TABLE OF CONTENTS GEARS, SPLINES, AND CAMS Machinery's Handbook, 31st Edition
HYPOID AND BEVEL GEARING (Continued) 2266 Use of Table for Selecting Formed Cutters 2267 Offset of Cutter 2267 Adjusting the Gear Blank 2268 Circular Thickness, Chordal Thickness 2269 Steels Used for Bevel Gear WORM GEARING 2270 Standard Design for Fine-Pitch 2271 Formulas for Wormgears 2272 Effect of Production Method 2272 Materials for Worm Gearing 2273 Single-Thread Worm Gears 2273 Multi-Thread Worm Gears 2273 Worm-Gear Cutting HELICAL GEARING 2274 Helical Gear Calculations 2274 Rules and Formulas 2274 Determining Direction of Thrust 2275 Determining Helix Angles 2275 Pitch of Cutter to be Used 2278
OTHER GEAR TYPES Types of Ratchet Gearing Shape of Ratchet Wheel Teeth
(Continued) 2294 2295 2295
Pitch of Ratchet Wheel Teeth 2296 Module System Gear Design 2296 German Standard Tooth Form 2297 Tooth Dimensions 2298 Rules for Module System 2299 Equivalent Diametral Pitches, Circular Pitches CHECKING GEAR SIZES 2300 Checking External Spur Gear Sizes 2301 Measurement Over Wires 2305 Checking Internal Spur Gear 2314 Measurements for Checking Helical Gears Using Wires or Balls 2315 Checking Spur Gear Size by Chordal Measurement Over Two or More Teeth 2317 Formula for Chordal Dimension 2318 Checking Enlarged Pinions by Measuring Over Pins or Wires GEAR MATERIALS 2319 Classification of Gear Steels 2319 Use of Case-Hardening Steels 2319 Use of “Thru-Hardening” Steels 2319 Heat Treatment for Machining 2320 Making Pinion Harder 2320 Forged and Rolled Carbon Steels 2320 Forged and Rolled Alloy Steels 2321 Steel Castings for Gears 2321 Effect of Alloying Metals 2322 Sintered Materials 2322 Bronze and Brass Gear Castings 2323 Steels for Industrial Gearing 2324 Materials for Worm Gearing 2324 Non-Metallic Gearing 2325
Shafts at Right Angles, Center Distance Approximate Shafts at Right Angles, Center Distance Exact
2279 2282
Shafts at Any Angle, Center Distance Exact 2283 Selecting Cutter for Milling Helical Gears 2284 Milling the Helical Teeth 2285 Fine-Pitch Helical Gears 2286 Center Distance Without Backlash 2287 Change-Gears for Hobbing 2289 Helical Gear Hobbing 2289 Herringbone Gears 2289 General Classes of Problems 2289 Causes of Failures OTHER GEAR TYPES 2290 Elliptic Gears 2290 Planetary Gearing 2290 Direction of Rotation 2290 Compound Drive 2290 Planetary Bevel Gears 2291 Ratios of Epicyclic Gearing 2294 Ratchet Gearing
Power-Transmitting Capacity Safe Working Stresses
2325 2326 2326 2326
Preferred Pitch Bore Sizes Keyway Stresses
2327 Preferred Pitches 2327 Invention of Gear Teeth 2328 Calculating Replacement-Gear Dimensions
2202
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