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Southbend SB1025 User Manual

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Page of 100
-62-
For Machines Mfg. Since 8/09
SB1024/SB1025/SB1026
TR O U B L E S H O OTI N G
Symptom
Possible Cause
Possible Solution
Tool slips in collect.
1.
Collet is not fully drawn into 
spindle taper.
1.
Snug up the drawbar to fully seat the collet.
2.
Wrong size collet.
2.
Use correct collect for tool shank diameter.
3.
Debris on mating surfaces of collet 
and spindle.
3.
Remove oil and debris from mating surfaces, then 
re-install.
4.
Excessive depth of cut.
4.
Decrease depth of cut and allow chips to clear.
Tool breakage.
1.
Spindle speed too slow/feed rate too 
fast.
1.
Use correct spindle speed and feed rate (Page 37).
2.
Tool getting too hot.
2.
Use coolant; reduce spindle speed/feed rate 
(Page 37).
3.
Excessive depth of cut.
3.
Decrease depth of cut and allow chips to clear.
Workpiece chatters 
or vibrates during 
operation.
1.
Table/saddle/knee locks not tight.
1.
Tighten all locks on mill that are not associated 
with necessary table movement for the operation.
2.
Workpiece not securely clamped to 
table or mill vise.
2.
Check that clamping is tight and sufficient for the 
operation; make sure mill vise is clamped tight to 
table.
3.
Tool not secure or is damaged.
3.
Properly secure the tool; replace if damaged.
4.
Spindle speed too fast/feed rate too 
slow.
4.
Use correct spindle speed and feed rate (Page 37).
5.
Gibs are too loose.
5.
Properly adjust gibs (Page 58).
Table hard to 
move.
1.
Table/saddle/knee locks are 
tightened down.
1.
Full loosen locks needed for movement.
2.
Chips have loaded up on the ways.
2.
Frequently clean away chips from the ways that 
build up during operation.
3.
Ways are dry and in need of 
lubrication.
3.
Use the one-shot oiler (Page 52).
4.
Gibs are too tight.
4.
Properly adjust gibs (Page 58).
Bad surface finish.
1.
Wrong spindle speed/feed rate.
1.
Use correct spindle speed and feed rate (Page 37).
2.
Dull/damaged tool; wrong tool for 
operation.
2.
Sharpen/replace tool; use correct tool for operation.
3.
Wrong spindle rotation direction for 
tool.
3.
Check for proper spindle rotation direction for tool.
4.
Workpiece not securely clamped to 
table or mill vise.
4.
Check that clamping is tight and sufficient for the 
operation; make sure mill vise is clamped tight to 
table.
5.
Gibs are too loose.
5.
Properly adjust gibs (Page 58).
Power feed chatters 
or grinds during 
operation.
1.
Brass bevel gear is not meshed with 
the drive gear.
1.
Remove parts from the power feed side of the 
longitudinal leadscrew to ensure the bevel gear is 
properly meshed; make sure the ball handle nut is 
tight.
2.
Power feed unit is at fault
2.
Replace.
!