This goods is five group of light and handy gears that is engineering plastic material,It's 1.6~2.5 transimission ratio. Very good used for DIY project(like a small mechanical motion device, application in toy and robot)
transmission smooth and steady.
It has 5 group high speed gears,different transmission ratio as follow:
2.5 : 1（32T+13T）
2.2 : 1 (31T+14T)
2.0 : 1 (30T+15T)
1.8 : 1 (29T+16T)
1.6 : 1 (28T+17T)
specially: They are pairs using with one to one
For any technical support or suggestion, please kindly go to our forum.