Value Collection SC00186460 MT4 to MT6 Taper Extension

Product Description

The VALUE COLLECTION SC00186460 is a Morse taper extension adapter designed to connect tooling with an MT4 inside taper to a machine spindle with an MT6 outside taper. At 14 inches overall length (OAL), this adapter extends reach for deep-bore drilling, reaming, or similar metal-cutting operations where standard tooling cannot access the workpiece. Constructed from medium carbon steel with a soft body and hardened tang, it provides the toughness needed for sustained cutting loads while maintaining tang integrity under drive force. Machinists and tool-and-die technicians are the primary users of this type of adapter.

This adapter is suited for use in heavy-duty machining centers, floor-standing drill presses, and horizontal or vertical milling machines equipped with an MT6 spindle taper. The MT4 inside socket accepts standard MT4-shanked tooling such as drill chucks, twist drills, reamers, and boring tools. The extended OAL makes it particularly useful for production setups involving deep-hole work or fixtures that require additional clearance between the spindle face and the workpiece or tooling assembly.

Key Features

• MT4 inside taper accepts standard MT4-shank tooling
• MT6 outside taper fits MT6 machine spindles
• 14-inch OAL provides extended reach for deep-bore applications
• Medium carbon steel construction for rigidity under cutting loads
• Soft body with hardened tang resists drive-force wear at the spindle interface

Compatibility

Designed as a direct-fit extension adapter for machine spindles with an MT6 taper, accepting any MT4-shank tooling per standard Morse taper specifications.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before inserting or removing the adapter, power down the machine and bring the spindle to a complete stop. Clean both the spindle bore and the adapter taper surfaces thoroughly to remove chips, oil film, or debris that could cause misalignment or reduce holding force. Use a drift punch and the appropriate spindle slot to release the adapter during removal; do not strike the adapter body directly.