reCool for Quill Feed Drilling Units

December 13, 2018
reCool for Quill Feed Drilling Units

What is the main purpose for coolant application? Of course, among many reasons, primarily it’s for the lubrication and cooling of the cutting edge and, in addition, to help facilitate chip evacuation. REGO-FIX has launched a cost-effective and efficient attachment for the application of coolant-lubrication liquids through the tool, based on an ER collet nut, which is suitable for use on SUHNER feed drilling units.  

Optimizing the cooling and lubrication effect to help increase chip removal, tool life and performance requires the coolant-lubricant mix in direct contact with the cutting edge of the tool. Namely, for drilling operations, internal coolant becomes more and more essential. In the past, the application of an internal pressurized coolant-lubricant mix, especially for quill feed units, presented challenges and complications.

A new approach engineered by REGO-FIX is called reCool, where the coolant-lubricant mix enters the collet from the radial direction and then passes through the tool. It is simple and effective. Based on this idea, SUHNER adapted the reCool principle and designed attachments for the application of  internal coolant liquids for its MONOmaster and MULTImaster families of quill feed drilling units.

Drilling with coolant through the tool applications typically allow for a 20 percent increase in surface cutting speed, which results in higher chip-removal rates and drastically reduces the machine cycle time. 

This solution allows users to retrofit SUHNER quill feed units with internal coolant supply, even on existing machines in a very clever, uncomplicated way, thus providing increased benefits in machine efficiencies and production time.


  • Simple retrofit for existing quill feed units
  • Optimal cooling and lubricating at the tool
  • Up to 20 percent higher surface speed
  • Good chip removal
  • Optimal lubrication for every tool
  • No deflection or dissolving of coolant

Technical data:

  • Spindle speed up to 12,000 rpm
  • Coolant pressure: 50 bar/725 psi
  • Flow of coolant lubricates internal bearings
  • Used for internal and external coolant application

Related Glossary Terms

  • collet


    Flexible-sided device that secures a tool or workpiece. Similar in function to a chuck, but can accommodate only a narrow size range. Typically provides greater gripping force and precision than a chuck. See chuck.

  • coolant


    Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.

  • cutting speed

    cutting speed

    Tangential velocity on the surface of the tool or workpiece at the cutting interface. The formula for cutting speed (sfm) is tool diameter 5 0.26 5 spindle speed (rpm). The formula for feed per tooth (fpt) is table feed (ipm)/number of flutes/spindle speed (rpm). The formula for spindle speed (rpm) is cutting speed (sfm) 5 3.82/tool diameter. The formula for table feed (ipm) is feed per tooth (ftp) 5 number of tool flutes 5 spindle speed (rpm).

  • feed


    Rate of change of position of the tool as a whole, relative to the workpiece while cutting.