Southbend sb1015f Gap Removal Installation, To remove the gap, To re-install the gap

For Machines Mfg. Since 7/09 S E R V I C E EVS Toolroom Lathes

Gap Removal &

Installation

A portion of the lathe bed directly under the spindle, the gap insert (Figure 150), can be removed to create additional space for turning large diameter parts.

The gap insert was installed, then ground flush with the bed at the factory to ensure precise fit and alignment. Therefore, if the gap insert is removed, it may be difficult to re-install with the same degree of flushness and accuracy as when installed at the factory.

Gap Insert

Figure 150. Gap insert that can be removed from bed.

Tools Needed:	Qty
Hex Wrenches 4, 6, 8mm	1 Each
Wrench 17mm	1

To remove the gap:

1.Remove the four gap bed cap screws, shown in Figure 151, that secure the gap insert to the bed.

Dowel Pin	Gap Bed
Jack Nut	Cap Screw

Way End

Cap Screw

Way Set

Screw

Figure 151. Fasteners holding gap in place.

2.Remove the two way end cap screws and way set screws shown in Figure 151.

3.Tighten the two dowel pin jack nuts (Figure 151) until the pins are pulled free from the gap insert.

4.Tap the outside of the gap insert with a dead blow hammer to loosen, then remove it.

To re-install the gap:

1.Use mineral spirits and a clean lint-free rag to clean the mating surfaces of the gap, bed, and ways. If necessary, stone the mating surfaces to remove scratches, dings, or burrs.

2.Wipe a thin layer of light machine oil on the mating surfaces.

3.Place the gap insert into the gap and use a block of wood or dead-blow hammer to align the insert with the lathe bed.

4.Back off the dowel pin jack nuts, and tap the dowel pins back into their respective holes until seated. This process will further help align the gap insert and bed mating surfaces.

5.Install all fasteners (except the way set screws) and lightly snug them in place.

6.Mount a base-mounted dial indicator to the top of the saddle to indicate alignment. First test the peak of the two prisms the saddle rides on, then test the flanks of the prisms. Jack the insert up or down by tightening or loosening the gap bed cap screws.

7.Alternately tighten the fasteners and tap the side of the gap insert into alignment.

8.Inspect the gap position 24-hours later to make sure the gap is still aligned, adjust if necessary, then install the two way set screws.

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