... ,15mm 20mm 17mm, 20mm 20mmThickess1.21.2,1.5,2.02.5,3.03.03.0,3. ... , medium duty, heavy duty2.applicable conveyor type (1)driven roller (2)gravity roller3.applicable situation indoor convey4. advantages1 ... can bear more axial force. Even if the pin is un-used, roller still do not fail ... design request, please contact our technical department.2)Female thread mounting wayRollers are connected with frame ...