Linear ball bearings are rolling-element linear bearings that use recirculating steel balls instead of sliding elements for low-friction motion along a straight-line axis with one degree of freedom. They are better suited than plain bearings for higher speeds, longer strokes, and overhanging cantilevered loads where the 2:1 binding rule can be a concern. PBC Linear linear ball bearings feature heat-treated alloy steel shells for durability, precision steel balls for smooth travel, polymer resin retainers for reduced noise, and standard double seals to help keep contaminants out. Available in closed, open, and adjustable configurations, they cover inch sizes from 1/4" to 2" ID and metric sizes from 8mm to 50mm ID. These bearings are dimensionally interchangeable with industry standards and are available as standalone cylindrical bearings, pillow blocks, flanged units, and double-sized (twin) versions for added load support. Typical load ratings reach up to 1700 lb. (7900 N) static and 850 lb. (3800 N) dynamic, with reliable operation across temperatures from -4°F to 176°F (-20°C to 80°C).
Standard Linear Ball Bearings
Linear Ball Bearings from PBC Linear provide unmatched performance in linear motion with compatibility for industry standards. These bearings feature durable, heat-treated alloy steel shells and resin retainers for quieter operation and reduced friction.
| Feature | Specification |
|---|---|
| Temperature Range | -4°F to +176°F (-20°C to +80°C) |
| Material | Heat-treated alloy steel shells |
| Designs | Wide range including double wide and thin wall |
| Styles | Closed | Open | Double Wide | Thin Wall |
|---|
Linear Ball Bearing Flange Mounts
Designed for compact and efficient installation, Linear Ball Bearing Flange Mounts excel in high-speed applications. These mounts offer outstanding load capacities and low friction for enhanced performance.
| Feature | Specification |
|---|---|
| Inner Diameter Range | 8 mm to 50 mm |
| Static Load Capacity | Up to 15,900 N |
| Dynamic Load Capacity | Up to 6,080 N |
| Designs | Double wide options available |
| Styles | Round | Square | Round Center Mount | Square Center Mount | Double Wide |
|---|
Linear Ball Bearing Pillow Blocks
Linear Ball Bearing Pillow Blocks are designed for versatile mechanical applications, featuring aluminum alloy housings and ball bearing inserts for stability and efficiency. These blocks accommodate high loads while minimizing friction.
| Feature | Specification |
|---|---|
| Static Load Capacity | Up to 7,900 N (1,700 lb) |
| Dynamic Load Capacity | Up to 3,800 N (850 lb) |
| Designs | Open and closed configurations |
| Styles | Closed Single | Closed Twin | Open Single | Open Twin |
|---|
Frequently Asked Questions
When should I use linear ball bearings?
What are the main practical use differences between plain linear bearings and linear ball bearings?
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