Grizzly G9249 owner manual Setting Feed Rate, Recommended Feed Rates, To set the feed rate

Setting Feed Rate

Feed rate is determined by the machined material, the type of tooling used, and by the desired finish. Refer the table in Figure 52 or the Machinery's Handbook for guidelines.

Note: These instructions are valid only for feed rod power feed. Feed rate configuration for thread- ing is discussed in the Threading subsection starting on Page 40.

Recommended Feed Rates

	Idda;ZZYGViZ>EG
Ldg`BViZg^Va	Rough Cuts	Finish Cuts
BV\cZh^jb	%#%&*¶%#%'*	%#%%*¶%#%&%
6ajb^cjb	%#%&*¶%#%'*	%#%%*¶%#%&%
7gVhh7gdcoZ	%#%&*¶%#%'*	%#%%(¶%#%&%
8deeZg	%#%&%¶%#%'%	%#%%)¶%#%%-
8Vhi>gdcHd[i	%#%&*¶%#%'*	%#%%*¶%#%&%
8Vhi>gdc=VgY	%#%&%¶%#%'%	%#%%(¶%#%&%
B^aYHiZZa	%#%&%¶%#%'%	%#%%(¶%#%&%
8VhiHiZZa	%#%&%¶%#%'%	%#%%(¶%#%&%
6aadnHiZZah=VgY	%#%&%¶%#%'%	%#%%(¶%#%&%
IddaHiZZa	%#%&%¶%#%'%	%#%%(¶%#%&%
HiV^caZhhHiZZa	%#%&%¶%#%'%	%#%%(¶%#%&%
I^iVc^jb	%#%&%¶%#%'%	%#%%(¶%#%&%
=^BV\VcZhZHiZZa	%#%&%¶%#%'%	%#%%(¶%#%&%

Note: These values are a guideline only. Refer to the MACHINERY’S HANDBOOK for more detailed information.

Figure 52. Feed rate table .

To set the feed rate:

1.Use the spindle direction lever to turn the spindle OFF, then allow the spindle to com- pletely stop before making gear changes.

2.Make sure the change gears are in the con- figuration 40T/127T/40T, as illustrated in

Figure 53 (refer to Change Gears on Page 38 for detailed instructions).

Note: The Model G9249 ships with the change gears in the 40T/127T/40T configu- ration, which will cover most feed rates and inch threading.

G9249  12" x 37" Belt Drive Gap Bed Lathe

3.Refer to the table in Figure 53 and find the value closest to your desired feed rate either in millimeters per revolution (top values) or in inches per revolution (bottom values).

Note: This table is also on the bottom of the label to the left of the feed rate selectors.

FEEDING TABLE mm/inch

401 2 3 4 5 6 7 8

127	D	.42	.37	.35	.33	.30	.28	.26	.24
		.0165	.0146	.0138	.0131	.0120	.0110	.0101	.0094
40	E	.210	.185	.175	.165	.150	.140	.130	.120
		.0082	.0073	.0069	.0065	.0060	.0055	.0050	.0047

Figure 53. Feed rate table.

4.Pull the knob of the feed rate selector and rotate it down. Line up the selector with the desired indent, rotate the selector up, and allow the pin to engage into the indent (see

Figure 54).

Note: It may be necessary to jog the spindle to facilitate movement of the selectors.

Letter Indents Number Indents

Figure 54. Feed rate selectors.

For Example: The operation is a shallow finish cut on an aluminum workpiece. The chart in Figure 52 recommends a feed rate of 0.005–0.100 IPR (inches per revolution). Because this is a shallow cut, we could select a feed rate of 0.0082 IPR. To set this feed rate, seat the left feed rate selector in the "E" indent, and the right selector in the "1" indent.

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