●Idapangidwa kuti izitha kupirira zinthu zothamanga kwambiri
●Mumakhala mphete yooneka ngati washer yokhala ndi polowera mpira
● Mipira yokhomerera imakhala yokhazikika
● Iwo anawagawa lathyathyathya mpando mtundu ndi kudzikonda aligning mpira mtundu
● Kunyamula kumatha kunyamula katundu wa axial koma osati katundu wa radial