Student Workbook and Project Manual for Hoffman/Hopewell's Precision Machining Technology
3rd Edition
ISBN: 9798214105710
Author: Peter J. Hoffman and Eric S. Hopewell
Publisher: Cengage Learning US
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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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Students have asked these similar questions
Explain how does a basic drill press works. *
Identify 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.
2. Through hole of 12 mm diameter is to be drilled in a steel plate of 20 mm thickness, drilled spindle
speed is 20 m/min, feed 0.25 mm/rev and drill point angle is 120°, the amount of material removed
at the first 10 sec after full engagement of drill will be
mm/sec.
(a) 2300, (b) 2400, (c) 2500, (d) 2600, (e) 2700
Chapter 4 Solutions
Student Workbook and Project Manual for Hoffman/Hopewell's 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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- Handwritten solution recommended. (1) A twist drill bit is used to drill a hole of diameter 2.0 at 4578.1 rpm at a feed rate of 2.5 in/min. Calculate the MRR in in^3/min. Take "pi" = 3.14. Round your answer to the nearest tenth.arrow_forwardBriefly describe a gang drill press and its benefit.arrow_forward3. Through hole of 12 mm diameter is to be drilled in a steel plate of 20 mm thickness, drilled spindle speed is 20 m/min, feed 0.25 mm/rev and drill point angle is 120°, the amount of material removed at the first 10 sec after full engagement of drill will be .. (a) 2300, (b) 2400, (c) 2500, (d) 2600, (e) 2700 mm /sec.arrow_forward
- What are the Bench Drill Press OBJECTIVES/PURPOSE and its UNIT? note: specify the brandarrow_forwardA 12" through hole is to be drilled in a 1 inch thick steel plate. A standard twist drill having a nose angle of 120 degrees is to be used. The drill press is set to operate at a cutting speed of 20 feet per minute and a feed of 0.010 ipr. What is the machining time required to drill the hole?arrow_forwardDesign and draw a channel jig for mild steel components, as in figure below, to drill a hole of 18 mm.arrow_forward
- Sample Problem 1 A man create a 5 inches thick hole with a 2" diameter on an aluminum flat bar. Using a feed rate of 0.001 in/ rev with a drill spindle speed of 100 rpm. Calculate the following: a) Drill penetration speed in (in/min) b) Drilling time (min) c) Material Removal Rate (in? /min).arrow_forward5. Blind hole 20 mm diameter, 60 mm deep are being drilled in steel stock, drilling spindle speed is 500 rpm, feed 0.3 mm/rev, point angle of drill is 1180. Machining time ( in minutes ) per hole will be .. (a) 0.40, (b) 0.42, (c) 0.44, (d) 0.46, (e) 0.48arrow_forwardA 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_forward
- 1. 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_forwardThe cutting speed in in/min of a 12 mm drill operating at 600 rpm is nearly equal toarrow_forwardDrilling, diameter = 0.375 inches, feed is 0.003 inches/tooth, number of teeth is 2, rotation speed is 750 rev/min. Material is tough Copper alloy. Find: MRR, power at the motor, power at the tool, and torque at the tool. Work the problem in U.S. units and give the answers in U.S. units.arrow_forward
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