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Questions and Answers
What is the depth-to-diameter ratio used for?
What is the depth-to-diameter ratio used for?
- Determining if it is deep-hole drilling (correct)
- Increasing hole accuracy
- Reducing tool life
- Measuring the diameter of the drill
What are gundrills typically made of?
What are gundrills typically made of?
- Cast iron
- Brass
- Alloy-steel-tubing shank with a solid carbide or carbide-edged tip (correct)
- Stainless steel
What is the purpose of a taper shank on drills?
What is the purpose of a taper shank on drills?
- To hold the drill in a taper in the end of the machine tool spindle (correct)
- To increase the drilling speed
- To reduce the depth-to-diameter ratio
- To deliver cutting fluids to the cutting edge
When are gang-drilling machines often used?
When are gang-drilling machines often used?
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What is the major feature of a gundrill?
What is the major feature of a gundrill?
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What has resulted in improved hole accuracy, longer life, self-centering action, and increased feed-rate capabilities in recent years?
What has resulted in improved hole accuracy, longer life, self-centering action, and increased feed-rate capabilities in recent years?
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What can happen if a high-speed steel (HSS) drill is not reground properly after wear?
What can happen if a high-speed steel (HSS) drill is not reground properly after wear?
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What is required to hold straight-shank drills with sizes up to 3/8 -in. diameter?
What is required to hold straight-shank drills with sizes up to 3/8 -in. diameter?
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What can accelerate early tool failure and degrade the hole-drilling process?
What can accelerate early tool failure and degrade the hole-drilling process?
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What type of drills are usually used for sizes up to 3/8 -in. diameter?
What type of drills are usually used for sizes up to 3/8 -in. diameter?
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