# Collision Problem with Rotating Gears

**URL:** <https://forums.unrealengine.com/t/collision-problem-with-rotating-gears/477631>\
**Category:** World Creation\
**Tags:** collision-detection, collision-meshes, unreal-engine, Physics, Collision, delta-time, question\
**Created:** [January 22, 2021, 3:38pm UTC](https://forums.unrealengine.com/t/collision-problem-with-rotating-gears/477631 "2021-01-22T15:38:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Hikaribyakko](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Hikaribyakko](https://forums.unrealengine.com/u/Hikaribyakko)\
**Post date:** [January 22, 2021, 3:38pm UTC](https://forums.unrealengine.com/t/collision-problem-with-rotating-gears/477631/1 "2021-01-22T15:38:04Z")

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Hello everybody,

i need your help. i am using Nvidia-Flex Particels as Collision but it doesn’t work correctly. The gears are touching and affecting each other without being in Contact (visually). i did add “Get World Delta Secounds” to apply the Delta Time like in the picture.

 ![327819-ww.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/9/d/19d3235731bd1c53c6a1192cdc2c4a7ebf71580e.png)

But it doese not solve my Colision Problem. now i am trying to finde another solution to make My Gear rotate and affect the second gear correctly in spite of the Nvidia-Felx Collision.

 ![327818-gears.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/c/a/7ca0ba3b53f50a5395cb659460084dc027cc00e5.png)

Cordially