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  1. 20-01-2021 #9
    magicniner's Avatar
    Lives in Rotherham, United Kingdom.
    magicniner
    Last Activity: 05-05-2024 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,021. Received thanks 230 times, giving thanks to others 42 times.
    I cut some polyurethane at 30000rpm with new, razor sharp 3 flute HSS cutters and oil free flood coolant (I've done some with air too), around 1mm DOC per pass, the parts were 10mm wide 1.5mm wall tyres for a steel tape labelling machine, they came out really nicely.
    There is no good, useful info out there on machining rubbers and polyurethanes, most of what has been offered is misleading or unhelpful, like "freezing" ;-)
    You think that's too expensive? You're not a Model Engineer are you? :D
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