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HSK-A63 - Spindle Drawabar - Push Out

Service Home How To Procedures HSK-A63 - Spindle Drawabar - Push Out

HSK-A63 - Spindle Drawabar - Push Out

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Recently Updated Last updated: 12/27/2021

HSK-A63 - Spindle Drawbar - Push Out


Introduction

IMPORTANT: This procedure is intended for HAAS HSK - A63 spindle only. Do not use for H-5AX ES779 or ES789 spindles.

This procedure outlines how to set the push out on the HSK-A63 Spindle Drawbar.

Tools Required:

  • Depth Gauge
  • HSK Clamp Force Gauge
  • Torque Wrench
  • 5mm hex bit

HSK-A63 - Set Push Out

1

  • Set Push Out:
  • Engage the TRP (Tool Release Piston) so that the drawbar is in the unclamped position
  • With the TRP engaged, use a depth gauge to measure the distance between the face of the clamping cone and the face of the spindle [1]
    • NTE (not to exceed) [0.41 in +/- 0.004 in] OR [10.5 mm +/- 0.1mm]
    • NOTE: For H-5AX HSK A63 spindles the push out distance is NTE (not to exceed) [0.417 in +.003/- 0 in] OR [10.59 mm +/- 0 mm]
  • If the push out is not within the above specification do the following:
  • Loosen the locking screw only 1-2 turns   
    • Note: backing out the locking screw too much can damage the spindle 
  • Unscrew or tighten the clamping cone to adjust the push out distance measured
  • Once set snug the locking screw using a 24mm wrench on the flats of the clamping cone and a 5mm hex bit

2

  • Torque Locking Screw:
  • Insert a hollow HSK-A63 tool holder without a collet to the spindle - this will prevent the drawbar from rotating while you torque the locking screw
    •  Use a long 5mm hex bit that will reach through the tool holder and a collet spanner wrench on the tool holder to prevent it from rotating
  • Torque the locking screw to 20 Ft-lbs  (27 N-m)
  • Check clamp force 2,835 - 4,050 lbs
    • Note: A new unit should be near 4,050 lbs, but if you are simply replacing it after cleaning, slightly lower force is acceptable
    • Once the force drops below 70% of max (2,835 lbs) is when the unit needs to either be re-greased, cleaned, inspected for damage, or have the drawbar inspected for damage as well.
  • To achieve clamp force the clamping unit must be thoroughly greased, the drawbar must not have broken springs, the gripper segments must not be broken, and the spacer unit and gripper segments must not be worn

Set TRP Clamp Switch

1

Place a tool in the spindle and verify it is seated correctly. A correctly installed tool has no gap and is seated flush to the spindle [1].

2

Remove the spindle head cover to gain access to the clamp switch.

Loosen the (2) screws [1] that hold the Clamp switch block [2] to the TRP.

Slowly slide the block [2] and sensor towards the spindle until the sensor [3] turns ON (becomes red).

Then lightly tighten the (2) screws [1].

3

Test Sensor Adjustment

1. Remove the tool from the spindle.

  • The sensor should turn OFF and remain OFF.

2. Insert the tool in the spindle incorrectly, so that is a gap between the tool and spindle.

  • The sensor should stay OFF.

3. Re-Insert the tool correctly.

  • The sensor should turn ON.

Note: If any of these three tests are not met, readjust the switch until all three are satisfied. 

Perform this sensor test using (2) other tool holders.

When the sensor adjustment is satisfied, torque the (2) 1/4-20 SHCS that hold the sensor block. Refer to HAAS Fastener Torque Specifications.

4

Proceed to the following procedures:

  • Set Z-Axis Tool Change Offset: Refer to SIDE-MOUNT TOOL CHANGER - Z-AXIS TOOL CHANGE OFFSET - NGC
  • Set Spindle Orientation: Refer to SIDE-MOUNT TOOL CHANGER - HSK - SPINDLE ORENTATION OFFSET - NGC
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