Collis Tool 70086 Quick Change Master Holder R8 Taper

Product Description

The COLLIS TOOL 70086 is a Quick Change Master Holder designed for use with the Rapid Switch 200 quick change tooling system on rotary machine tools. It features an R8 taper shank for direct spindle mounting and a 2.56 inch nose diameter with a 3.12 inch projection. This holder serves as the base component of the quick change system, allowing tool holders to be swapped rapidly without removing the master holder from the spindle. It is intended for machinists and tool room technicians working on milling machines, knee mills, and similar vertical spindle equipment equipped with R8 spindles.

The 70086 is suited for production and maintenance machining environments where reducing tool change time is a priority. The Rapid Switch 200 system is designed for shops running multiple tooling setups on a single machine, and this master holder is the core interface between the machine spindle and any compatible Rapid Switch 200 tool holder. It is appropriate for both manual and light CNC-retrofitted vertical mills with R8 spindle bores.

Key Features

• R8 taper shank for direct mounting in R8-spindle milling machines
• 2.56 inch nose diameter provides a stable interface for quick change tool holders
• 3.12 inch projection accommodates standard Rapid Switch 200 tool holder engagement
• Part of the Rapid Switch 200 quick change system for faster tool swaps without spindle removal
• Package quantity of 1 master holder per unit

Compatibility

Designed for use with the Rapid Switch 200 quick change tooling system on milling machines equipped with an R8 spindle taper. Compatible tool holders must be Rapid Switch 200 series to engage this master holder.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing the master holder from the spindle bore. Follow the machine manufacturer's draw bar torque guidance for R8 tooling and ensure the taper and spindle bore are clean and free of chips or debris before seating the holder. Do not use damaged or worn holders, as improper seating in an R8 spindle can cause runout and unsafe tool release.