Haas SL-20 User Manual

ES0381 rev P 01/08
1
SL-20/30/40 Lathes
STEADY REST OPTION
The steady rest platform provides for increased support of longer shaft turning and boring operations using
various automatic hydraulic aftermarket steady rests. The steady rest mounting platform is manually posi-
tioned along the Z-axis and is locked in place by a mechanical clamp. It can be used in conjunction with the
tailstock option.
Industry standard mounting holes to accept a variety of aftermarket steady rest grippers manufactured by
LMC, Forkhardt, SMW Systems, Rohm, and SMW Autoblock.
NOTE: Some brands and/or models of steady rests may not fi t the Haas bolt pattern and
a special adaptor plate would need to be fabricated by the customer.
STEADY REST HEAD INSTALLATION
Install the steady rest on the platform. Do not tighten the mounting bolts as the head unit will need to be
aligned during the part setup. This is described in the following section.
Attach the existing hydraulic hoses, from the lathe, to the steady rest head. These are just inside of the lower
sheetmetal, above the chip tray. The fi ttings at the end of the hoses are female JIC-4. The hose to clamp
the steady rest is attached to the top tube and the unclamp hose is attached to the lower tube. If necessary,
secure the fl exible hoses so they do not come in contact with any chip removal system.
Position the steady rest along the Z-axis by pulling the clamp handle toward the spindle to release the clamp.
Push the steady rest to the desired location and reengage the clamp.

Haas SL-20 Specifications

General

Spindle Speed	4000 rpm
Spindle Motor Power	20 hp
Turret Type	Bolt-on
Bar Capacity	2 in (51 mm)
Turret Capacity	10 stations

Summary

Steady Rest Option Overview

Steady Rest Head Installation Guide

Instructions for installing the steady rest head, attaching hoses, and positioning the unit along the Z-axis.

Steady Rest Operation and Setup

Steady Rest Setup Without Tailstock

Procedure for mounting the steady rest, clamping workpiece, checking deflection, and tightening.

Steady Rest Programming with M Codes

Details on using M codes M59 and M69 for automatic clamping and unclamping of the steady rest.

Steady Rest Maintenance and Alignment

Steady Rest Platform Alignment Procedure

Steps to realign the steady rest platform using a dial indicator after a crash or removal.

Steady Rest Travel Limits

Travel Limits for SL-20L and SL-30L

Dimensions A, B, and C indicating travel limits for SL-20L and SL-30L models.

Steady Rest Mount Platform Details

Mount Platform for SL-20L

Detailed dimensional drawings of the steady rest mount platform for the SL-20L model.

Steady Rest Envelope Drawings

Envelope Drawing for SL-20L

Diagram showing the steady rest envelope dimensions and angles relative to the spindle center.