AccuPlus™ Steep-Taper Face-Contact Chucks Technical Features

Primary Applications

Face-Contact tapers provide additional radial load capabilities due to the large spindle contact surface compared with standard ANSI B5.50 or MAS BT 403 tapers.

• Excellent for long-reach axial cutting tools where cutting tool tip TIR is critical for part dimension achievement and machined surface location
• With the wide face-contact longer axial cutting tools with high radial loads will have less “bending” or improved dynamic stiffness and rigidity. The vibration dampening of these holders reduces spindle wear and extends cutting tool life.
• Designed for use in CNC Machining Centers with Face Contact spindles and automatic tool changers

Principle Behind Face-Contact Technology

• Prior to spindle clamping, the tool taper and spindle are in contact with each other to establish good taper interface and once clamped, face contact is made because the elastic deformation of the spindle clamping system provides the proper face clamping force between spindle face and tool holder flange face.
• This simultaneous fit provides a strong spindle/tool shank connection for more accurate machining processes and increased tool life due to improved tool assembly (spindle-toolholder-cutting tool)
• Face Contact holders are universally suitable for Drilling, Face milling, End mill with radial loads, Reaming, and even grinding is machine control is capable. The vibration dampening of this face contact system reduces spindle wear and extends cutting tool life.

Important Note about AccuPlus™ and other face contact steep taper tools:

If machine has standard face contact spindle design and face contact holders are to be used, ALL tool holders should be face contact style. Do not inter-mix standard steep taper holders with face contact holders for use in same machine spindle. Face contact holders must maintain contact with spindle face surface to maintain accuracy and proper toolholder shank/machine tool spindle taper interface. Using standard steep taper tools will allow chips, swarf, and residue to collect on the face when face contact is not being maintained thus using a face contact tool holder after using a standard steep taper tool could allow the face of the spindle to have contamination between spindle face and face contact of tool holder causing damage to spindle face and/or face contact holder. Start with AccuPlus and face contact and stay with it for ALL tool holder style in that machine.