Prevent Costly Repairs with Through-Spindle Coolant Pin Maintenance

Ron Sanders

If you have a Through-Spindle Coolant (TSC) delivery system on your CNC machine, you’ll need to replace the through-spindle coolant pin at recommended intervals as part of your preventive maintenance program. If pin maintenance is neglected, it may become worn or damaged, resulting in coolant leakage, reduced pressure and costly repairs.
 

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BENEFITS OF THROUGH-SPINDLE COOLANT

A Through-Spindle Coolant system pushes coolant through the cutting tool to:

  • Cool the cutting edge
  • Reduce friction
  • Remove chips

HOW TSC WORKS

The process starts with the 1000 psi coolant flowing through the rotary union and the drawbar. This forces the through-spindle coolant pin to contact a specific pull stud, allowing coolant or air to exit the tool. It’s a streamlined process when regular pin maintenance is performed.

EFFECTS OF TSC PIN NEGLECT

If the through-spindle coolant pin becomes worn, high-pressure coolant will leak between the through-pin seal and the pull-stud. When this occurs, the cavity between the tool and the drawbar becomes pressurized with coolant. If damage is severe, eventually the pressurized coolant will begin to bypass the check valves or the seals on the drawbar and contaminate the internal clamping system, causing premature failure.

Additionally, if pressurized coolant overcomes the spindle air curtain for an extended period of time, it can contaminate the bearing stack. This leads to abnormal temperatures and increases the possibility of bearing deterioration.

PREVENTIVE MAINTENANCE KIT

Through-spindle coolant pin maintenance is crucial to maintaining optimal cutting speeds and throughput. You can find a recommended preventive maintenance outline in your machine’s operations and maintenance manual. Okuma’s CARE PM Kit contains all of the components required for proper maintenance of the TSC system. Please contact your local distributor for CARE PM Kit availability.

SPRING INTO THE SEASON

10% OFF COOLANT PIN SPRINGS

Okuma understands the importance of preventive maintenance to keep your machine running and producing quality parts at all times. We recommend changing the through-spindle coolant pin as described in the service tip above. Whenever you change the pin, we recommend you always use new springs. This practice minimizes machine damage and downtime.

Okuma is pleased to offer a 10% discount on all through-spindle coolant pin springs! This is a limited time offer, so take advantage of this special to stock up on these items and keep your machine running efficiently.

Contact your distributor for this special offer and use promo code ‘SPRINGS2020’.

Offer expires May 30, 2020.

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