Grizzly G0554Z owner manual Dead Centers, Live Centers, Using Dead Center in Spindle

Centers

Your Model G0544Z lathe includes one HSS MT#3 dead center, one carbide-tipped dead cen- ter, and one MT#5–MT#3 tapered sleeve, as shown in Figure 35.

Carbide-Tipped

Dead Center

HSS Dead

Tapered Center

Sleeve

Figure 35. Tapered sleeve and dead centers.

The tapered sleeve is for mounting the HSS dead center in the spindle.

Dead Centers

A dead center is a one-piece center that does not rotate with the component it is mounted into and is used to support long, slender workpieces

Use the HSS dead center in the spindle where the workpiece does not rotate on the tip and does not generate friction.

The carbide-tipped dead center can better with- stand the effects of friction and is used in the tailstock when the workpiece rotates on its tip. In this case, the tip of the center must be lubricated with an anti-sieze lubricant to avoid premature wear and maximize smooth operation. Also, keep the spindle speeds low to reduce the heat and wear from friction.

Live Centers

Although the dead center achieves a more accu- rate finished product, it requires low spindle speeds to avoid heat from friction damaging the center of workpiece. The live center has bear- ings that allow the center tip and the workpiece to rotate together, and can be installed in the spindle and the tailstock quill for higher speeds, but with a slight bit of accuracy loss. Refer to the ACCESSORIES section on Page 48 for a live center option from Grizzly.

Using Dead Center in Spindle

When mounting the workpiece between cen- ters, install a lathe dog on the spindle end of the workpiece and insert the tail of the dog into the chuck or faceplate to keep the workpiece and center rotating together during operation (see Figure 36 for an example).

Dead Center

Lathe Dog

Figure 36. Example of using a dead center with

a faceplate and lathe dog.

When using a center in the spindle to mount a workpiece, the other end of the workpiece MUST be supported by a center installed in the tailstock quill to safely hold the workpiece in place during operation. Otherwise, the workpiece can be ejected from the lathe when the spindle rotates and could cause serious personal injury or property dam- age.

-30- Model G0554Z (Mfg 01/09+)