Description
STIHL 3639 005 0081 Chainsaw Chain – 20" Bar | 3/8" Pitch | .050" Gauge | 81 Drive Links – 33RS (Rapid Super, Full Chisel)
The STIHL 3639 005 0081 is a high-performance full chisel chain from STIHL’s professional-grade 33RS Rapid Super series. Engineered for maximum cutting speed and power, this chain features a 3/8" pitch, .050" gauge, and 81 drive links, making it a perfect fit for 20-inch guide bars on powerful STIHL chainsaws.
The square-cornered full chisel cutters provide fast, aggressive cutting performance, ideal for clean wood, logging, and firewood production. This chain is built for professional use, offering exceptional efficiency in high-output environments like felling, bucking, and milling.
🔧 Product Specifications:
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OEM Part Number: 3639 005 0081
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Chain Type: 33RS – Rapid Super (Full Chisel)
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Pitch: 3/8"
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Gauge: .050" (1.3 mm)
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Drive Links: 81
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Compatible Bar Length: 20 inches (50 cm)
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Cutter Type: Full chisel – square-cornered for fast, clean cutting
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Kickback Rating: Not low-kickback – recommended for trained/professional users
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Lubrication: STIHL Oilomatic® system for improved performance and longer chain life
✅ Compatible STIHL Chainsaws:
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MS 462, MS 500i, MS 362, MS 400 C-M, MS 391, MS 660, MS 661 C-M
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Any STIHL chainsaw with a 20" bar, 3/8" pitch, .050" gauge, and 81 drive link configuration
⚠️ Not intended for inexperienced users — full chisel chains require skill and proper PPE.
🪓 Best Applications:
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Logging and felling
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Chainsaw milling
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Firewood cutting
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Bucking and large limb removal
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Forestry and professional land clearing
🔁 Comparable Replacements:
If STIHL OEM is unavailable, use:
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Oregon 72LPX081G
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Carlton A1LM081G
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Forester F33-81
(Always confirm pitch, gauge, and drive link count for safe operation.)
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STIHL 33RS Rapid Super 81 drive link
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🛠️ Why Choose STIHL 33RS Chains?
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Fastest cutting STIHL chain for clean wood
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Full chisel teeth for high-speed, aggressive performance
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Oilomatic® system enhances durability and reduces friction
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Trusted OEM quality for perfect fit and reliable operation
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Built for pro users handling large, tough cutting jobs
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