All our polished steel or galvanised spindles are manufactured from cold drawn steel. Zinc-plated spindles are cut from galvanised, zinc-plated rod material, thus the front faces of the female threaded or spring-loaded spindles are always without zinc plating. Zinc-plated, male-threaded or flatted spindles of 12 mm diameter or greater are zinc-plated as a piece only after being processed. Corres ponding spindle versions with smaller crosssections are in these cases made only of stainless steel.
All spindles are sawn and milled so that the spindle ends obtain an optimum result. This avoids problems when mounting the rollers, such as those arising from deformed spindle ends that have been trimmed using scissors.
For threaded holes, the centring holes are made in an initial work step to ensure precision centring of the threaded hole in the spindle.
All spindles are sawn and milled so that the spindle ends obtain an optimum result. This avoids problems when mounting the rollers, such as those arising from deformed spindle ends that have been trimmed using scissors.
For threaded holes, the centring holes are made in an initial work step to ensure precision centring of the threaded hole in the spindle.
|
Spring-loaded spindle The spring-loaded spindle is the simplest type of spindle and is extremely easy and quick to fit and remove. The use of female threaded spindles results in a very stable frame construction as compared to spring-loaded spindle designs. The roller spindles and profiles stabilise each other, so compared with fitting loosely the rollers can be subjected to higher loads. Axial tolerances All conveyor rollers must be constructed with axial play. Chinabase recommends a total axial play of 1 mm, which is also already taken into account in the calculation of RL = EL - x mm with 2 x 0.5 mm. Female threaded spindle For rollers with female threaded spindles, the axial play results from the spindle protrusion beyond the roller body. Due to the additon of tolerances, the play of 0.5 mm per roller end depicted in the drawings cannot always be maintained in each case. However, an axial play that does not impair the function of the roller - if correctly installed and used - is guaranteed. The play of 0.5 mm per roller end should therefore only be used as a reference value. For conveyor profiles made of aluminium, the female threaded spindles should always be selected with the largest possible diameter and the smallest possible thread. This ensures that the front face of the spindle is so large that the spindle's penetration in the aluminium profile is reduced. |