easy to touch the nose to bark, soil, or grit caught in old branch crotches. A 4.5 mm round file in the shed restores a 3/8 chain in a few minutes. The Oregon chains used here take the same file, so sharpening kit does not favour either brand.

Each saw uses an automatic oiler with a small reservoir. On the Ryobi especially, oil flow can clog if the saw sits through winter with old oil in the line. Draining the reservoir, or running it dry for the last cut of the season, reduces that storage problem.

Chain off-throw at the bar nose is the common pole-saw failure. The cause is usually a chain sitting a few millimetres too loose. A tension check every fourth or fifth cut prevents more downtime than most spare parts can fix after the chain has already come off.

Noise, vibration, and how long the session lasts

Both saws are quieter than petrol pole saws, which matters when pruning near a neighbour’s garden on a weekend morning. Cordless saws sit low enough on the noise scale that ear protection remains advisable; petrol machines demand stricter attention. The sound difference is obvious, although vibration through a long shaft becomes the more tiring sensation during extended overhead work.

The buzz travels from the bar along the pole into both hands. After 15 minutes of continuous cutting above shoulder height, that vibration can bring a session to a halt even with charge left in the pack. The DeWalt’s brushless drive runs a little smoother under load, which can mean less hand numbness after a backlog of cuts. The Ryobi’s brushed motor sends a coarser buzz up the shaft. If an existing wrist problem is part of the purchase, the smoother running tool deserves weight in the choice. The awkward measurement left outside both spec sheets is the height at which a steady shoulder position turns into a shaky reach.