Cone Reamer Abraboro HSS-Co 3.8–25.0 mm, 67 mm length

The Abraboro Cone Reamer HSS-Co 3.8–25.0 mm, 67 mm length is a precision cutting tool for enlarging and finishing conical holes in metalworking and toolroom environments. Manufactured from high-speed steel with cobalt (HSS-Co), the cone reamer delivers improved wear resistance and heat tolerance during repeated machining operations. Its conical cutting diameter range from 3.8 mm up to 25.0 mm and compact overall length of 67 mm make it suitable for working on stepped or tapered bores where a single tool must cover multiple diameters.

Advantages

The HSS-Co material provides higher hardness at elevated temperatures compared with standard high-speed steel, extending tool life under continuous cutting. The conical geometry enables smooth enlargement and finishing of tapered holes with consistent surface quality and dimensional accuracy. With a compact 67 mm length, the tool offers improved rigidity and reduced runout risk compared with longer reamers, helping maintain concentricity in finishing operations.

Suitable for

• Enlarging and finishing conical or tapered holes in steel and non-ferrous metals
• Toolroom and maintenance work where multiple diameters must be processed with a single tool
• Prototype machining and small-series production requiring accurate tapered bores

Key specifications

• Cutting diameter range: 3.8 mm – 25.0 mm (conical)
• Overall length: 67 mm
• Material: high-speed steel with cobalt (HSS-Co)
• Application: conical reaming and finishing of metal bores

How to use

Select appropriate spindle speed and feed for the workpiece material, using coolant or cutting fluid to maintain temperature and chip evacuation. Secure the workpiece and ensure alignment of the tool with the bore axis before entering the hole. Advance the cone reamer steadily through the bore, allowing the progressive diameter to cut gradually; avoid excessive feed rates that may deflect the tool or compromise surface finish. After reaming, withdraw the tool carefully and inspect the tapered bore for dimensional accuracy and surface quality.

Usage recommendations

For best results, use cutting fluid suitable for the workpiece material, maintain correct spindle speed to avoid overheating, and ensure the machine and toolholders provide adequate rigidity. Regularly inspect and replace the reamer when wear affects cutting edges to preserve dimensional tolerance and finish.