TK12 Self Aligning Ball Bushings 12mm Linear Motion 42mm od this is a popular size

this is a popular size that could be used in many application that uses 21/32" inch

Bearing No: HC214

the 6004ZZENR outer diameter is 42mm

Stainless Steel Deep groove ball bearings single row Radial Bearing 8 mm ID x 16 mm OD x 6 mm Wide

TK12 Self Aligning Ball Bushings 12mm Linear Motion 42mm od this is a popular sizeTK12: TopBall High Load Standard Linear Systems Self Aligning Ball Bushing TK12 12 Bore High Load Standard type TopBall metric type linear motion ball bushings bearing inner diameter(bore) is 12 mm dimensions with built in seals. the Topball slide bush is a high performance bushing with three times the load capacity capable of providing up to 27 times normal travel life of a conventional slide bushing high accuracy grade linear bushings series mainly