Hertel 72300106 Chucking Reamer 5/32 Inch Cobalt Steel

Product Description

The HERTEL 72300106 is a straight-flute chucking reamer designed to finish-ream drilled holes to a precise diameter of 5/32 inch (0.1562 inch decimal). Built from cobalt steel, it handles tougher materials and elevated cutting temperatures better than standard high-speed steel. The bright, uncoated finish keeps the surface geometry sharp and predictable. With an overall length of 4 inches and a 1-inch flute length, this reamer fits standard machine tool chucks and collets. It cuts right-hand and is suited for use in drill presses, lathes, and milling machines. Machinists and tool-and-die technicians are the primary users.

This reamer is applied in precision metalworking operations where a drilled hole must be brought to a tight final diameter tolerance. Typical applications include fixture work, jig boring, and component fitting where a clean, accurate bore is required. The cobalt steel construction makes it a practical choice when reaming alloy steels, stainless, or other work materials that generate high cutting heat. The straight flute geometry works well in through-holes and provides easy chip clearance in most ferrous and non-ferrous materials.

Key Features

• Cobalt steel construction for improved heat and wear resistance over standard HSS
• Straight flute geometry for consistent chip evacuation in through-hole applications
• Right-hand cutting direction, compatible with standard spindle rotation
• 4-flute design balances cutting load and hole finish quality
• Bright, uncoated finish preserves sharp cutting edges
• Straight-cylindrical shank for use in drill chucks and collet holders

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, and milling machines equipped with a chuck or collet capable of holding a straight-cylindrical shank in the 5/32 inch diameter range.

Installation Notes

Chucking reamers are installed by licensed machinists or skilled trades workers in machine tool setups. Always power down and lock out the spindle before securing or removing the reamer from the chuck or collet. Use cutting fluid appropriate for the work material to extend tool life and improve hole finish. Never use a chucking reamer to remove more material than the recommended reaming allowance, as this accelerates wear and degrades hole tolerance.