Product Description: Compared with the spur gear, helical gear has the following advantages: 1, tooth profile contact line is a slash, a pair of teeth gradually into engagement and gradually disengage, and it is smooth, low noise. 2, coincides with the larger, so the higher carrying capacity, smooth operation, suitable for high-speed transmission. 3, at least less than the minimum spur gear teeth. The main disadvantage of helical gears are helical force generated when the axial component, so that the bearing by the axial force. To overcome this shortcoming, you can use herringbone gears. Herringbone gears can be seen as the helix angle equal and opposite to the direction of the two helical gear merger, leaving the axial force due to symmetrical offset each other. Herringbone gear manufacturing drawback is more difficult and costly. Product link: http: //www.gdcxcd.com/productshow-37-36.html More Information: Automatic flat plane: http: //www.pingpao.cn belt sander: http: //www.jiahuayingfu. com feeding machine motor: http: //www.touerji.com heavy Generator: http: //www.fdjgxb.com water cutting: http: //www.xcsdqg.com electronic protective film: http: // www .dong-li.cn glass washing machine: http: //www.deyemachine.com sided heavy planing: http: //www.yapao.net micro motor chip: http: //www.gdzxxp.com copper art stairs aluminum Arts staircases, guardrails, copper staircase, carved copper art: http: //www.fsguanpai.net