12.1 Tailstock Setup

Tailstock Setup

Important: The warranty card should be filled out before you use the tailstock.

Important: When using Servo 5C Indexers, Haas Automation recommends using live center tailstocks only!

Note: Tailstocks cannot be used with the HRT320FB table.

Tailstocks must be properly aligned to the rotary table before using. Refer to page 5 for the alignment procedure.

To prepare the tailstock to mount on the table:

  1. Clear the button surface of the tailstock casting before mounting it to the mill table.
  2. If there are any noticeable burrs or nicks on the mounting surface, clean them with a deburring stone.

Tailstock Alignment

To align your tailstock:

  1. Mount the supplied 0.625 dia. locating pins to the bottom of the tailstock using 1/4- 20 x 1/2” socket head cap screw (SHCS).
  2. Mount the tailstock to a clean mill table.
  3. Fasten lightly to the mill table using 1/2-13 hex head bolt (HHB), hardened tooling washers and 1/2-13 T-nuts.
  4. Extend the tailstock spindle from the body. Use the tailstock spindle surface to sweep the tailstock spindle center line to rotary product center line, align to within 0.003 TIR.
  5. Once the unit is properly aligned, torque the 1/2-13 nuts to 50 ft-lb.

Installation/Removal of Morse Taper Accessories

To install or remove a Morse taper accessory:

  1. Inspect and clean the tailstock taper and the tapered surface of live center.
  2. Apply a light coat of oil on the center, before inserting it, into the spindle. This aids in removing the center, and also prevents corrosion buildup.
  3. Manual Tailstock - Live or dead centers: Retract the tailstock spindle into the body and the leadscrew forces the center out.
  4. Pneumatic Tailstock - Live centers: Wedge an aluminum bar between the face of the tailstock spindle and the rear surface of the live centers flange.
  5. Pneumatic Tailstock - Dead Centers: Thread dead centers are recommend (often called N/C Dead Centers). Use a wrench to hold the center in place, and turn the nut until it backs the center out from tailstock spindle.

HA2TS Setup (HA5C)

HA2TS Setup: [1] 2.50 Max Travel Tailstock

To set up the HA2TS (HA5C):

1.  Position the tailstock so that the tailstock quill is extended between 3/4" to 1-1/4".
This optimizes spindle rigidity (item [A]).

2.  Tailstock to HA5C head alignment can be accomplished by pushing the tailstock (item[ B]) to one side of the T-slots prior to tightening the flange nuts to 50ft-lb. Precision locating pins mounted on the bottom of the tailstock allow for quick alignment, since the pins are parallel within 0.001" of the spindle bore. However, make sure both tailstock units are positioned to the same side of the T-slot. This alignment is all that is needed for the use of live centers.

3.  Set the air regulator (item [C]) between, 5-40 psi., with a maximum 60 psi. It is recommended to use the lowest air pressure setting that provides the required rigidity for the part.

12.2 Tailstock Operation

Introduction

The operation of the tailstock is separated into manual and pneumatic types. Be sure the tailstock has been properly installed and aligned before operating.

Manual Tailstock Operation

To operate the manual tailstock:

  1. Position the manual tailstock so that after approximately 1" of tailstock spindle travel, the center comes into contact with the work piece/fixture. If the tailstock needs to be repositioned, repeat Step 4 of “Tailstock Alignment”
  2. Once in contact, apply only enough force on the handwheel to hold the workpiece/fixture securely.

    NOTE: The force required on the handwheel is similar to the force used in closing a typical garden faucet.

  3. Tighten the spindle lock at this time.

Pneumatic Tailstock Operation

NOTE: Excessive tailstock force, and misalignment greater than 0.003 Total Indicator Reading (TIR), causes premature wear on the geartrain and motor.

To operate the pneumatic tailstock:

  1. Position the pneumatic tailstock so that after approximately 1" of tailstock spindle travel, the center comes into contact with the work piece/fixture. If the tailstock needs to be repositioned, loosen the 1/2-13 hex head bolts (HHB) and repeat Step 4 of “Tailstock Alignment” section.
  2. Use of the tailstock spindle lock is optional when using pneumatic tailstock models. Use the following information to determine tailstock air pressure:
MODEL NORMAL OPERATING RANGE MAXIMUM AIR PRESSURE
Rotary Tables 10-60 psi (.7 - 4.1 bar) 100 psi (7 bar)
Servo 5C Indexers 5-40 psi (.3-2.7 bar) 60 psi (4.1 bar) for Live Centers only

Maximum Air pressure = 100 psi (7 bar) results in 300 lb (136 kg) tailstock force.

Minimum Air pressure = 5 psi (.3 bar) results in 15 lb (6.8 kg) tailstock force.

12.3 Tailstock Maintenance

Tailstock Maintenance

Daily: Use a shop rag to thoroughly clean the unit free of chips and apply a rust preventative such as WD-40.

Weekly: Use a standard grease gun and apply 1 full stroke to the top mount zerk fitting, for a pneumatic tailstock.

Monthly:  Use a standard grease gun and apply 1-2 full strokes to the top mount zerk fitting, for a manual tailstock.

Lubrication: Use MOBIL multipurpose grease with MOLY (Molybdenum disulfide) or equivalent.