DeWalt 389243-00 1/8" Collet – Genuine OEM Replacement Cut-Out Tool Collet

Part Number: 389243-00
Category: Power Tool Parts & Accessories → Rotary & Cut-Out Tool Parts → Collets
Type: DeWalt 389243-00 1/8" Collet – Genuine OEM Replacement Cut-Out Tool Collet

The DeWalt 389243-00 1/8" Collet is a genuine OEM replacement collet designed for compatible DeWalt cut-out tools. This precision-machined collet securely grips 1/8-inch shank router and cutting bits, ensuring accurate bit alignment and reliable holding power during drywall, wood, plastic, laminate, and other cut-out applications. Manufactured to original equipment specifications, it provides a direct-fit replacement for worn, damaged, or distorted collets, helping restore safe operation and precise cutting performance.

Key Features & Benefits

• Part Number: 389243-00
• Genuine OEM DeWalt replacement part
• Replacement 1/8-inch cut-out tool collet
• Securely grips 1/8" shank cutting bits
• Maintains accurate bit centering for smooth operation
• Helps reduce bit slippage during use
• Precision-machined OEM construction
• Direct-fit OEM replacement
• Manufactured to original equipment specifications

Technical Specifications

Part Number: 389243-00

Manufacturer: DeWalt

Product Type: Collet

Collet Size: 1/8 in.

OEM Part: Yes

Application: Cut-Out Tool Bit Retention

Compatible Applications

The DeWalt 389243-00 1/8" Collet fits select:

• DC550K 18V Cut-Out Tool (Type 1)
• DC550KA 18V Cut-Out Tool (Type 1)
• DC550P Cut-Out Tool (Type 1)
• DC550W 18V Cut-Out Tool (Type 1)
• DC551KA 14.4V Cut-Out Tool (Type 1)
• DW660 Heavy Duty Cut-Out Tool (Type 1, 2 & 3)
• DW660K Cut-Out Tool Kit (Type 1 & 3)
• DW660S Cut-Out Tool (Type 1, 2 & 3)
• DW660SK Cut-Out Tool (Type 1, 2 & 3)

Always verify your tool model, type number, and original part number before ordering to ensure proper compatibility.

Function of the 1/8" Collet

The DeWalt 389243-00 Collet is a critical component of the tool's spindle assembly. It helps to:

• Securely clamp 1/8-inch shank cutting bits
• Maintain proper bit alignment during operation
• Minimize vibration and bit runout
• Prevent bit slippage under load
• Support accurate, controlled cutting performance
• Restore the tool's original holding capability

Using a genuine OEM replacement collet helps ensure secure bit retention, smooth operation, and consistent cutting accuracy.

Common Signs Replacement Is Needed

Replace the collet if you notice:

• Bit slipping during operation
• Difficulty tightening the bit securely
• Excessive vibration or runout
• Cracked, worn, or distorted collet
• Uneven gripping pressure
• Visible wear from repeated bit changes

A worn or damaged collet can reduce cutting precision, cause premature bit wear, and create unsafe operating conditions.

Installation & Service Notes

Disconnect the tool from the power source or remove the battery before performing any repairs.

Remove the collet nut and existing 389243-00 Collet according to the manufacturer's service instructions. Inspect the spindle, collet nut, and threads for dirt, wear, or damage before installing the replacement collet. Insert a compatible 1/8-inch shank cutting bit fully, then slightly back it out before tightening the collet nut securely to ensure proper clamping. Verify the bit is centered and securely retained before operating the tool.

Important: Always verify your tool model, type number, and original part number before ordering. Use only 1/8-inch shank accessories compatible with this collet unless your tool is equipped with an alternate OEM collet size.

Maintenance Recommendations

• Keep the collet and spindle free of dust and debris.
• Clean the collet regularly to maintain proper gripping force.
• Inspect the collet for wear or distortion during routine maintenance.
• Avoid overtightening the collet nut.
• Replace worn collets promptly to maintain cutting accuracy.
• Use genuine OEM replacement parts to maintain factory fit, secure bit retention, and long-term cut-out tool performance.