Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 5.4, Problem 5RQ
Determine the minor diameter limits for the following threads using the Machinery’s Handbook:
a. ½-20 UNF 2B | upper: __________ |
lower: __________ | |
b. ¾-16 UNF 3B | upper: __________ |
lower: __________ | |
c. 1-8UNC2B | upper: __________ |
lower: __________ | |
d. 1 ¼-12 UNF 3B | upper: __________ |
lower: __________ |
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
What size of hole should be drilled for an internal M6 x 0.75 thread?
a.
5.75
b.
5.25
c.
5.5
d.
5.3
Thread Fits and
7. Define fit, allowance, tolerance, and limits.
8. How are external UNC threads classified?
9. Name and describe three classifications of UNC
fits.
10. How are thread fits designated for the ISO threads?
Classifications
11. Why was the ISO metric system of threads
adopted?
12. Describe a thread designated as M 56 X 5.5.
13. Name five thread forms used in North America and
state the included angle of each.
14. What are the principal differences between the
American and Unified threads?
A. PROBLEM ON TOPIC "KEYS AND COUPLINGS":
A coupling with material AISI C1045 as rolled transmits 65.5 HP at 1750 rpm. The material of the 1.75 inch shaft...
is also AISI C1045 as rolled and the key is cold drawn AISI C1020. N= 2.5. Determine the following:
1.
Size of bolt (dia.) if there are 6 bolts made of AISI C1045 as rolled at a bolt circle of 5 inches.
Note: Select standard bolt diameter from AT14 of DOME by Faires (see Lecture on fasteners for this Table)
Calculated Dia:
Standard Size to use:
2. Required b and t if a flat or rectangular key is used: Answer:
3. Required length of key, if a flat or rectangular key is used:
Note: Calculate for two type of stresses on key, then select your answer.
Length Based on shear
length Based on compression:
Length to use:
4. Required bif a square key is used: Answer:
5. Required length of key, if a square key is used:
Note: Calculate for two type of stresses on kev, then select your answer.
Length Based on shear
length Based on compression:…
Chapter 5 Solutions
Precision Machining Technology
Ch. 5.1 - List the four main parts of the engine lathe.Ch. 5.1 - What are the two main purposes of the lathe...Ch. 5.1 - What part of the lathe is used to set the feed...Ch. 5.1 - Prob. 4RQCh. 5.1 - Prob. 5RQCh. 5.1 - What is the purpose of the leads crew of a lathe?Ch. 5.1 - What two functions can the lathe tailstock...Ch. 5.1 - The standard taper in most lathe tailstocks is the...Ch. 5.1 - Define the swing and the bed length of a lathe.Ch. 5.2 - What is the special name for the type of jaw-type...
Ch. 5.2 - The most common variation of the above chuck has...Ch. 5.2 - Name two material shapes that can be properly held...Ch. 5.2 - List two advantages of using a self-centering...Ch. 5.2 - Name two material shapes that can be properly held...Ch. 5.2 - List three benefits of holding a workpiece between...Ch. 5.2 - List three potential advantages of using an...Ch. 5.2 - List three characteristics of a workpiece that...Ch. 5.2 - What type of mandrel would be ideal for gripping a...Ch. 5.2 - Name the type of tailstock center that raid be...Ch. 5.2 - What two auxiliary devices can be used to...Ch. 5.2 - Explain the differences between the two auxiliary...Ch. 5.2 - Name the device that is used to transmit the...Ch. 5.2 - Which two tool posts are the most efficient if...Ch. 5.2 - What is the major advantage of using...Ch. 5.2 - What direction is a right-hand turning tool...Ch. 5.2 - What is an inscribed circle related to carbide...Ch. 5.2 - Would a 0.010 or 0.031 tool nose radius be...Ch. 5.2 - Which device may be used for either toolholding or...Ch. 5.3 - If a 0.050" depth of cut is taken on the diameter...Ch. 5.3 - A lathe cross slide uses a diameter-reading...Ch. 5.3 - In what units are feed