Stihl Rapid Super chainsaw chain 33RS72 — 3/8" pitch, .050 gauge, 72-link for 20" bar

STIHL 33RS72 Rapid Super is a high-speed, full‑chisel chainsaw chain built for powerful saws and aggressive cutting tasks.

This Rapid Super (RS) chain delivers razor-edged square-corner cutters that minimize friction and slice cleanly through hard or frozen wood. Its cutter and tie-strap geometry reduce vibration while keeping the aggressive cutting profile that professional forestry and industrial users depend on. The RS design favors speed and plunge-cut performance, but it needs careful sharpening and maintenance to preserve top cutting efficiency.

How does the STIHL 33RS72 improve cutting speed and efficiency?

The square-corner, full‑chisel cutter shape of the Rapid Super chain reduces nose and side friction, enabling faster feed rates and cleaner kerfs in dense timber. The low-vibration cutter/tie-strap layout keeps operator fatigue down while maintaining aggressive bite for rapid cutting.

• 3/8-inch pitch and 0.050-inch gauge for tight, fast cutting action
• Razor-edged cutters designed for minimal chain friction
• Reduced vibration geometry for steadier cuts and less operator strain
• Optimized for plunge cuts and through-fiber sawing in hardwood

Will this chain fit my saw and bar?

The 33RS72 fits chainsaws that accept 3/8" pitch chains with a 0.050" gauge and a 20‑inch guide bar, and it contains 72 drive links. Confirm your saw’s pitch, gauge and required drive link count before ordering to ensure compatibility.

• 3/8" pitch — check your saw’s sprocket and replacement specs
• 0.050" gauge — matches bars and tensioning systems designed for this gauge
• 72 drive links — specific length for 20" guide bar compatibility
• Suitable for higher-powered chainsaws and professional-use bars

What maintenance and sharpening practices keep RS chains performing?

RS full‑chisel cutters are fast but unforgiving when dull; regular, precise sharpening preserves cutting speed and reduces strain on the powerhead. Use a properly sized round file, maintain original cutter angles, and inspect tie straps and rivets for wear to avoid performance loss.

• Sharpen with the correct diameter round file and guide for 3/8" pitch cutters
• Maintain cutter top-plate and side-plate angles to factory specs
• Check and replace worn rivets, drive links, or tie straps promptly
• Use recommended lubrication and keep the bar groove and oil ports clean

Is the STIHL RS chain safe for general use around the property?

RS chains are engineered for high-speed, professional cutting and are more aggressive than reduced-kickback models; they require an experienced operator and careful handling. STIHL recommends using reduced-kickback, green-labeled chain and bars on general-purpose or consumer saws to lower kickback risk.

• RS chain is intended for trained professionals in forestry and industrial settings
• Not the preferred choice for casual or infrequent homeowners
• Follow all manufacturer safety procedures, PPE and saw operating instructions
• Consider green-labeled reduced-kickback options for general-purpose work

Who is this for? The STIHL 33RS72 Rapid Super chain is aimed at professional cutters and heavy-duty users who run higher-powered chainsaws and need exceptionally fast, clean cutting in demanding environments like felling, bucking and limbing. If you prioritize maximum cutting speed and plunge-cut capability and you maintain your equipment meticulously, this chain delivers high performance; casual users or those seeking lower kickback should choose a reduced‑kickback alternative.