Tsumura, Stihl Chainsaw Bar - 18" 183PV4 - 3/8", .063" 66DL, D025, 3003 008 6117, 30030086117, 3003 000 9417, 30030009417, 183RNDD025

Tsumura Chainsaw Bar - 18", 3/8", .063" 66DL, D025

SKU = 18-31-A366-PS, 183PV4

Product Overview

The Tsumura 183PV4 is a professional-grade, solid steel chainsaw bar manufactured in Japan. Part of the "Premium" series, this bar is CNC-milled from a single plate of high-carbon SKS-51 tool steel. It features a replaceable sprocket nose (Premium Tip) secured by high-strength rivets, making it significantly more rigid and durable than standard laminated bars.

This bar is designed for the D025 (Stihl Medium/Large) mount and is the perfect choice for professional users who require a high-stiffness "workhorse" bar for mid-to-high displacement Stihl saws.

Genuine OEM & Aftermarket Cross-Reference

This bar is a 100% direct technical replacement for the following part numbers:

• STIHL (OEM): 3003 008 6117, 30030086117 (Rollomatic ES) / 3003 000 9417, 30030009417
• OREGON: 183RNDD025 (PowerCut™)
• GA SPARES: GAFCD1833RSP (ProKut Professional)
• GB: SN18-63PA
• WINDSOR: 184063STA

Detailed Specifications

• Tsumura Part Number: 183PV4 (Premium Series)
• Bar Length: 18" (45cm)
• Pitch: 3/8"
• Gauge: .063" (1.6mm)
• Drive Link Count: 66 DL
• Mount Type: D025 / 3003 (12.1mm Slot)
• Nose Type: 11-Tooth Replaceable Premium Sprocket Tip
• Construction: Solid One-Piece SKS-51 Japanese Steel

Fitment Guide

This bar utilizes the Stihl Medium/Large Mount (D025). It fits the following Stihl models (must be running 3/8" pitch drive sprockets):

• Mid-Range Saws: 024, 026, 028, 029, 034, 036, 039, MS 260, MS 261, MS 271, MS 290, MS 291, MS 310, MS 311, MS 361, MS 362, MS 390, MS 391.
• Large Professional Saws: 038, 044, 046, 064, 066, MS 440, MS 441, MS 460, MS 461, MS 462, MS 500i, MS 660, MS 661.

Why Choose Tsumura Premium Bars?

• Solid Steel Rigidity: Unlike laminated bars that can flex and "wander" in the cut, Tsumura solid steel bars provide a stable platform for perfectly straight bucking and felling.
• Japanese SKS-51 Steel: This proprietary alloy is famous for its "memory"—it can survive extreme stress and return to being perfectly straight, where other bars would stay bent.

Advanced Lubrication: Precision-engineered oil holes and a high-flow guide groove ensure that bar oil is retained where it’s needed most: at the bottom of the cutters and around the nose bearing.

Chainsaw Bar | Tsumura Light and Tough | Professional Performance
Premium Japanese-Crafted Chainsaw Bar for Professional Durability
Experience exceptional strength and precision with the Tsumura Light and Tough Chainsaw Bar - crafted in Japan using advanced manufacturing techniques and premium materials. This professional-grade guide bar delivers the
perfect balance of durability and performance that serious professionals demand for challenging cutting tasks.

Professional-Grade Features That Make the Difference

Premium SKS-51 Steel Construction: One-piece solid high-carbon steel provides exceptional strength and durability for demanding professional use
Proprietary Salt Bath Heat Treatment: Creates the perfect balance of hardness and toughness for superior wear resistance and longevity
Precision Laser-Cut Manufacturing: Ensures exact specifications and consistent rail dimensions for smoother chain operation
Replaceable Sprocket Nose with Grease Point: Extends bar life by allowing replacement of the most wear prone component and proper bearing lubrication
Optimized Oil Flow Design: Ensures proper lubrication throughout the bar to reduce friction and heat buildup
Reduced Vibration Technology: Engineered for smoother operation and improved control during cutting
Professional-Grade Balance: Designed for optimal handling and reduced operator fatigue

Technical Specifications
Pitch: 3/8" or .404" (select from dropdown menu)
Gauge: .063" (1.6mm)
Mount: SN, D025 - Designed for 12mm stud Stihl chainsaws
Construction: Premium Japanese SKS-51 steel with salt bath heat treatment
Nose Type: Replaceable sprocket with grease point
Available Lengths: Multiple options from 18" to 30" 

Fits a wide range of Stihl chainsaws including: 024, 026, 027, 028, 029, 030, 031, 032, 034, 036, 038, 039, 040, 041,
042, 044, 045, 046, 048, 056, 064, 066, E15, E20, E220C, FARMBOSS, MS260, MS261, MS270, MS271, MS280,
MS290, MS310, MS360, MS361, MS380, MS381, MS390, MS400, MS440, MS460, MS461, MS462c, MS500i, MS650,
MS660, MS661