Grizzly g0746, g0749 owner manual Power Feed, Configuration Example

Configuration Example

Figure 73 shows the levers positioned for a spindle speed of 24 RPM.⁜

Note: If the spindle speed levers do not easily adjust into position, rotate the spindle by hand while you apply pressure to the lever. When the gears align, the lever will easily move into place. If you have trouble rotating the spindle by hand, you can use the spindle key or a chuck key to get additional leverage—be sure to remove the key when you are done.

		Spindle Range			Spindle
			Lever		Speed Lever
		Spindle		Spindle Speed
		Range Lever		Lever Set To
		Pointing Up		“E” (24 RPM)
					E
		A	B	C	D	E
		1600	545	240	105	45
X	min	1150	395	175	75	33
		845	290	130	55	24

Figure 73. Setting the spindle speed to 24 RPM.

Power Feed

Both the carriage and cross slide have power feed capability when the carriage is engaged with the feed rod. The rate that these components move per revolution of the feed rod is controlled by the quick-change gearbox lever and dial positions and the end gear configuration.

The feed per revolution and the spindle speed must be considered together—this is the feed rate. The sources you use to determine the opti- mum spindle speed for an operation will also provide the optimal feed to use with that spindle speed.

Often, the experienced machinist will use the feeds and speeds given in their reference charts or web calculators as a starting point, then make minor adjustments to the feed rate (and some- times spindle speed) to achieve the best results.

The carriage can alternately be driven by the leadscrew for threading operations. However, this section only covers the use of the power feed option for the carriage and cross slide compo- nents for non-threading operations. To learn how to power the carriage for threading operations, refer to Threading on Page 57.

If the feed selection lever and the half nut are engaged at the same time, machine damage could occur. Even though there is a lock-out device to prevent this, it could break if forced.

-52- Model G0746/G0749 (Mfg. Since 3/13)