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These guides and questions explain advanced milling topics. Make sure you've completed 2.3 CNC Milling with BoXZY before moving on to these guides.

14 Questions View all

Changing end mills on CNC


I cant seem to install 1/8 x 1/8 x1/2 carbide end mill in the CNC router. Tried using the reduction brushes (RB-102 and RB-103) but both are too loose for the end mill.

Please help.

Thank you

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1 Answer

The RB-102 (1/4”OD to 1/8”ID) should be the right fit. Mines fits snuggly on a 1.8” bit, then I insert everything in router and away we go. Have you used calipers to measure your 1/8” bit. if it’s a cheap one maybe its misslabeled or just undersized.

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