Originally posted by csa Yes it does say that. From the exploded view the bearings do not support the arm weight.
That type of bearing will work on the central pivot but will probably still not give smooth motion on the swing.
For the swing you need to have bearings of the type found in roller blades.
The critical review here 'bears' this out.
Amazon.com: Customer Reviews: Opteka GH1 Pro Heavy Duty Metal Gimbal Head (Supports up to 30lbs)
Anyway the Bigma does not weigh too much and so the gimbal will probably work fine. it does look bettter than the eBay ones that I disassembled and found no bearings at all, just some nylon washers inside.