3" 77mm Engine Cylinder Hone – Flexible Silicon Carbide Ball Hone, 320 Grit, 2.900–3.055" Bore, Re-Ring & Final Finish Specifications: Diameter (nominal): 3" (77mm) Working bore range: 2.900" – 3.055" (73mm – 78mm) Grit: 320 silicon carbide Material: silicon carbide Type: Ball-style flexible hone Brush Features: Engineered for precise cross-hatch pattern on cylinder walls 320 grit ideal for deglazing, re-ringing, and final bore finishing Flexible design self-centers and compensates for minor bore variations Package: 1x flexible cylinder hone Brush Application: Engine rebuilding and cylinder refresh Deglazing prior to new piston ring installation Final smoothing after boring or sleeving Suitable for automotive, motorcycle, marine, and small-engine cylinders within bore range
3 " 77MM Engine Flexible Cylinder Hone Brush Silicon Ball 320 Grit
Items Description
3" 77mm Engine Cylinder Hone – Flexible Silicon Carbide Ball Hone, 320 Grit, 2.900–3.055" Bore, Re-Ring & Final Finish

Specifications:
100% brand new, never used
Diameter (nominal): 3" (77mm)
Working bore range: 2.900" – 3.055" (73mm – 78mm)
Grit: 320 silicon carbide
Material: Flexible silicon carbide abrasive balls on durable steel shaft
Type: Ball-style flexible hone Brush

Features:
Engineered for precise cross-hatch pattern on cylinder walls
320 grit ideal for deglazing, re-ringing, and final bore finishing
Flexible design self-centers and compensates for minor bore variations
Compatible with all engine block materials (cast iron, aluminum, etc.)
Slightly oversized (marked 3") to deliver correct wall pressure for 3" bores – no extra expansion needed


Package Includes:
1 x 3" flexible cylinder hone with 320 grit silicon balls
Mounted on standard 1/4" or 3/8" drive shank (ready for drill or honing machine)


Application Scenarios:
Engine rebuilding and cylinder refresh
Deglazing prior to new piston ring installation
Final smoothing after boring or sleeving
Suitable for automotive, motorcycle, marine, and small-engine cylinders within bore range

Usage Note:
Use with honing oil or light cutting fluid; run at 500–800 RPM with moderate reciprocation for optimal finish. Always measure bore after honing to confirm fit.
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On Aug 9, 2026 at 23:31:07 PDT, seller added the following information:

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