Description Model 30 Rigid Caster is a step up from the rigid casters shown on G15 Rigid Caster. These Rigid casters have bigger wheels, huge wheel bearings, a greater weight load rating, and a bigger mounting plate than the rigid caster that is shown on G15. It is designed to provide superior performance on both automated and hand powered equipment. The 30 Rigid Caster frames are zinc plated for prevention against rust. There are lubrication fittings for the wheel bearings. Rigids are usually attached to equipment at the opposite end of the push handle and where swivel casters are attached. This enables the person or employee pushing the equipment to be able to control the direction of travel. It should also be noted that rigids have 2 legs horizontal to the mount plate, stopping any kind of sideways moving. Equipment with 2 rigid casters and 2 swivel casters must be maneuvered into position. Capacity up to 7,000 pounds per caster. Model 30 features a large swivel and wheel bearing which allows for heavy loads and more arduous service. This caster is also available in 304 Stainless Steel as the SS-30 for wet or corrosive applications. For more info and help placing an order, contact us at 800-501-3808. Gray Iron caster wheels provide an economical option for light duty industrial applications. Unlike polyurethane or rubber wheels, these solid metal wheels cannot develop flat spots under standing loads. Caster City paints these wheels black and manufactures them with a lubrication fitting in the hub for easy maintenance. For applications where Ductile steel capacity is not needed, Gray Iron wheels offer budget-friendly performance. We offer Gray Iron caster wheels with a variety of bearing choices for optimal performance in different applications. These solid wheels deliver dependable service in normal operating conditions. Gray Iron caster wheels work well for light industrial tasks and manual material handling. Ideal for mail carts, office equipment movers, and light duty hand trucks.