Accupro 587502 ER40 Collet 0.196 Inch 5.00mm

Product Description

The ACCUPRO 587502 is an ER40 series collet designed for use in CNC machining centers, milling machines, lathes, and other rotating spindle applications that accept ER40 toolholding systems. The collet clamps at a nominal size of 0.196 inches (5.00mm) and holds a minimum collet capacity of 0.157 inches (4.0mm), giving it a usable clamping range suited to small-diameter tooling. Total Indicator Runout (TIR) is rated at 0.01mm, which supports precise concentricity for drilling, reaming, and light milling operations. This collet is a single-piece item intended for professional machinists and toolroom technicians.

ER40 collets are widely used in production and job-shop environments where a standardized, high-accuracy toolholding system is required. This size is appropriate for holding drill bits, end mills, reamers, and taps within its clamping range. The ER40 format is one of the most common collet series in CNC and manual spindle applications, making this collet a routine replacement or addition to an existing toolholding inventory. It is suited for both light and moderate-duty cutting operations across ferrous and non-ferrous materials.

Key Features

• ER40 collet series — compatible with standard ER40 toolholding chucks and nuts
• Nominal collet size of 0.196 inches (5.00mm)
• Minimum collet capacity of 0.157 inches (4.0mm) for a usable clamping range
• 0.01mm TIR rating for consistent concentricity in precision machining
• Single-piece unit — no minimum order quantity beyond one collet

Compatibility

Designed for use with any ER40-standard collet chuck and clamping nut. Specific machine or chuck compatibility is not stated in the product data; verify that your spindle or toolholder accepts the ER40 collet series before installation.

Installation Notes

ER40 collets are installed by qualified machinists or toolroom personnel. Before inserting or removing a collet, ensure the machine spindle is fully stopped and all power is locked out per your facility lockout/tagout procedure. Seat the collet into the ER40 chuck by engaging the collet flange in the clamping nut before threading onto the toolholder body. Use a calibrated torque wrench and the chuck manufacturer's recommended torque specification — do not overtighten, as this can distort the collet bore and degrade TIR performance.