Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
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Textbook Question
Chapter 4.3, Problem 8RQ
Briefly contrast the speed and feed differences between drilling and reaming operations.
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Chapter 4 Solutions
Precision Machining Technology
Ch. 4.1 - Upright drill presses are available in _______ and...Ch. 4.1 - List two general types of upright drill press...Ch. 4.1 - Explain how the size of an upright drill press is...Ch. 4.1 - Briefly describe the term sensitive drill press.Ch. 4.1 - Briefly describe a gang drill press and its...Ch. 4.1 - When would a radial-arm drill press most likely be...Ch. 4.1 - Briefly describe a micro drill press and its...Ch. 4.2 - What are the two main materials used to make...Ch. 4.2 - What two types of shanks are commonly found on...Ch. 4.2 - Name three functions of the flutes on a twist...
Ch. 4.2 - Name two types of flute styles for machine...Ch. 4.2 - Prob. 5RQCh. 4.2 - What is the major difference between counterboring...Ch. 4.2 - What must be used to secure a workpiece to an...Ch. 4.2 - What devices are used to elevate a workpiece to...Ch. 4.2 - If 50 parts measuring 1" I" 3" each needed a...Ch. 4.2 - Which would be the best workholding device for...Ch. 4.2 - Which would be the best workholding device for...Ch. 4.2 - Which would be the best workholding device for...Ch. 4.3 - List five drill press safety guidelines.Ch. 4.3 - Briefly define the term cutting speed.Ch. 4.3 - What unit of measure is used to define cutting...Ch. 4.3 - What is feed, and how is feed stated for drill...Ch. 4.3 - Briefly describe two methods for locating hole...Ch. 4.3 - What is spotting and why is it performed?Ch. 4.3 - What is pecking, or peck drilling?Ch. 4.3 - Briefly contrast the speed and feed differences...Ch. 4.3 - What drill press component can be used to control...Ch. 4.3 - Calculate feed depth for a 90-degree countersink...Ch. 4.3 - Calculate feed depth for an 82-degree countersink...Ch. 4.3 - What benefit does tapping on the drill press offer...Ch. 4.3 - How many turns must a 1/4-20 tap be turned into a...Ch. 4.3 - Prob. 14RQ
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- Draw and label the parts of an upright drilling machine. What type of operations can be performed on a drill press?arrow_forwardDecrease of the cutting feed (Vf) in drilling leads to: a/Harder chip evacuation b/Harder chip breaking c/Better surface finish in the machined holearrow_forwardWhich of the below is true for conventional milling: Chips are removed behind the cutter which reduces the chance of re-cutting Chip width starts from zero and increases which causes more heat to diffuse into the workpiece and produces work hardening O Creates cleaner shear plane which causes the tool to rub less and increases tool lifearrow_forward
- Briefly describe the meaning of spark gap in wire cut machining by drawing a sketch.arrow_forwardb. A drilling operation is to be performed with a 13 mm diameter HSS twist drill on a mild steel workpiece that has an overall thickness of 80mm. The hole is to be drilled to a depth of 65 mm. The recommended cutting speed is 0.42 m/s and the feed is 0.30 mm/rev. i) What is the typical point angle of such a drill? ii) Determine the cutting time to complete the drilling operation.arrow_forwardQ1\ a) The operation of drilling is to be done with a 25.4 mm ( diameter) twist drill in a brass workpiece. The hole is a blind-hole with the point angle = 118°, and a depth of 50 mm . The speed of 25 m/min, feed of 0.25 mm/rev. Calculate: (1) the time of cutting to complete the drilling operation, and (2) metal removal rate during the operation.arrow_forward
- What are two reasons boring may be selected to produce a hole instead of drilling and reaming?arrow_forward6q Read the sentences given below and Identify the wrong statement. Sentence 1. The advantage of an independent chuck is that the work can be centered to high precision. Sentence 2. The advantage of an independent chuck is that it is easy to work with. Sentence 2 is False None of the sentences are False Sentence 1 is False Sentence 1 and 2 are Falsearrow_forwardWhat are the Bench Drill Press OBJECTIVES/PURPOSE and its UNIT? note: specify the brandarrow_forward
- A 0.4-inch diameter bit is used in a vertical or vertical drill that operates at 300 rpm. If the feed is 0.005 in / rev, what is the MRR? What is the MRR if the drill diameter is doubled? What is the power required in the drill if the material is an annealed AISI 1080?arrow_forwardRead 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_forwardA turning operation uses a 2/64 in nose radius cuttingtool on a free machining steel with a feed rate = 0.010in/rev and a cutting speed of 300 ft/min. Determine thesurface roughness for this cut.arrow_forward
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