1. Ama-roller axhumene ngendlela emigwaqweni yomjaho, enamandla amakhulu okuthwala ama-radial, futhi afanele ukuthwala imithwalo esindayo nokushaqeka.

2. I-coefficient ye-friction incane, ifanele isivinini esikhulu, futhi isivinini esilinganiselwe siseduze nama-deep groove ball bearings.

3. Amamodeli we-N kanye ne-NU angahamba nge-axially, angakwazi ukuzivumelanisa nokushintsha kwesimo esihlobene se-shaft kanye nezindlu ngenxa yokwandisa okushisayo noma amaphutha okufaka, futhi angasetshenziswa njengokwesekwa kokuphela kwamahhala.Iringi yangaphakathi noma yangaphandle ingahlukaniswa ukuze ifakwe kalula futhi isuswe.

4. Izidingo zokucubungula ze-shaft kanye nembobo yesihlalo ziphakeme kakhulu.Ukuchezuka okuhlobene kwezimbazo zendandatho yangaphakathi nangaphandle ngemva kokufakwa kwe-abheri kumele kulawulwe ngokuqinile ukuze kugwenywe ukubangela ukugxilisa ingqondo kokucindezeleka kokuxhumana.

5.Amarola ayimigqa ekabili ene-taper engu-1:12 ngaphakathi kwebhore.I-radial clearance ingalungiswa futhi ukuqina kwe-radial kuphezulu, okufanele i-spindle yethuluzi lomshini.