Bearings - Revision history

SpookySimon: /* Spherical Bearings and Rod Ends */ calling out broken link

2024-03-21T19:00:54Z

Spherical Bearings and Rod Ends: calling out broken link

FsaeIllumina: /* Pre-Selection: Type of Bearing */

2021-01-26T17:52:21Z

Pre-Selection: Type of Bearing

FsaeIllumina: /* Radial and Axial Bearings */ spelling

2021-01-26T17:36:45Z

Radial and Axial Bearings: spelling

FsaeIllumina: /* Tolerances and Fits */

2021-01-26T17:35:40Z

Tolerances and Fits

FsaeIllumina: /* Tolerances and Fits */

2021-01-26T16:13:38Z

Tolerances and Fits

FsaeIllumina: /* Tolerances and Fits */ Added SKF Bearing Select Tool Method

2021-01-26T16:12:31Z

Tolerances and Fits: Added SKF Bearing Select Tool Method

FsaeIllumina: /* Picking the Specific Size */

2021-01-26T15:54:35Z

Picking the Specific Size

FsaeIllumina: /* Radial and Axial Bearings */

2021-01-26T15:51:58Z

Radial and Axial Bearings

FsaeIllumina: /* Tolerances and Fits */

2021-01-26T15:42:18Z

Tolerances and Fits

FsaeIllumina: /* Tolerances and Fits */ added bolding

2021-01-26T04:47:48Z

Tolerances and Fits: added bolding

@@ Line 1: / Line 1: @@
 ==Spherical Bearings and Rod Ends==
 Used on the ends of suspension/steering tubes.
-* [http://www.aurorabearing.com/pdf/rod-ends.pdf Rod ends for racing]
+* [http://www.aurorabearing.com/pdf/rod-ends.pdf Rod ends for racing] <- broken link
 ===Suppliers===
 * Aurora Bearing

@@ Line 15: / Line 15: @@
 ====Pre-Selection: Type of Bearing====
 * The Schaeffler Pre-selection Chart on page 30 of the HR1 handbook<ref name=HR1/> provides a useful overview of the different types of bearings.
-* Ball bearings are usually lighter, can run at faster speeds, and are lower friction than roller bearings, but also have lower load capacity.
+* Ball bearings are usually lighter, can run at faster speeds, and are lower friction than cylindrical roller bearings, but also have lower load capacity. Deep Groove Ball Bearings can take some axial load (see section 1.6, Page 36 of HR1<ref name=HR1/>), while non-locating roller bearings cannot take any. There will always be small amounts of axial load on shafts from small misalignments, which is why deep groove ball bearings are so common.
-* Single row deep groove ball bearings come with different sized balls (and corresponding weights and sizes). From smallest to largest: 618XX, 619XX, 60XX, 62XX, 63XX.
+* Single row deep groove ball bearings come with different sized balls (and corresponding weights and sizes). From smallest to largest: 618XX, 619XX, 60XX, 62XX, 63XX. See section 1.2, page 216 of HR1<ref name=HR1/>.
 * Suggestions from a FS Wiki Author of what teams could use:
 ** Bellcranks: Deep groove ball bearings
 ** Steering: Deep groove ball bearings, or needle bearings (in areas with 0 axial force)
-** Drivetrain (such as differential mounting): deep groove ball bearings or roller bearings
+** Drivetrain (such as differential mounting): deep groove ball bearings or roller bearings. Note that at least one bearing will have to be able to take the small axial load.
-** Wheel Hubs: Angular Contact ball bearings or tapered roller bearings in an X or O configuration, Or buy an off-the-shelf wheel hub.
+** Wheel Hubs: Angular Contact ball bearings or tapered roller bearings in an O configuration, Or buy an off-the-shelf wheel hub.
 ====Picking the Specific Size====

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 ==Radial and Axial Bearings==
-Used on shafts. Radial Bearings are very common in Formula Student, which Axial bearings are rare. Typical unit has a hollow cylinder shape, with spherical balls or cylindrical rollers inside.
+Used on shafts. Radial Bearings are very common in Formula Student, while Axial bearings are rare. Typical unit has a hollow cylinder shape, with spherical balls or cylindrical rollers inside.
 ===Suppliers===

