Ball Bearings: Difference between revisions
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[[Image:loose_ball_bearings.jpg|Loose Ball Bearings]] | [[Image:loose_ball_bearings.jpg|right|Loose Ball Bearings]] | ||
'''Ball bearings''', aka ''BBs'', are just little metal balls. You can buy bearings from bicycle part [[distributors]] '''or''' from local bearing companies. | |||
== Sizes == | == Sizes == | ||
[[Image:SizingBallBearings.jpg|thumb|Sizing Ball Bearings with Ruler]] | [[Image:SizingBallBearings.jpg|thumb|Sizing Ball Bearings with [[Ruler]]]] | ||
The easiest way to determine the bearing size is by using a special [[ruler]]. The most common sizes are: | The easiest way to determine the bearing size is by using a special [[ruler]]. The most common sizes are: | ||
* '''1/4"''' Found in [[Rear Hubs]] and [[Bottom Brackets]] | * '''1/4"''' Found in [[Rear Hubs]] and [[Bottom Brackets]] | ||
* '''3/16"''' Found in [[Front Hubs]] | |||
Less common sizes: | |||
* '''7/32"''' | * '''7/32"''' | ||
* '''5/32"''' | * '''5/32"''' | ||
* '''1/8"''' | * '''1/8"''' | ||
== Grades == | == Grades == | ||
| Line 25: | Line 28: | ||
Starting with the highest quality and most expensive: | Starting with the highest quality and most expensive: | ||
# Ceramic | |||
# Stainless Steel | # Stainless Steel | ||
# Chrominum (Chrome) | # Chrominum (Chrome) | ||
# Carbon | # Carbon | ||
== See Also == | == See Also == | ||
* [[Park Tool SBC-1 Spoke Ruler]] | * [[Park Tool SBC-1 Spoke Ruler]] | ||
[[Category:Bicycle Parts]] | |||
[[Category:Shop supplies]] | |||
Latest revision as of 00:54, 23 November 2009
Ball bearings, aka BBs, are just little metal balls. You can buy bearings from bicycle part distributors or from local bearing companies.
Sizes
The easiest way to determine the bearing size is by using a special ruler. The most common sizes are:
- 1/4" Found in Rear Hubs and Bottom Brackets
- 3/16" Found in Front Hubs
Less common sizes:
- 7/32"
- 5/32"
- 1/8"
Grades
Bearings come in different Grades, the important thing to remember is quality and cost increase as the grade number gets lower, so 100 grade is better than 1000 grade. Grade 25 is the best you can buy, but you can use bearings all the way up to grade 800.
NOTE: Avoid mixing different kinds of bearings as they are made in batches, and bearings from the same batch work better together. It may be tempting to consolidate bearing containers when one gets low, but it is better to just let them run out.
Materials
Starting with the highest quality and most expensive:
- Ceramic
- Stainless Steel
- Chrominum (Chrome)
- Carbon