Precision Machining Technology (MindTap Course List)
2nd Edition
ISBN: 9781285444543
Author: Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher: Cengage Learning
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Textbook Question
Chapter 4.1, Problem 3RQ
Explain how the size of an upright drill press is determined.
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Chapter 4 Solutions
Precision Machining Technology (MindTap Course List)
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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- A drilling operation is to be performed with a 12.7 mm diameter twist drill in a steelwork part. The hole is a blind hole at a depth of 60 mm and the point angle is 118 ̊. The cutting speed is 25 m/min and the feed is 0.3 mm/rev. determine The cutting time to complete the drilling operation,arrow_forwardSketch a radial drilling machine? Explain the working, advantages and disadvantages of a radial drilling machinearrow_forwardWhat is a grinding lathe tool bits? Explain elaborately.arrow_forward
- Why is speed important in a drilling operation ? What are the results of a drill bit with unequal lips ? Why should you not hold work by hand when drilling ?arrow_forward1. A 7.5 -mm-diameter drill is used on a drill press operating at 300 rpm. If the feed is 0.125 mm/rev, what is the MRR? What is the MRR if the drill diameter is doubled? 2. Assume that the work piece material is high-strength aluminum alloy and the spindle is running at N = 500 rpm. Estimate the torque required for this operation.arrow_forwardCalculate the machining time required for making 60 holes on an MS plate of 80 mm thickness with a drillbit of diameter 20 mm with a cutting speed V= 40 m/min, the feed f = 0.2 mm/rev. (Assume approach length,A and over run O as 2mm and point angle as 110o). Calculate material removal rate.arrow_forward
- Is a #6 twist drill larger than a #16 twist drill? What is the diameter of both twisting screws?arrow_forwardCalculate the spindle speed for a Lathe Machine, if the cutting speed for a mild steel material workpiece is 34 m/min and the diameter of the cylindrical workpiece is 46 mm.arrow_forwardA 200 mm long magnesium alloy bar, 63 mm in diameter is turned on a lathe using a high speed steel cutter travelling at 180 mm/min. The spindle rotates at 450 rpm and lathe is equipped with a 10 kW motor, operating at a mechanical efficiency of 92%. The final diameter of the magnesium alloy bar is 59,5 mm. Indicate with a sketch the recommend size and location of the following tool angles: back rake, side rake, end relief, side relief and side and end cutting edge. Calculate the cutting time for the machining process.Calculate the required cutting force.arrow_forward
- Explain about GRINDING A LATHE TOOLS, elaborate. What are the recommendation in order to grind precisely?arrow_forwardHow is chamfering done in a lathe? Make an illustrationarrow_forwardIdentify and explain the method of milling process in which the stresses on the teeth is maximum at the end of the cut with neat diagram.arrow_forward
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