Find the Most Efficient Angle for Cutting 1/8" Polyurethane Rubber

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The most efficient angle for cutting 1/8 inch polyurethane rubber with a fixed cutting edge blade, such as a carpet cutting razor, is crucial for achieving clean cuts. Users are seeking recommendations for air-filled rubber-tired swivel casters in the 4 to 5-inch range. The discussion highlights the importance of blade angle in maximizing cutting efficiency. Participants are encouraged to share insights and experiences related to the cutting process and caster sourcing. The original poster has resolved their cutting angle issue and plans to share project images for further context.
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Most effecient angle...

for a fixed cutting edge blade such as a carpet cutting razor blade etc. to be cutting into 1/8 inch polyurathane rubber for cutting in half. Also, does anyone have an insiders guess as to where to get air filled rubber tired swivel casters around 4 to 5 inches? Any input would be awesome and appreciated. I will be putting up pictures of my small project to give you all a better idea of what I have going...
 
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Figured it out myself. Thanks a bunch folks.
 

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