Tsumura, Stihl Lightweight Chainsaw Bar 235FK4 - 30", 3/8", .063", D025, 3003 000 5253, 30030005253, 3003 000 9453, 30030009453, 303RNDD025

Tsumura Lightweight Chainsaw Bar - 30", 3/8", .063", D025

SKU = 235FK4

Product Overview

The Tsumura 235FK4 is a premium "Light & Tough" professional chainsaw bar manufactured in Japan. This 30-inch model is highly sought after by professional fellers because it solves the "nose-heavy" problem associated with long bars. By laser-cutting dove-tailed notches into the SKS-51 steel and filling them with hard resin, Tsumura reduces the bar's weight by approximately 20%.

This weight reduction allows for a 30-inch reach while maintaining the balance and maneuverability typically found in a much shorter bar, all without sacrificing the extreme rigidity required for straight felling cuts in heavy timber.

Genuine OEM & Aftermarket Cross-Reference

This bar is a 100% direct high-performance replacement for the following part numbers:

• STIHL (OEM): 3003 000 5253, 30030005253 (Rollomatic E) / 3003 000 9453, 30030009453 (Rollomatic ES Light)
• GA SPARES (ProKut): GAFCD3043RS (Professional Sprocket Nose)
• OREGON: 303RNDD025 (PowerCut™)
• GB: LHL30-63PA, LHL3063PA (Lush)
• SUGIHARA: ST2U-3Q75-A, ST2U3Q75A (Light Type)

Detailed Specifications

• Tsumura Part Number: 235FK4 (Light & Tough Series)
• Bar Length: 30" (75cm)
• Pitch: 3/8"
• Gauge: .063" (1.6mm)
• Drive Link Count: 98 DL
• Mount Type: D025 / 3003 (12.1mm Slot)
• Nose Type: 11-Tooth Replaceable Premium Sprocket Tip
• Construction: Resin-Filled Lightweight SKS-51 Japanese Steel

Fitment Guide

This bar utilizes the Stihl Medium/Large Mount (D025). Due to its length, it is recommended for high-displacement Stihl saws (running 3/8" pitch drive sprockets):

• Primary Recommendations: 044, 046, 064, 066, MS 440, MS 441, MS 460, MS 461, MS 462, MS 500i, MS 660, MS 661.
• Mid-Range (Occasional Use): MS 361, MS 362, MS 391, MS 400 (Note: Ensure saw has adequate oil flow for a 30" bar).

Why Choose Tsumura Lightweight Bars?

• Corrected Saw Balance: On a 30" bar, the weight saved at the tip is substantial. This moves the center of gravity back toward the powerhead, reducing leverage strain on the operator's wrists and back.
• Resin-Filled Rigidity: Unlike some "light" bars that use a hollow three-piece sandwich construction, Tsumura’s solid-body resin-filled design provides superior stiffness, which is critical for accuracy on a 30-inch span.
• Japanese SKS-51 Steel: Induction-hardened rails provide world-class durability. The steel is engineered to "spring" back to center if pinched, rather than staying bent like cheaper alternatives.

Tsumura Light & Tough – Reduced Weight Guide Bar – D025 (Stihl 3003 Mount)
A genuine Japanese Tsumura Light & Tough – Reduced Weight guide bar built for serious cutting performance in Australian hardwood.
This reduced-weight version features staggered weight-reduction dove-tailed slots cut into the bar body and filled with high-strength resin, lowering overall weight by approximately 20% while maintaining rigidity and rail durability.
Manufactured from a single piece of SKS-51 Japanese steel, this professional-grade guide bar is designed for demanding farm, firewood and forestry applications where reduced fatigue matters.

Technical Specifications
Mount Pattern: Oregon D025 / Stihl 3003
Common Application: Stihl saws approx. 60cc–91cc with 12mm bar studs
Pitch: 3/8"
Gauge: .063" (1.6mm)
Construction: Solid SKS-51 Japanese steel with resin-filled weight reduction