Husqvarna 13" Chain 581643656 X-cut SP33G .325 .050 56DL 550XP 445 Oem New 581643678

Husqvarna 13" Chain 581643656 X-cut SP33G .325 .050 56DL 550XP 445 Oem New 581643678.

Achieve Razor-Sharp Cutting Speed & Minimal Break-In Stretch: Genuine Husqvarna X-CUT

Eliminate dull cutting teeth, constant chain tension retightening, excessive bar heat, and sluggish cutting speed on your 13" chainsaw. This Genuine Husqvarna Factory OEM 13" X-CUT SP33G Semi-Chisel Chainsaw Chain (Part Number 581643656 / 581 64 36-56) is the authentic high-performance narrow kerf (Pixel) cutting loop engineered, developed, and manufactured directly by Husqvarna in Huskvarna, Sweden. Specifically built for high-demand commercial arborists and firewood cutters, the SP33G chain is designed to maximize engine efficiency and cutting speed on 40cc to 55cc modern saws.

Unlike third-party mass-market chains, the X-CUT SP33G is factory pre-stretched under precision hydraulic load at the Swedish manufacturing plant before packaging. This virtually eliminates initial break-in chain sag, preventing the chain from slapping the bar underside or jumping off the nose sprocket during early cuts. Featuring an engineered semi-chisel cutter profile with a low-vibration, low-kickback bumper drive link design , it stays sharp significantly longer when cutting dirty bark, knotty hardwood, and softwood alike. Its narrow-kerf geometry requires less engine horsepower to pull through the cut, allowing your saw to maintain higher operational RPM and produce clean, rapid severed wood chips.

This authentic factory replacement chain is cataloged under Husqvarna OEM Part Number 581643656 (581 64 36-56 / 5816436-56 / Chain Loop X-CUT SP33G-56DL / .325" .050" 13-Inch) .

Why This Genuine Husqvarna 581643656 X-CUT Chain is the Sawyer's Standard:

100% Genuine Factory OEM Swedish Steel: Engineered and manufactured in Huskvarna, Sweden using proprietary refined high-carbon tool steel.

Factory Pre-Stretched Treatment: Hydraulically pre-tensioned at the factory to virtually eliminate initial chain stretch and frequent re-tensioning stops.

Long-Lasting Sharpness: Advanced semi-chisel tooth geometry and precision chrome plating hold an edge up to 10% longer than standard comparable chains.

Narrow-Kerf (Pixel) High Efficiency: Cuts a narrower path through timber, reducing engine load and boosting cutting speed on 40cc–55cc powerheads.

Low-Kickback & Low-Vibration: Meets ANSI low-kickback safety standards while engineered with ramped depth gauges and chassis dampening for smooth control.

Golden Tie-Strap Visual Filing Marker: Features Husqvarna’s signature gold-colored tie strap to easily identify the starting point when hand-filing in the field.

Technical Specifications:

Brand: Genuine Husqvarna (OEM Factory Original)

Part Number: 581643656 (581 64 36-56 / 5816436-56)

Chain Model: X-CUT SP33G (Semi-Chisel Pixel)

Bar Length Compatibility: 13 Inches ( $13\text{ in}$ / 33 cm)

Chain Pitch: .325" ( $0.325\text{ in}$ )

Chain Gauge: .050" ( $0.050\text{ in}$ / 1.3 mm)

Drive Link Count: 56 Drive Links (56DL)

Cutter Profile: Semi-Chisel Narrow Kerf (Low-Kickback Bumper Link)

Recommended File Size: 3/16" ( $3/16\text{ in}$ / 4.8 mm) Round File

Condition: Brand New in Official Factory Retail Box

Guaranteed Equipment Model Compatibility Matrix:

Specifically engineered for direct fitment on 13-inch guide bars with .325" pitch and .050" gauge (56 drive links) across the following platforms:

Husqvarna Professional & Commercial Chainsaws:

Fits Husqvarna 550 XP & 550 XP Mark II (equipped with 13" .325 .050 56DL bar).

Fits Husqvarna 545 & 545 Mark II .

Fits Husqvarna 543 XP .

Fits Husqvarna T540 XP / T540 XP Mark III (when running .325 pitch setup).

Husqvarna Landowner & Farm Chainsaws:

Fits Husqvarna 440 & 440e .

Fits Husqvarna 445 & 445e .

Fits Husqvarna 450 & 450 Rancher (when equipped with 13" .325" setup).

Fits Husqvarna 435 & 435e .

Jonsered, RedMax & Maruyama Forestry Platforms:

Fits commercial saws running 13" narrow-kerf bars specifying .325" pitch, .050" (1.3 mm) gauge, and 56 drive links (such as RedMax GZ380 / GZ4300 series).

Direct Application: Direct replacement for any bar and chain combo requiring a 13-inch loop with 56 drive links in .325" pitch and .050" gauge.

Specifications

• Battery Included: No
• Voltage: 110 volt
• Item Height: 1.000
• Compatible Model: 581643656, B0G3HQZRRT, 435, 440, 445, 450, 450 Rancher
• Material: Metal
• Item Length: 6.000
• Item Width: 1
• Item Weight: 0.5000
• Country of Origin: United States
• Compatible Brand: For Husqvarna
• Type: Chain
• Power Source: Gasoline

Condition: New