Tsumura, Stihl Premium Chainsaw Bar 20" 203PV4 - 3/8 - .063 D025 3003 008 6121, 30030086121, 3003 000 9421, 30030009421, 203RNDD025

Tsumura Premium 20" - 3/8 - .063 Chainsaw Bar, D025

SKU = 20-31-A372-PS, 203PV4

Product Overview

The Tsumura 203PV4 is a professional, high-performance chainsaw bar manufactured in Japan from premium SKS-51 carbon steel. As part of the "Premium" series, this bar is CNC-milled from a single piece of solid steel, providing maximum rigidity for straight, accurate cuts in heavy timber. It features a replaceable sprocket nose (Premium Tip) secured by high-strength rivets, designed to withstand the high-torque output of professional Stihl saws.

This bar utilizes the D025 (Stihl Medium/Large) mount and is the standard choice for professional loggers and arborists running 20-inch setups on mid-to-high displacement powerheads.

Genuine OEM & Aftermarket Cross-Reference

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

• STIHL (OEM): 3003 008 6121, 30030086121 (Rollomatic ES) / 3003 000 9421, 30030009421
• OREGON: 203RNDD025 (PowerCut™)
• GA SPARES: GAFCD2033RSP (ProKut Professional)
• GB: SN20-63PA, SN2063PA
• SUGIHARA: ST2U-3Q50-A, ST2U3Q50A

Detailed Specifications

• Tsumura Part Number: 203PV4 (Premium Series)
• Bar Length: 20" (50cm)
• Pitch: 3/8"
• Gauge: .063" (1.6mm)
• Drive Link Count: 72 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?

• SKS-51 Japanese Steel: Unlike standard bars, Tsumura uses a proprietary high-carbon alloy that offers superior rail hardness and "spring" memory, meaning the bar stays straight even after heavy pinching.
• Precision Oiling: Features a specialized oil hole design that forces lubrication into the high-wear areas of the chain chassis, extending the life of both the bar and the chain.

Professional Rigidity: The solid steel construction eliminates the "flex" often found in laminated bars, allowing for more aggressive boring cuts and cleaner felling.

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.

Perfect for Demanding Applications
Professional logging operations
Commercial arborist work
Forest management
Land clearing projects
Heavy-duty farm and ranch work
Disaster cleanup operations
Any application requiring maximum durability and precision

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