Milling; Drilling - Smithy GRANITE 1300 SERIES Operator's Manual

6. Too much backlash in the compound
Cause
• Loose spanner nuts
• Worn Nut
7. Machine slings oil from behind the chuck or in belt box
Cause
• Oil reservior overfilled
• Worn oil seal

Milling

1. Tool chatter
Cause
• Gibs too loose on cross slide,
compound, or carriage
• Unused feeds not locked
• Millhead not locked
• Quill too loose
• Tool not on center
• Improper tool shape, tool dull
• Feed too light or slow
2. Depth of cut is not consistent
Cause
• Quill moving
• Setup wrong

Drilling

1. Hole is off center or bit wanders
Cause
• Bit dull
• Bit not mounted correctly in chuck
• Bit bent
• Chuck loose in spindle
• Drawbar not secured
• Debris on spindle
• Bearing loose or worn
Solution
• Tighten spanner nuts
• Replace nut
Solution
• Check oil lever
• Replace felt in seal
Solution
• Readjust gibs
• Lock all axes but the one moving
• Lock millhead
• Tighten quill lock
• Center tool
• Reshape, sharpen, or replace tool
• Adjust feed rate
Solution
• Lock quill
• Make sure setup is parallel to
table
Solution
• Use sharp bits
• Remount tool
• Replace bit
• Remount chuck on arbor
• Tighten drawbar
• Clean debris and arbor and
remount tool
• Tighten or replace bearings
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12: Troubleshooting
12-4