RLL233 |
| Issue 4 Aug 2007 |
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Problem | Cause | Remedy |
3) Excessive drilling | Incorrectly | |
pressure required | worn or chipped cutter |
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| Coming down on swarf lying | Clean |
| on surface of | start a cut on swarf |
| Gibs out of adjustment or | Lubricate gib and/or adjust grub |
| lack of lubrication | screws |
| Swarf accumulated (packed) | Clear cutter |
| inside cutter |
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| Incorrect speed selection. | Select appropriate speed. |
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4) Excessive cutter | Steel swarf or dirt under | Remove cutter, clean part thoroughly |
breakage | cutter | and replace |
| Incorrectly | Always have a new cutter on hand to |
| worn cutter | refer to for correct tooth geometry, |
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| together with instruction sheet |
| Cutter skipping | See causes and remedies (2) |
| Tighten | |
| Cutter not attached tightly to | Retighten |
| arbor |
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| Insufficient use of cutting oil | Fill arbor with an oil of light |
| or unsuitable type of oil | viscosity and check to be sure oil is |
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| being metered into cutter when pilot |
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| is depressed. If not, check pilot |
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| groove and arbor internally for dirt or |
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| apply oil externally. Even a small |
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| amount of oil is very effective |
| Incorrect speed selection. | Select appropriate speed. |
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5) ) Excessive cutter | See cause and remedy above. |
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wear |
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| Incorrectly | Refer to instructions and a new cutter |
| cutter | for proper tooth geometry |
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| Use sufficient steady pressure to |
| Insufficient or spasmodic | slow the drill down. This will result |
| cutting pressure | in optimum cutting speed and chip |
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| load |
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