rates measured for lathe...Ch. 5.3 - Are deeper cuts used for roughing or finishing...Ch. 5.3 - Calculate spindle RPM and machining time for...Ch. 5.3 - List three safety precautions related to clothing...Ch. 5.3 - What two materials are most commonly used for...Ch. 5.3 - What feature of a lathe cutting tool has a direct...Ch. 5.3 - Is a left-hand or right-hand tool normally used...Ch. 5.3 - What part of the lathe is used to feed the tool...Ch. 5.3 - When facing, why should the tool not be fed past...Ch. 5.3 - Should a left-hand or right-hand tool be used when...Ch. 5.3 - When and how should chips he removed from the work...Ch. 5.3 - What are two reasons for center drilling on the...Ch. 5.3 - When drilling and reaming on the lathe, how are...Ch. 5.3 - How can hole depth be controlled during drilling...Ch. 5.3 - What are two reasons boring may be selected to...Ch. 5.3 - Why must extra care be taken when performing...Ch. 5.3 - How can a tap be aligned when threading a hole on...Ch. 5.3 - Briefly define form cutting.Ch. 5.3 - How do grooving and cutoff speeds compare to...Ch. 5.3 - How can tool binding be overcome when cutting deep...Ch. 5.3 - List the two basic knurl patterns.Ch. 5.3 - How is knurling different from other lathe...Ch. 5.3 - List and briefly describe the two different types...Ch. 5.4 - The distance of actual contact of two mating...Ch. 5.4 - What feature of mating threads determines the...Ch. 5.4 - How many classes of fit are there in the Unified...Ch. 5.4 - Determine the major diameter limits for the...Ch. 5.4 - Determine the minor diameter limits for the...Ch. 5.4 - Determine the pitch diameter limits for the...Ch. 5.4 - Determine the approximate compound-rest in-feed...Ch. 5.4 - What is the name for the rotating device that...Ch. 5.4 - When threading, what is the reason for feeding the...Ch. 5.4 - Prob. 10RQCh. 5.4 - Why should the depth of cut be reduced for each...Ch. 5.4 - What dimension of the thread is measured by using...Ch. 5.4 - What measuring tool is used to visually inspect...Ch. 5.4 - List two applications of Acme threads.Ch. 5.4 - What type of thread is machined on a tapered...Ch. 5.5 - Briefly define a taper.Ch. 5.5 - What is the difference between an included angle...Ch. 5.5 - What does TPI stand for in relation to tapers?Ch. 5.5 - What are the TPI and TPF of a part with end...Ch. 5.5 - What are the corresponding centerline and included...Ch. 5.5 - What is the corresponding centerline angle of a...Ch. 5.5 - What is the limitation of the tool bit taper...Ch. 5.5 - What must be known to use the compound-rest taper...Ch. 5.5 - What taper turning methods allow use of the lathes...Ch. 5.5 - What two steps can be taken to eliminate backlash...Ch. 5.5 - The TPI specified on a print is 0.030". If...Ch. 5.5 - If TPF is 0.42", how much movement should register...Ch. 5.5 - What is the benefit of using the offset tailstock...Ch. 5.5 - What are two ways to reduce uneven pressure on...Ch. 5.5 - Calculate tailstock setover for a 13.5" part with...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Determine the major diameter limits for the following threads using the Machinery's Handbook: a. -20 UNF 2A upper: _________________ lower: _________________ b. -16 UNF 3A upper: _________________ lower: _________________ c. 1-8UNC2A upper: _________________ lower: _________________ d. 1 -12UNF3A upper: _________________ lower: _________________arrow_forwardThe major function of a shafts in machines are as "Power and Torque" transmitting elements. Select one: O True O False A power of 2 kW has to be transmitted by a machine shaft connected to a spur gear. If the pinion has 32 teeth and the module is 4 mm. What should be the value of pitch circle diameter of the gear in mm. O a. 91.43 O b. 144.00 O c. 128.0 O d. 25.00 of a standard component on mass basis will reduces the total cost of production Development of deformation energy in the springs is due torsion loading alone. Select one: O True O Falsearrow_forwardWhat is the pitch of a M10 x 1.25 thread?arrow_forward
