Double linear ball bearing, closed, with a 50mm ID (inner diameter). Featuring a heat-treated alloy steel shell for durability, a resin retainer polymer cage for reduced noise and a low coefficient of friction for speed. Handles cantilevered loads better than plain bearings, overcoming the 2:1 binding ratio limitation of plain..
$236.45
Twin linear ball bearing with JIS 40mm ID, square flanged center-mount housing, heat-treated alloy steel shell, quiet resin retainer polymer cage, and double seals included as standard. Built to Japanese Industrial Standards, the recirculating ball design provides low-friction, high-speed linear motion and can outperform plain bearings in cantilevered applications where..
$155.02
Twin linear ball bearing with JIS 40mm ID, square flanged end-mount housing, heat-treated alloy steel shell, quiet resin retainer polymer cage, and double seals included as standard. Built to Japanese Industrial Standards, the recirculating ball design provides low-friction, high-speed linear motion and can outperform plain bearings in cantilevered applications where..
$117.10
Linear ball bearing, round end flange, double sized, 40mm ID JIS metric, equipped with a long heat-treated alloy steel shell for durability, higher load capacity, and standard double seals for added protection. The double-sized design is equivalent to two standard linear ball bearings mounted back to back, while the round..
$118.18
Double-sized round-flanged end-mount linear ball bearing, 40mm ISO metric ID with a long heat-treated alloy steel shell for higher load and moment capacity. Equivalent to two standard-sized bearings mounted back to back, the round end flange allows flexible rotational positioning during installation and avoids corner interference in tight spaces. Recirculating..
$147.98
Double linear ball bearing, closed, with a 1.5" inner diameter (ID). The twin-size format equals two standard linear ball bearings mounted back-to-back for added stability. Its ball bearing design provides a low coefficient of friction and offers an advantage in cantilevered applications where plain bearings may be limited by the..
$136.58
Linear ball bearing with a JIS 40mm ID, square flanged end-mount standard sized housing, heat-treated alloy steel shell, quiet resin retainer polymer cage, and double seals included as standard. Built to Japanese Industrial Standards, the recirculating ball design provides low-friction, high-speed linear motion and can outperform plain bearings in cantilevered..
$90.47
Round Flanged Linear Ball Bearing with a 40mm ID JIS Metric and standard width, featuring an end-mounted flange, a heat-treated alloy steel shell for durability and double seals for enhanced protection. Boasts a low coefficient of friction for speed and a resin retainer polymer cage for reduced noise. Excels in..
$90.21
Linear ball bearing, double-sized and closed, with a 40mm ID JIS Metric, featuring a double wide heat-treated alloy steel shell for greater durability and higher load capacity under cantilevered conditions. Double seals add protection, a low coefficient of friction enables higher speeds, and a resin retainer polymer cage reduces noise...
$136.42
Square-flanged linear ball bearing, 40mm ID ISO metric, standard-sized, end mount, with a closed heat-treated alloy steel shell for durability on end-supported shafts. The square flange provides secure four-bolt mounting, while recirculating hardened steel balls and a low coefficient of friction support smooth, high-speed travel. A resin retainer polymer cage..
$90.60
Double linear ball bearing, closed, with a 40mm ID (inner diameter). Featuring a heat-treated alloy steel shell for durability, a resin retainer polymer cage for reduced noise and a low coefficient of friction for speed. Handles cantilevered loads better than plain bearings, overcoming the 2:1 binding ratio limitation of plain..
$136.94
Adjustable linear ball bearing, closed, with a 2" inner diameter (ID). The adjustable split shell design lets users fine-tune fit and running clearance for smooth, accurate linear motion with a low coefficient of friction. Its ball bearing design offers an advantage in cantilevered applications where plain bearings may be limited..
$274.62
Adjustable linear ball bearing with a 50mm ID JIS Metric, featuring a flexible slit along the side that provides adaptability for imperfect or worn shafts. A standard-sized heat-treated alloy steel shell enhances durability and load capacity, especially in cantilevered applications. Double seals add protection, a low coefficient of friction enables higher..
