Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
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Textbook Question
Chapter 4.3, Problem 1RQ
List five drill press safety guidelines.
Expert Solution & Answer
To determine
The five drill press safety guidelines.
Explanation of Solution
The drill press machine is used to make hole in the workpiece with the help of a rotating machine tool.
An efficient drilling operation can be ensured by taking some precautions before and during the drilling operations.
The five drill press safety guidelines are as follows:
- During the drilling operation, the operator must use safety glasses.
- After the use of drift key, it must be removed from the spindle.
- One should not touch the spindle, drill, and chuck because they become hot during the operation.
- One must ensure that the spindle is stopped completely before adjusting the machine tool or workpiece otherwise the drill may break.
- One should clamp the workpiece before the operation otherwise it may break the tool or affect the size of hole in the workpiece.
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Problem 7.1
Part A
In (Figure 1), F₁ = 550 lb, F2 = 250 lb, and F3 = 340 lb.
Figure
F
F
B
Part B
Determine the shear force at point C.
Express your answer to three significant figures and include the appropriate units.
Vc=522
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lb
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Part C
Determine the moment at point C.
Express your answer to three significant figures and include the appropriate units.
1 of 1
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F
E
D
lb.ft
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Part D
6 ft-
4 ft-
4 ft-
6 ft
12 ft
Sketch h, for Problem 13.64
13
13.65 In Sketch i the tension on the slack side of the left pulley
is 20% of that on the tight side. The shaft rotates at 1000
rpm. Select a pair of deep-groove roller bearings to sup-
port the shaft for 99% reliability and a life of 20,000 hr.
Assume Eq. (13.83) can be used to account for lubricant
cleanliness. All length dimensions are in millimeters.
b
Z
02
0
y
200
500.
187
100
30°
B
TONE 500 diam
800 N
650 diam
100 N
Sketch i, for Problem 13.65
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Problem 2: Consider the rectangular wood beam below. Use E=1.0.
1. Determine the slope at A.
2. Determine the largest deflection between A and B.
Use the elastic curve equation. Show all work. (20%)
3 kN/m
A
2.4 m -
50 mm
AT
150 mm
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- B
C
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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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