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Re: ANNOUNCING: CheapGears
Quote:
Originally Posted by Chak
Very nice! Why the 18.5* pressure angle though? Wouldn't that make the gears incompatible with most FRC gears, which has 20* and 14.5* pressure angles?
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Most gears, period. This is the first I've heard of an 18.5 degree pressure angle being used in any application. 20 degrees is more common in industry, though 14.5 was the standard for a very long time, and is still used in all COTS 20dp FRC gears I know of.
This is a subtle difference, and a lot of teams aren't going to realize why these gears aren't working with their current stock when they arrive, or if forced together, causing premature wear. I would wager that a significant number of students currently designing mechanisms have never heard of pressure angle because standardization has meant they've never had to learn about it for FRC purposes, and will assume that these are compatible with AM/Vex gears they already have. Which is a shame, because the price and selection is wonderful, and would help make custom geared systems more accessible to many teams.
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FIRST is not about doing what you can with what you know. It is about doing what you thought impossible, with what you were inspired to become.
2007-2010: Student, FRC 1687, Highlander Robotics
2012-2014: Technical Mentor, FRC 1687, Highlander Robotics
2015-2016: Lead Mentor, FRC 5400, Team WARP
2016-???: Volunteer and freelance mentor-for-hire
Last edited by Joe G. : 15-01-2017 at 20:57.
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