Grizzly MODEL G0765 owner manual Lathe Operation

Lathe Operation

Symptom	Possible Cause		Possible Solution
Bad surface finish.	1.	Wrong spindle speed or feed rate.	1.	Adjust for appropriate spindle speed and feed rate.
	2.	Dull tooling or wrong tool selection.	2.	Sharpen tooling or select a better tool for the
				intended operation.
	3.	Tool height not at spindle centerline.	3.	Adjust tool height to spindle centerline (see Page
				38).
	4.	Too much play in gibs.	4.	Tighten gibs (see Page 57).
Tapered tool difficult	1.	Quill not fully retracted into tailstock.	1.	Turn quill handwheel until tapered tool is forced out
to remove from				of quill.
tailstock quill.	2.	Contaminants not removed from taper	2.	Clean taper and bore, then re-install tool.
		before inserting into quill.
Cross slide,	1.	Ways loaded with shavings, dust, or grime.	1.	Clean ways and relubricate.
compound rest, or	2.	Gibs are out of adjustment.	2.	Adjust gibs (see Page 57).
carriage feed has	3.	Handwheel loose or excessive backlash.	3.	Tighten handwheel fasteners, adjust handwheel
sloppy operation.				backlash to a minimum (see Page 56).
	4.	Leadscrew mechanism worn or out of	4.	Adjust leadscrew to remove end play (see Page
		adjustment.		56).
Cross slide,	1.	Ways loaded with chips, dust, or grime.	1.	Clean ways and lubricate.
compound,	2.	Gibs are too tight.	2.	Loosen gibs slightly (see Page 57).
or carriage	3.	Backlash setting too tight.	3.	Slightly loosen backlash setting (see Page 56).
handwheels hard to	4.	Bedways are dry.	4.	Lubricate bedways.
move.	5.	Half nut lever engaged.	5.	Disengage half nut lever for manual feeding.
Cutting tool	1.	Tool holder not tight enough.	1.	Check for debris, clean, and retighten.
or machine	2.	Cutting tool sticks too far out of tool holder;	2.	Re-install cutting tool so no more than 1⁄3 of the total
components vibrate		lack of support.		length is sticking out of tool holder.
excessively during	3.	Gibs are out of adjustment.	3.	Adjust gibs at affected component (see Page 57).
cutting.	4.	Dull cutting tool.	4.	Replace or resharpen cutting tool.
	5.	Incorrect spindle speed or feed rate.	5.	Use the recommended spindle speed and feed rate.
Workpiece is	1.	Headstock and tailstock not properly	1.	Re-align tailstock to headstock spindle centerline
tapered.		aligned.		(see Page 32).
Chuck jaws will	1.	Chips lodged in jaws or scroll plate.	1.	Remove jaws, clean and lubricate scroll plate, then
not move or do not				replace jaws.
move easily.

Model G0765 (Mfd. Since 12/13) -55-