DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 25, Problem 13RQ
To determine
The reason for havinggreater torque for deep hole.
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Chapter 25 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 25 - What functions are performed by the flutes on a...Ch. 25 - What determines the rake angle of a drill? See...Ch. 25 - Basically, what determines what helix angle a...Ch. 25 - When a large-diameter hole is to be drilled, why...Ch. 25 - Equation 25.4 for the MRR for drilling can be...Ch. 25 - Are the recommended surface speeds for spade...Ch. 25 - What can happen when an improperly ground drill is...Ch. 25 - Why are many drilled holes oversize with respect...Ch. 25 - What are the two primary functions of a...Ch. 25 - What is the function of the margins on a twist...
Ch. 25 - What factors tend to cause a drill to drift off...Ch. 25 - The drill shown in Figure 25.13 has coolant...Ch. 25 - Prob. 13RQCh. 25 - Why do cutting fluids for drilling usually have...Ch. 25 - How does a gang-drilling machine differ from a...Ch. 25 - Prob. 16RQCh. 25 - How does the thrust force vary with feed? Why?Ch. 25 - Holding the workpiece by hand when drilling is not...Ch. 25 - Prob. 19RQCh. 25 - In terms of thrust, what is unusual about the...Ch. 25 - Prob. 21RQCh. 25 - Prob. 22RQCh. 25 - What are the primary purposes of reaming?Ch. 25 - What are the advantages of shell reamers?Ch. 25 - A drill that operated satisfactorily for drilling...Ch. 25 - What precautionary procedures should be used when...Ch. 25 - What is the advantage of a spade drill? Is it...Ch. 25 - Prob. 28RQCh. 25 - Why does drill feed increase with drill size?Ch. 25 - Suppose you specified a drilling feed rate that...Ch. 25 - Suppose you wanted to drill a 1.5-in.-diameter...Ch. 25 - How much time will be required to drill the hole...Ch. 25 - What is the metal removal rate when a...Ch. 25 - If the specific horsepower for the steel in...Ch. 25 - If the specific power of an AISI 1020 steel of...Ch. 25 - Prob. 6PCh. 25 - Assume that you are drilling eight holes, equally...Ch. 25 - What machining difficulties should this process...Ch. 25 - Why were the distances between the holes too...
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- When roughing a pocket, should you machine in a clockwise or counterclockwise direction, and why?arrow_forwardWhat benefit does tapping on the drill press offer over hand tapping?arrow_forwardWhy is speed important in a drilling operation? What are the results of a drill bit with unequal lips?arrow_forward
- Read the sentences given below and Identify the correct statement. Sentence 1. The advantage of a self-centred chuck is that it is easy to work with. Sentence 2. The advantage of an independent chuck is that the work can be centred to high precision. Sentence 1 and 2 are true Sentence 1 is true None of the sentences are true Sentence 2 is truearrow_forwardExplain how the size of an upright drill press is determined.arrow_forwardwhat are the disadvantages or restriction(limitation) for a automated drilling processarrow_forward
- e) Explain the functions of drilling Stabilizers in drill string?arrow_forward11. With aid of neat sketches, explain the drilling parameters. 12. With aid of neat sketch, explain the main parts of the twist drill cutting tool. 13. With aid of neat sketch, explain the point angle of the twist drill. 14. With aid of neat sketch, explain what is the difference between the counter boring and counter sinking. 15. Define “NC" and "CNC" Terms.arrow_forwardWhat are two benefits of boring over other holemaking operations?arrow_forward
- 2. Discuss the difference between upright drilling machines with radial arm drilling machine with neat picture?arrow_forward1. What are the possible problems and difficulties of drill holes 2. What are the hazards of Drilling Machine 3. What are the three important things to keep in mind when using a drill press not including operator safety and clamping workarrow_forwardDraw and label the parts of an upright drilling machine. What type of operations can be performed on a drill press?arrow_forward
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