Potential
Problem |
Possible Cause
|
Remedy
|
Drill Chuck hard
to adjust |
Chuck is sticking Chuck is corroded Internal gears are broken |
Apply graphite Replace chuck Replace chuck |
Chuck wobbles |
Chuck loose on spindle Defective chuck |
Tighten chuck setscrew Replace chuck |
Bit wanders,
resulting in
off-center hole |
Bit dull Bit loose in chuck Bit not aligned Nylon drive is worn Bit bent Chuck loose on spindle Main spindle bent
Quill bearing worn |
Sharpen bit Tighten Chuck jaws Align bit Replace nylon drive Replace bit Tighten chuck setscrew Replace sindle
(factory job) Replace quill bearing
(factory job) |
Entrance of hole
is ragged |
Bit dull Wrong type of bit |
Sharpen bit Switch to proper type of bit for the job |
Exit of hole
is ragged |
Workpiece is not properly backed-up during drilling Bit dull Wrong type of bit |
Use scrap block back-up
Sharpen bit Switch to proper type of bit for the job. |
Hole sides
are ragged |
Bit dull Wrong type of bit |
Sharpen bit Switch to proper type of bit for the job. |
Hole too big |
Wrong size bit Stock notsceured during
drilling Bit bent Main spindle bent |
Change to correct size bit Clamp stock into position defore drilling Replace bit Replace main spindle
factory job) |
Hole too deep
or too shallow |
Depth stop control
improperlyset Depth stop control not properly locked Depth stop control broken
Rip fence or miter gauge back-up slipped during drilling Chuck loose on spindle Carriage, table or headstock not locked |
Set depth stop control
properly Tighten the depth stop control handle Replace depth stop control mechanism Secure rip fence and/or miter gauge and try again Tighten chuck setscrew Lock carriage, table and/or headstock in position |
