bicycle mechanics and repair decal physics 98/198 spring 14 hubs and ball bearings
TRANSCRIPT
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Bicycle Mechanics and Repair DecalPhysics 98/198
Spring 14
Hubs and Ball Bearings
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1992 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Thinner, lighter, stronger, more accurately made and more expensive than parts made by other methods such as casting
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1992 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Gravity-cast parts are not as strong as cold-forged parts, although they are often indistinguishable by look.
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1992 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Melt-forged parts are not as strong as gravity-cast parts or cold-forged parts, but are still strong and affordable.
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1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Investment Casting
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1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
![Page 7: Bicycle Mechanics and Repair Decal Physics 98/198 Spring 14 Hubs and Ball Bearings](https://reader036.vdocuments.us/reader036/viewer/2022062518/56649d8a5503460f94a70071/html5/thumbnails/7.jpg)
1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
![Page 8: Bicycle Mechanics and Repair Decal Physics 98/198 Spring 14 Hubs and Ball Bearings](https://reader036.vdocuments.us/reader036/viewer/2022062518/56649d8a5503460f94a70071/html5/thumbnails/8.jpg)
1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Bulge-Forming (Hydoforming)
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1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
![Page 10: Bicycle Mechanics and Repair Decal Physics 98/198 Spring 14 Hubs and Ball Bearings](https://reader036.vdocuments.us/reader036/viewer/2022062518/56649d8a5503460f94a70071/html5/thumbnails/10.jpg)
1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
![Page 11: Bicycle Mechanics and Repair Decal Physics 98/198 Spring 14 Hubs and Ball Bearings](https://reader036.vdocuments.us/reader036/viewer/2022062518/56649d8a5503460f94a70071/html5/thumbnails/11.jpg)
1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Marin Bikes
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1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
Stamping
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1993 Bridgestone Cataloghttp://www.sheldonbrown.com/bridgestone/index.html
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Components - Hubs
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Hub Body
Axle
Locknut
Cone
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Cup
Axle
Bearings
Cone
Locknut
Hub Body
Quick Release Skewer
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←………!
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Types of Ball Bearings
Radial contact
Angular contact Four point contact
Axial contact
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Angled Contact Bearings
• Allows wheel to spin about axle
• Radial and lateral load bearing
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Hub BearingsCup and cone assembly
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Where Else Can We Find Bearings?
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Sealed Bearings
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Takes High Radial Force
Reduces Gunk Buildup on ball bearings
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• Axle rotates on bearings so they roll with as little friction as possible.• Bearings are sometimes sealed• Bearings should always be greased.• Always try to replace bearings when opening a hub, bottom bracket or headset. They are cheap!
http://mtobikes.com/tight-hubs/
http://www.sheldonbrown.com/gloss_an-z.html
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Tightening Cones