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CONTENTS
SCREW THREADS
Cutting Screw Threads
Stud and Lead Screw Gears on Lathe
Examples in Finding Gears in Screw Cutting
Cutting Fractional Threads
Diagram of Simple and Compound Gearing for Screw Cutting.
Condensed Rules for Screw Cutting
Gears for Screw Cutting
Following the Motion of the Train of Gears
Effect of Compound Gearing in the Train
A Screw Thread Angle Table
Side Clearance of the Tool for Thread Helix
Formulas for Finding the Angle of Helix
Use of the Protractor in Getting the Side Clearance on the
Tool
Multiple
Thread Cutting
Table of Distances to Move Carriage in Multiple Thread
Cutting
Opening and Closing the Lead Screw Nut
Face Plate for Multiple Thread Cutting
Cutting Diametral Pitch Worms in the Lathe
Table of Change Gears for Diametral Pitch Worms
Examples in Finding Gears for Worm Cutting.
The Brown & Sharpe 29-degree Worm Thread and the Acme
29° Screw Thread
Full Size Sections of B. & S. Worm and Acme Screw Threads, 1-inch Pitch
Measurements of V Tools
The Gear Tooth Caliper as Used for Thread Measurements
Table for V Tool Angle Measurements
Grinding the Flat on Thread Tools
Table for Grinding Flat on Tools for U. S. Form of Thread
Standard Proportions of Screw Threads
Table of United States Standard Screw Threads
Table of Sharp "V" Standard Screw Threads
Table of Whitworth Standard Screw Threads
Table of British Association Standard Screw Threads
Table of French (Metric) Standard Screw Threads
Table of International Standard Screw Threads
Table of Acme 29-degree Standard Screw Threads
Table of Acme 29 degree Tap Threads
14, 15
16
17
18
19
20
21
22
Measuring Screw Threads
B. & S. Screw Thread Micrometer Readings for U. S. Threads
B. &. S. Screw Thread Micrometer Readings for Sharp "V”
Threads
B. &. S Screw Thread Micrometer Readings for Whitworth
PAGE
24
25
26
Explanation of Screw Thread Micrometer Caliper
Measuring Thread Diameters with Micrometer and Wires
Measuring Threads of Special Diameter
26, 27
27
Formulas for U. S. Thread Measurement with Micrometer and
Wires
Table for U. S. Thread Measurement with Micrometer and
Formulas for Sharp "V" Thread Measurement with Microm-
eter and Wires
Table for Sharp "y" Thread Measurement with Micrometer
and Wires .
Formulas for Whitworth Thread Measurement with Microm-
Table for Whitworth Thread Measurement with Micrometer
and Wires.
Measuring Fine Pitch Screw Threads with Micrometer and
Constants for 3-wire and Micrometer System of Measuring
Measuring Acme 29-degree Screw and Tap Threads with Mi-
crometer and Wires
Table of Wire Sizes for Measuring Acme 29-degree Screw and
Tap Threads
Brown & Sharpe 29-degree Worm Thread Formulas
Table of B. & S. 29-degrees Worm Thread Parts
Measuring B. &. S. 29-degree Worm Thread with Microm-
Table of Wire Sizes for Measuring B. & S. 29-degree Worm
Worm Wheel Hobs
38
35
36
34
30
29
PIPE AND PIPE THREADS
Briggs Standard Pipe Threads
39
Taper of Pipe End and Form of Thread in the Briggs System.
Longitudinal Section of Pipe Thread
Perfect and Imperfect Threads
Dimensions of Wrought Iron Welded Tubes, Briggs Standard
Whitworth Pipe Sizes and Threads
Table of Tap Drill Sizes for Briggs and Whitworth Pipe Taps.
The Pipe Joint in the Briggs System.
Relation of Reamer, Tap, Die and Gages in the Briggs System
Forming the Joint in the Briggs System
Table of Diameters, Thread Lengths, Gaging Dimensions, etc.,
in the Briggs Joint
Gage Sets for Briggs Pipe and Fittings
Briggs Standard-, Working Allowance-, and Inspection
Allowance Gages
Relation and Application of the Gages
National Standard Hose Coupling Dimensions
TWIST DRILLS AND TAPS
45
Dimensions of Machine Screw Taps, old Standard
Dimensions of Machine Screw Taps, A. S. M. E.
Dimensions of Hand Taps.
Dimensions of Taper Taps
62
63
64
65
Dimensions of Pipe Taps
66
Dimensions of Stove Bolt Taps
Dimensions of Taper Die Taps
67
Dimensions of Sellers Hobs
68