- What is the lead of a double cut thread when the pitch is 2.5 mm?arrow_forwardWhat is the TPI of a ½-20 thread?arrow_forward1. Name some uses of threads. Give an example of each. NOTE: Screw Thread – A screw thread may be visualized as a flexible form, like a piece of string that has been wrapped around a cylinder, or the sides of the cylindrical hole, at a uniform rate of advance, producing a form known as a helix. It may also be considered as a raised form produced on the outside of a cylinder, or on the inside walls of a cylindrical hole after a thread-cutting operation has been completed.arrow_forward
- Q-3 Three blocks A, B, and C and a grooved block D have dimensions a, b, c, and d as follows: a = 40.500 0.025 mm b = 52.000 0.075 mm c = 73.000 0.015 mm d = 165.900 0.250 mm Parts A, B, and C are standard parts supplied by vendors from the market, but we are to machine part D according to the the width that you are asked to specify. (a) Determine the mean gap w0 of w and its tolerance. (b) Determine the mean size of d (d0) that will assure that w ≥ 0.050 mm.arrow_forward1. What type of milling machine can be used to make the groove in the shaft?2. The diameter of the shaft is d = 25 mm. Find the width and depth of the groove (use the table below).3. Find the diameter of the tool.4. Find the speed of rotation (RPM N) of the tool during roughing and finishing.The material of the shaft is Stainless Steel (C45) with CARBIDE TOOL.arrow_forwardA 48-inch diameter saw blade is mounted on a pulley driven steel shaft; the required blade peripheral linear speed is 150 fps. Motor drive is 25 hp running at 1,200 rpm with a 6 inches diameter pulley. Determine the shaft rpm to attain the blade peripheral speed required. a. 716.2 c. 617.2 b. 761.2 d. 671.2 Determine the diameter of the shaft the motor requires. a. 3.162” c. 2.106” b. 1.186” d. 4.153” Determine the diameter of the pulley driving the steel shaft. a. 8.206” c. 6.409” b. 10.053” d. 4.605”arrow_forward
- What is the mechanical advantage of a 1/4" diameter screw with 20 threads per inch?arrow_forwardDon't Copy any wrong solution, Solve it fast within 20-30minutes. 1) A double threaded power screw is to raise a load of 70 kN. The screw has a pitch of 6 mm and turns at 60 rpm. Calculate the power output. a. 490 W b. 840 W c. 420 W d. 980 Warrow_forward21 The root of a thread is defined as what? Multiple Choice (select the best answer) The surface of the thread along the minor diameter. The surface of the thread along the major diameter. O The distance a screw travels axially with one rotation. O The measurement between the crest and root of a single thread. 22 The thread depth of a thread is defined as what? Multiple Choice (select the best answer) O The measurement between the crest and root of a single thread. O The number of threads which span one inch of an inch series thread. O The surface of the thread along the minor diameter. O None of the Above What operation finishes a hole to a precise size with a Multiple Cholce (select the best answer) 23 O Drilling Tapping Reaming None of the Abovearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Precision Machining Technology (MindTap Course Li...Mechanical EngineeringISBN:9781285444543Author:Peter J. Hoffman, Eric S. Hopewell, Brian JanesPublisher:Cengage Learning
Precision Machining Technology (MindTap Course Li...
Mechanical Engineering
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Cengage Learning
How to Measure Threads; Author: PracticalMachinist;https://www.youtube.com/watch?v=Uuy7EViS7Kc;License: Standard Youtube License