Rivets are formed to fit into the countersunk holes of the rivet retaining plates & rivet rods. They conform to the German DIN 661 steel standard. Their length differs in relationship to the combined thickness of the plate, belt and rod.
Our tapered rivets facilitate rod mounting tremendously. Rivet retaining plates help to create the maximum sandwich compression effect of the belting and underside area of the rivet rod, yet designed to preserve belt flexibility. All our types are galvanization plated with a stamp coding. The first code number is the centre to centre distance of the rivet holes in millimeters, the second is the rivet diameter in millimeters, (e.g. 32-5.5). All rivet retaining plate holes are countersunk to accept the rivet head.
Large flat headed rivets, conforming to the German DIN 657 steel standard, perform very well in light duty conveyors. Rivet retaining plates are not needed with this kind of rivet. They can be used with any kind of belting also in higher load applications!
Flow drilled threaded plates (flow drill plates) are used in conjunction with M5 or M6 securing screws. They are used as an alternative fastening method using small ´Nylon’ self securing nuts. The screw´s head locates into the countersunk holes in the upper rod surface, the screw passes through the rod & belt and threads into the flow drill plate. The head has a socket wrench recess for screw tightening purposes. Excess screw length must be cut away or ground down so as not to conflict with the fingers of cage drive systems and roller surfaces.
Overlap belt joints fitted with flow drill plates is a good joint combination. Such flow drill plates may also be used when replacing rivet rods or on certain rods for a new belt assembly, e.g. where to retrofit flights etc. Flow drill plates reduce crop damage compared to the nut and bolt securing method. Half round nylon blocks may be fitted at the time of manufacture under a low profile belting type conveyor in place of rivet retaining plates. Their spacing controls agitation frequency. They lay 4 mm above the level of low profile belting. Normally they are only fitted to light duty sieving conveyors with 50 mm wide belting.