For higher viscosity coatings, double wound rods reduce clogging and eliminate lines. By winding a smaller wire on top of a larger one (see image) the cavity created is wide and shallow allowing heavy coatings to flow better. A smaller top wire creates a smaller interruption in the coating flow enabling the coating to wet out more completely. While a double wound rod is more expensive than a gapped rod, it is also more durable.
For higher viscosity coatings, gapped rods reduce clogging and eliminate lines. By winding a smaller wire with spacing (see image) the cavity created is wide and shallow allowing heavy coatings to flow better. A smaller wire creates a smaller interruption in the coating flow enabling the coating to wet out more completely. While a gapped rod is less durable than a double wound rod, it is also less expensive.
The standard formed rod profile closely resembles a wire wound rod with the same pitch and peak radius. The wide, shallow grooves of an HD profile can accommodate higher viscosity coatings (similar to double wound & gapped rods). The XLR profile features flat topped peaks that dramatically increase the wear resistance of the rod - extending rod life. Give us a call to discuss a custom profile for your application.