Value Collection SM0400840 Chucking Reamer Hss 0.0840 in

Product Description

The VALUE COLLECTION SM0400840 is a straight-flute chucking reamer designed for precision hole finishing in metal and other rigid materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this reamer delivers accurate final-pass sizing on through-holes and blind holes requiring a 0.0840-inch finished diameter. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. Right-hand cutting geometry makes it compatible with conventional clockwise-rotation machine setups. Machinists, toolmakers, and maintenance technicians reach for this style of reamer when tolerance and surface finish matter more than bulk material removal.

This chucking reamer is suited for bench drill presses, knee mills, CNC machining centers, and engine lathes running at reaming feeds and speeds. It is appropriate for small-diameter applications in the 0.0500 to 0.0999-inch range. Typical use cases include sizing pin holes, bearing bores, and close-tolerance through-holes in aluminum, mild steel, brass, and similar machinable alloys. The straight flute geometry is preferred in materials that tend to chatter with spiral flutes at small diameters.

Key Features

• 0.0840-inch finished-hole diameter for precise bore sizing
• High-speed steel (HSS) construction provides good wear resistance across common engineering materials
• Straight flute design reduces chatter tendency at small diameters
• Bright, uncoated finish allows visual wear inspection between uses
• Right-hand cutting direction compatible with standard machine spindle rotation
• Straight-cylindrical shank fits standard drill chucks and collets without adapters

Compatibility

Designed as an OEM-style replacement or standard tooling addition for machine setups requiring a straight-shank chucking reamer in the 0.0500 to 0.0999-inch diameter range.

Installation Notes

This reamer is installed by a machinist or toolroom technician. Secure the straight-cylindrical shank firmly in a drill chuck or collet holder and verify runout before cutting. Always ream at reduced feed and speed compared to drilling, and apply cutting fluid appropriate to the workpiece material. Never use a chucking reamer to remove more stock than the standard pre-ream allowance for the diameter class, as overloading will deflect the tool and degrade hole tolerance.