@@ Line 30: / Line 30: @@
 ===Tolerances and Fits===
 ====SKF Bearing Select Tool Method====
 # Go to [https://www.skfbearingselect.com SKF Bearing Select Tool] Website.
@@ Line 40: / Line 41: @@
 # On the Fits and Tolerances page, set "Standard fit recommendation" to ON.
 ====Schaeffler HR1 PDF Method====
-Section 8.3 of the Schaeffler HR 1 Handbook<ref name="HR1"> https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf</ref> is the best available source. Since bearings are standardized across suppliers, Schaeffler's catalogue is relevant for all manufacturers.
+Follow section 8.3 of the Schaeffler HR 1 Handbook<ref name="HR1"> https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf</ref>.
 # Search for the supplier part number on a supplier's catalogue like [https://medias.schaeffler.us/ Schaeffler's Medias Catalogue]. Bearings have standardized supplier part numbers across all suppliers, so it will be the same part number on SKF or NSK's website as well. Searching without the suffix for the seals (ie. "-ZZ" or "-2RS1") will improve the chances of at least finding the bearing of the correct size.

@@ Line 31: / Line 31: @@
 ===Tolerances and Fits===
 ====SKF Bearing Select Tool Method====
-# Go to [https://www.skfbearingselect.com]
+# Go to [https://www.skfbearingselect.com SKF Bearing Select Tool] Website.
-# Select Roller Bearing (This includes deep groove ball bearings)
+# Select Roller Bearing (This includes deep groove ball bearings).
-# Pick Single or Two on a Shaft
+# Pick Single or Two on a Shaft.
 # Pick the Bearing type in the drop down, then in the "Search Designation" type in the supplier part number, such as "608" or "6005", then hit next.
 # Enter in the loads.

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 Suppliers have helpful tools. Can also use the Schaeffler HR 1 handbook.<ref name="HR1"/>
 * [https://www.skf.com/group/products/rolling-bearings/principles-of-rolling-bearing-selection/bearing-selection-process SKF Bearing Selection Tool]
 * [https://medias.schaeffler.com/medias/la/start.do?property&lang=en&mediasS=bX-eGEFcBXnh&mediasCall Schaeffler Bearing Selection Tool]

@@ Line 9: / Line 9: @@
 ===Suppliers===
-* Schaeffler (Includes FAG, and INA)
+* Schaeffler (Includes FAG, and INA) [https://medias.schaeffler.us Schaeffler Catalogue]
 * NSK
-* SKF
+* SKF [https://www.skf.com/us SKF Catalogue (just use search)]
 ===Bearing Selection===
 ====Pre-Selection: Type of Bearing====

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 ===Tolerances and Fits===
-Section 8.3 of the Schaeffler HR 1 Catalogue<ref name="HR1"> https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf</ref> is the best available source.
+Section 8.3 of the Schaeffler HR 1 Catalogue<ref name="HR1"> https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf</ref> is the best available source. Since bearings are standardized across suppliers, Schaeffler's catalogue is relevant for all manufacturers.
 # Search for the supplier part number on a supplier's catalogue like [https://medias.schaeffler.us/ Schaeffler's Medias Catalogue]. Bearings have standardized supplier part numbers across all suppliers, so it will be the same part number on SKF or NSK's website as well. Searching without the suffix for the seals (ie. "-ZZ" or "-2RS1") will improve the chances of at least finding the bearing of the correct size.
 # The catalogue page for the specific bearing (like Schaeffler's Medias) should state the '''basic dimensions, and min/max radii of the housing''' etc. It may not contain the tolerances.
 # In section 8.2-8.3 (pg 145) of the Schaeffler HR1 handbook<ref name="HR1"/> there will be '''tolerance info for the housing and shaft'''.  Start with Table 1 to determine the loading condition. Then for radial bearings (the most common type) look at Table 2 for the shaft tolerance, and Table 4 for the housing tolerance.
-# In the same Schaeffler HR1 handbook<ref name="HR1"/>, Section 8.6 has the more advanced '''GD&T''' (Table 10, Assume a bearing tolerance class "Normal"), then Table 11 has the '''surface roughness tolerance''' (The diameter tolerance grade is from 4th column of Table 10).
+# In the same Schaeffler HR1 handbook<ref name="HR1"/>, Section 8.6 has the more advanced '''GD&T''' (Table 10). To use Table 10, look up the Bearing Tolerance Class from the catalogue page specific to the bearings (from step 1 in this wiki guide), or just assume it's "normal 6X" or "PN", then Table 11 has the '''surface roughness tolerance''' (The diameter tolerance grade is from 4th column of Table 10).
 =====Tolerances note: =====