Linear Bearings
Bearings housed in carriages and tables can ride on round shafts or square profile rails. Here’s a look at the advantages of each when an application demands guided linear motion.”
Engineers faced with a linear-motion application often turn to pre-engineered linear bearings and guides. But linear guides come in two basic shapes – round and square – and designers often struggle with which type to use. Square or profile rails once cost significantly more than round because the former need extensive grinding that is inherent to the design. But recent manufacturing advances and economies of scale let square rails now compete with round in a broad range of applications.
The criteria for choosing one over the other are no different than choosing any other machine component: define system objectives, then consider factors such as load capacity, stiffness, accuracy, smoothness, size, and overall costs. The best place to start is to look at the fundamental qualities of each type of guide.

- AST LBE 40 UU AJ linear bearings
- Open
- 29536

- AST LBE 8 AJ linear bearings
- AST
- LBE 8 AJ

- AST LBE 40 AJ linear bearings
- 4012802334685
- 0.3 mm

- INA KTSOS25-PP-AS linear bearings
- 64 mm
- Separable Outer Ring

- INA KH40-PP linear bearings
- Dry 1.65, Periodic L
- Dry -40 to +392

- Samick CLB14UU linear bearings
- 3.1493 in
- Max 250°

- Samick CLB20 linear bearings
- Uncoated
- Chrome Steel

- Samick LMEKP20 linear bearings
- Carbon Steel
- Left Hand

- 16 mm x 26 mm x 24,9 mm Samick LME16UUOP linear bearings
- 0.010 in
- Labyrinth

- 25 mm x 40 mm x 44,1 mm Samick LME25UU linear bearings
- 0.8750 in
- Steel

- 12 mm x 22 mm x 22,9 mm Samick LME12OP linear bearings
- Left Hand
- Male Threaded

- 10 mm x 19 mm x 22 mm Samick LM10UUAJ linear bearings
- Heavy Duty
- Powder Coat