I'm currently designing a device and want to increase speed from 120 to 5,000 rpm. Device is lightweight, hand operated, free spinning, low torque in/out. Picture a cheap fertilizer spreader from Home Depot. They increase speed maybe 2 or 3:1, I'd like to up that to 40:1 or so.
I'm currently sketching a chain & sprocket, bevel gear set (need to redirect 90 degrees), and a spur set arrangement to achieve the increase, but wondering if there's a better/simpler way.
I'd like to use all off the shelf parts as I can't afford to custom design anything. I'd like to find an existing speed increaser, but and I've found are super heavy duty and will not work for my application.
This is a home project and I want to keep costs minimal, hence replacing gears with chain & sprocket to reduce cost. Interested to hear what ideas I may not be thinking of for this, thanks.