Eliminate jobsite downtime and expand your blade configuration options with the genuine STIHL Cutquik® 1" to 20mm Spindle Arbor Reducing Ring. This high-precision hardware adapter is engineered to seamlessly bridge the gap between varying blade standards, allowing commercial contractors to safely mount diamond wheels or abrasive cutoff blades with a standard 1-inch (25.4mm) center bore onto the proprietary 20mm safety arbor spindle standard across the STIHL TS gas saw lineup. Keep a few of these essential adapters in your tool matrix to ensure your crew is never stranded with incompatible cutting wheels on a remote jobsite.
Forged from premium-grade, high-tensile carbon steel, this reducing ring is precision-machined to strict tolerances. This ensures a flawless, concentric fit that completely eliminates blade runout, axial play, and high-speed vibration. By maintaining a perfectly centered rotating mass, this spacer ring protects your saw's internal spindle bearings, support flanges, and drive belt from premature wear. The slim, flush-mount profile seats deeply inside the blade core, allowing the outer drive washers and arbor bolt to apply uniform, unyielding clamping pressure across the entire mounting face.
Professional Safety & High-RPM Balance: Operating a handheld cutoff machine at speeds exceeding 4,000 RPM demands zero-compromise hardware stability. This genuine STIHL reducing ring features an exact-tolerance outer diameter to anchor the blade securely under maximum load and structural stress. Whether you are dry-cutting heavy asphalt or wet-cutting reinforced concrete beams, this industrial spacer delivers smooth, predictable linear tracking and enhanced operator safety.
Installation & Fitment Guide: Designed for use with all standard 12-inch, 14-inch, and 16-inch diamond wheels or abrasive cutoff blades featuring a 1" center hole. Universally compatible across STIHL TS 410, TS 420, TS 440, TS 500i, TS 700, and TS 800 gas-powered Cutquik® saws configured with a 20mm output shaft. Ensure the ring sits completely flush within the blade arbor before tightening the saw arbor bolt to specified torque settings.
Key Features & Benefits
- Universal Blade Adaptability: Converts standard 1-inch (25.4mm) blade arbor holes down to a precise 20mm fitment for instant saw compatibility.
- High-Tensile Carbon Steel Construction: Engineered to withstand extreme rotational stresses, high torque loads, and continuous professional field use.
- Precision-Machined Concentricity: Eliminates high-speed blade runout and off-center wobbling, ensuring smooth, vibration-free linear cuts.
- Protects Core Saw Machinery: Prevents spindle shaft scoring and absorbs harmonic vibration to extend the lifespan of your saw’s internal bearings.
- Ultra-Slim Flush-Mount Layout: Seats perfectly flat within the cutting wheel center core to maintain maximum clamping force from outer flange washers.
- Crucial Jobsite Contingency Component: Keeps your crews operational when matching 20mm native arbor blades are unavailable from local supply chains.
Technical Specifications & System Compatibility
| Brand / Component Tier | STIHL® Genuine Industrial Replacement Part |
| Product Component Line | Arbor Reducing Ring / Spindle Adapter Bushing |
| Blade Side Fitment (Outer Diameter) | 1 inch (25.4 mm) Center Bore Configuration |
| Saw Spindle Fitment (Inner Diameter) | 20 mm Safety Arbor Output Shaft |
| Material Composition | Heavy-Duty Hardened Carbon Steel Construction |
| Primary Fitment Compatibility | STIHL Cutquik® TS 410, TS 420, TS 440, TS 500i, TS 700, TS 800 Gas Saws |
| Environmental Compliance | California Proposition 65: Cancer and Reproductive Harm |