$125.80
Linear ball bearing, closed shell, with a 50mm ID JIS Metric, featuring a standard-sized heat-treated alloy steel shell that enhances durability and load capacity. Recommended over plain bearings in cantilevered applications as the 2:1 binding rule does not apply. Double seals add protection, a low coefficient of friction enables higher..
$102.93
Adjustable Linear Ball Bearing with a 50mm ISO Metric ID (inner diameter). This adjustable round shaft bushing would be used when working with an old shaft or an old machine, or any other environment where parts are not perfectly made. Temperature Range: -4/+176°F (-20/+80°C) Variant ID Sizes: Available from 1/4"..
$125.22
Closed Linear Ball Bearing with a 50mm ISO Metric ID (inner diameter). This closed round shaft bushing is a popular choice for cantilevered applications in relatively clean environments with minimal debris. ISO Metric Series - Closed shell for end-supported shaftsHandles cantilevered loads better than plain bearings Temperature Range: -4/+176°F (-20/+80°C)..
$104.70
Linear ball bearing, open shelled, with a 2" inner diameter (ID). The open design allows use with supported shafting while the ball bearing design provides smooth, accurate linear motion with a low coefficient of friction. It offers an advantage in cantilevered applications where plain bearings may be limited by the..
$151.15
Twin linear ball bearing with JIS 30mm ID, square flanged center-mount housing, heat-treated alloy steel shell, quiet resin retainer polymer cage, and double seals included as standard. Built to Japanese Industrial Standards, the recirculating ball design provides low-friction, high-speed linear motion and can outperform plain bearings in cantilevered applications where..
$79.90
Twin linear ball bearing with JIS 30mm ID, square flanged end-mount housing, heat-treated alloy steel shell, quiet resin retainer polymer cage, and double seals included as standard. Built to Japanese Industrial Standards, the recirculating ball design provides low-friction, high-speed linear motion and can outperform plain bearings in cantilevered applications where..
$67.48
Double-sized square-flanged linear ball bearing, 30mm ID, center mount, with a long heat-treated alloy steel shell for higher load and moment capacity. The center flange provides balanced four-bolt mounting and improved resistance to moment loading, while the double-size design is equivalent to two standard bearings mounted back to back. Recirculating..
$156.87
Linear ball bearings are rolling-element linear bearings that use recirculating hardened steel balls instead of sliding elements to provide low-friction, straight-line motion along round shafts with only one degree of freedom. They are better suited than plain linear bearings for higher speeds, longer strokes, and overhanging cantilevered loads due to their lower coefficient of friction and because plain bearings may bind under the 2:1 rule, requiring plain bearing spacing to be at least twice the load overhang, a rule rolling-element bearings are not subject to.
PBC Linear linear ball bearings feature heat-treated alloy steel shells for durability, precision steel balls for smooth travel, molded polymer resin retainers for reduced noise, and standard double seals to help keep contaminants out. However, linear ball bearings typically require more maintenance than plain bearings, including periodic lubrication and greater care to keep debris, contamination, shock, and vibration away from the rolling elements.
Available in closed, open, adjustable, self-aligning, flanged, pillow block, and double-wide configurations, PBC Linear ball bearings are dimensionally interchangeable with industry standards and cover inch sizes from 1/4 in. to 2 in. ID and metric sizes from 8 mm to 50 mm ID. Static load capacities reach up to 3,500 lb. (15,900 N) and dynamic load capacities up to 1,300 lb. (6,000 N), with operating 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?
Use linear ball bearings when you need smooth, high-speed linear motion with minimal friction and good performance under overhung or cantilevered loads.
What are the main practical use differences between plain linear bearings and linear ball bearings?
Linear ball bearings differ from plain linear bearings in three key ways: (1) they resist rotation and provide more controlled, single-axis motion; (2) they handle cantilevered loads better, avoiding the ~2:1 binding limitation common in plain bearings; and (3) they support higher speeds due to rolling contact instead of sliding friction.
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