OLFA 18mm Rotary Circle Cutter (CMP-3) - Adjustable Rotary Blade Cutter w/Ratchet Handle Cuts Perfect Circles for Crafts, Sewing, Quilting, Replacement Blade: RB18-2

What It Is

The OLFA 18mm Rotary Circle Cutter (CMP-3) is a handheld craft tool for cutting perfect circles in paper, fabric, and thin materials. It is not a lawn mower blade or part—it has zero compatibility with any lawn mower, trimmer, or outdoor power equipment.

Fitment & Compatibility

• Not for mowers: This tool is designed for sewing, quilting, scrapbooking, and general crafting. It does not fit any mower deck, spindle, or blade adapter.
• Measurement check: Cuts circles from 1" to 8.5" diameter. The blade is 18mm (0.7") rotary style, not a standard mower blade length or hole pattern.
• Replacement blade: Uses OLFA RB18-2 blades (sold separately). Do not attempt to use mower blades or other rotary cutters.
• Brand/model: Only compatible with OLFA CMP-3 cutter. Not interchangeable with other circle cutters or mower blade systems.

Key Things to Know

• Quality: High-precision Japanese steel blade; cuts cleanly through multiple layers of fabric or paper. Durable ratchet handle locks blade at 10 angles.
• Installation difficulty: Very easy—no tools required. Blade swaps take seconds with the built-in blade snapper. No mechanical installation needed.
• Common gotcha: This is commonly miscategorized in listings. If you need a mower blade, do not buy this. The price and rating are for a craft tool, not for lawn equipment.
• Limitation: Cuts only thin, flat materials (up to ~1/8" thick). Not for metal, wood, or thick cardboard.

Should You Buy It

Buy this if you do sewing, quilting, or paper crafts and need precise, repeatable circles without templates. Skip it if you need a lawn mower blade—this will not fit any mower and will not cut grass. Verify your intended use before purchasing; the category label is misleading.