Deep groove ball bearing 6244-M carries radial loads through a single row of balls guided by a solid brass cage (M), running with bore diameter 220.0 mm, outside diameter 400.0 mm and width 65.0 mm. Net mass is 37.9 kg. Limiting speed is rated at 2850.0 1/min, with a reference speed of 2200.0 1/min, giving a solid basis for speed selection at this size. Radial internal clearance falls in the CN (Group N) range. The solid brass cage keeps ball spacing stable at the higher end of the permissible speed range and under momentary load peaks, which suits continuous rotation at the stated speed values. CN clearance corresponds to normal running conditions without additional preload, so mounting fits and operating temperature should be selected to keep this clearance within its intended range. The bearing is supplied open (bore type Z designation as listed), meaning lubrication and sealing arrangements must be provided externally by the surrounding housing design.