Osg 640-1881 Diamond Pattern Router Bit 3/16 in Solid Carbide

Product Description

The OSG 640-1881 is a solid carbide diamond pattern router bit designed for cutting and routing fiberglass materials. It features a 0.1875 inch cutter diameter, a 0.625 inch length of cut, and a plain (no end) tip configuration. The right-hand cutting direction and bright uncoated finish make this bit well suited for clean, controlled passes through fiberglass laminates and composites. With a 1/4 inch shank diameter and a 2 inch overall length, it mounts easily in standard router collets used across fabrication and trade shop environments. This bit is typically installed and operated by machinists, composite fabricators, or skilled tradespeople working with fiberglass panels and assemblies.

The OSG 640-1881 is intended for use in fiberglass applications where a diamond pattern cut geometry improves chip evacuation and surface finish quality. It is suited for routing, slotting, and profiling operations on fiberglass sheets and panels in both production shop and field fabrication settings. The compact cutter diameter and short length of cut allow precise work in tight areas or along finished edges. This bit is used with handheld routers or CNC router setups that accept a 1/4 inch shank.

Key Features

• Solid carbide construction for hardness and wear resistance in abrasive fiberglass materials
• Diamond pattern cut geometry aids chip evacuation during fiberglass routing
• 0.1875 inch (3/16 inch) cutter diameter for fine, controlled cuts
• 0.625 inch length of cut accommodates typical fiberglass panel thicknesses
• Right-hand cutting direction for use with standard router rotation
• Bright uncoated finish — no coating buildup to affect dimensional accuracy

Compatibility

Designed for use with routers accepting a 1/4 inch shank collet. Material application is fiberglass as specified by the manufacturer.

Installation Notes

Install this bit into a properly sized 1/4 inch collet and ensure the collet nut is fully tightened before operation. Disconnect power to the router before changing bits. When routing fiberglass, use appropriate respiratory protection and eye protection, as fiberglass dust is a respiratory and skin irritant. Follow applicable shop safety standards and equipment manufacturer guidelines for feed rate and spindle speed selection.