![]() Needless to say, any DIY machine is not something to trust your business with. While ER11 is rather small, maxing out at 5/16" end mills, I mostly use this machine for prototyping in aluminum, so I can afford to take smaller depth-of-cut (DOC) and width-of-cut (WOC) at cost of time and material-removal-rate (MRR). I also purchased an imperial (.no metric in my shop) set of ER11 Collets. The trade-off here is that I can't run the spindle at low-speed for long periods of time, for fear of the system overheating. I opted for air-cooled (rather than water-cooled), to minimize the complexity of the set-up. Here's the exact setup I purchased: a 110V HuanYang Inverter with a "Changzhou Hua Jiang Electric Appliance Co., LTD" 1.5KW Air-cooled spindle. I'd been cutting the aluminum with the router for hundreds of hours before it gave out, but the low cost of Chinese spindles with accompanying Huanyang inverters finally became too lucrative. ![]() Then, my trusty Dewalt DWP611 Mounted to my largest CNC machine caught fire, leaving me to question my use of routers. tolerating their high-pitched whine in exchange for relative ease-of-use. I've been using routers on CNC machines for years.
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