Bearing loads for roller skates or skateboards

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SUMMARY

This discussion focuses on determining load ratings for deep groove roller bearings used in roller skates. The proposed calculation involves a static load of 100kg multiplied by 9.8 m/s², divided by 4, accounting for two bearings per wheel and potential landing impacts. The axial load is estimated to be 25% of the radial load rating. Additionally, participants emphasize the importance of considering significant shock loading during jumps and hard landings, which can greatly exceed static load values.

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  • Understanding of load calculations in mechanical engineering
  • Familiarity with deep groove roller bearings specifications
  • Knowledge of static vs. dynamic load concepts
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Engineers, product designers, and hobbyists involved in roller skate or skateboard manufacturing, particularly those focused on optimizing performance and durability under load conditions.

adamjbradley
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I'm trying to determine load ratings for a deep groove roller bearing for use in a roller skate. I suspect I'll be looking at 100kg x 9.8N / 4 (2 bearings per wheel, likely only every to have a single set of wheels, front or back - 4 bearings - on the ground) * 2 (but this could be a landing!) for the Radial and I *think* Axial load should be 25% of that rating.

Any thoughts? Thanks in advance!

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Shock loading will be significant for jumps with hard landings .
 
That will do for the static load but the dynamic load can be much, much greater:



(your units don't make sense by the way, the 9.8N should be 9.8 m/s2 )
 

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