581643672 - 18" Chain SP33G .325 .050 72DL-18"

The Husqvarna SP33G 18" Chainsaw Chain (Part #: 581643672) is a genuine OEM X-Cut® chain designed for precision cutting, low vibration, and long-lasting sharpness. With a .325" pitch, .050" gauge, and 72 drive links (72DL), this high-performance chain is optimized for both professional and homeowner chainsaws using 18" bars.

Part of Husqvarna’s advanced X-Cut® series, the SP33G chain is pre-stretched at the factory to reduce break-in time and maintain tension longer. Its efficient cutter design provides smooth operation, faster cuts, and reduced wear—ideal for limbing, felling, and firewood processing.

Compatible Equipment Examples:

• Husqvarna 450 Rancher with 18" bar

• Husqvarna 445, 440, 545, and 550XP (with matching bar specs)

• Fits any chainsaw requiring an 18" bar with .325" pitch, .050" gauge, and 72DL chain

• Also compatible with select Poulan Pro, Jonsered, and Echo models

Features:

• Genuine Husqvarna SP33G X-Cut® Chain

• Part #: 581643672

• .325" pitch | .050" gauge | 72 drive links

• Length: 18 inches

• Low-vibration design for user comfort and control

• Pre-stretched for reduced adjustments during break-in

• High-performance steel holds sharpness longer

• Engineered for fast, clean cutting in hardwood and softwood

Bee Green in Oakland is your trusted Husqvarna dealer, proudly serving the Bay Area with premium OEM chains, guide bars, and expert chainsaw support for professionals and homeowners alike.