Medium Duty Casters

Medium duty casters sit between light and heavy: the casters for loaded trolleys, line-side racking, workbenches under real load, and machine-adjacent equipment, with 2 to 8 inch wheel sizes and ratings from 30kg to 160kg per wheel. The line is built on the Sumatic 01 and 011 series forks, predominantly in TPR and TPU wheel compounds.

The selection rule is unchanged: maximum loaded weight divided by the number of casters, times a 2.5 safety factor for swivel casters on hard floors. A 300kg loaded trolley on four casters needs a 188kg rating, which pushes past this line into heavy duty; a 250kg trolley runs on 5-6 inch casters at 100-160kg. A 120kg workbench fits 4-5 inch casters at 30-80kg. Check the per-wheel table on each product page, because the rating falls when only two casters are swivel.

TPR is the default compound in this class: quiet, low rolling resistance, no marks on painted or resin floors, and low push-back force that staff feel on every push. TPU wheels are the upgrade for high-cycle routes and areas with forklift or pallet traffic, where abrasion resistance matters more than silence. Where a medium duty trolley works outdoors or on dock edges, check the load table before ordering and consider stepping up a wheel size.

Mounting is predominantly top plate with 2 or 4 holes for fast field replacement; threaded stem casters (M10-M16) appear on cast bases and some conveyor legs. The standard fit is two swivel and two rigid casters so the loaded unit tracks straight, with brakes recommended wherever the trolley or bench must hold position on any slope.

Sumatic produces its own forks, bearings and wheels, which keeps a medium duty programme to one specification and one supplier across every size in this line. Finishes cover zinc, nickel and black epoxy, and OEM customers can add branding, laser marking and per-asset packaging.

Send the loaded weight, floor and mounting detail through the RFQ form and we will return a recommended set with load tables and pricing. Standard-size quotations are typically issued the same day.