Self-Aligning Linear Ball Bearings | Precision Plus®
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Closed linear ball bearing with a 3/8" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants available in sizes from 1/4"..
$23.09
Closed linear ball bearing with a 1/2" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants available in sizes from 1/4"..
$24.80
Self-aligning closed linear ball bearing 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..
$169.65
Closed linear ball bearing with a 5/8" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants available in sizes from 1/4"..
$27.48
Closed linear ball bearing with a 1/4" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants available in sizes from 1/4"..
$22.57
Open Linear Ball Bearing, self-aligning, with a 2" ID and a low coefficient of friction. Constructed with a heat-treated alloy steel shell, the resin retainer effectively reduces noise during operation, while double seals are included as standard at no additional cost. Open shell for use with rail supported round linear..
$221.63
Self-aligning open linear ball bearing with a 25mm inner diameter. Featuring a heat-treated alloy steel shell for durability and 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..
$51.04
Closed linear ball bearing with a 1" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants available in sizes from 1/4"..
$52.52
Closed linear ball bearing with a 3/4" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants available in sizes from 1/4"..
$32.68
Self-aligning closed linear ball bearing 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..
$100.02
Self-aligning closed linear ball bearing with a 30mm 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..
$73.41
Self-aligning closed linear ball bearing with a 25mm 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..
$50.16
Self-aligning closed linear ball bearing with a 20mm 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..
$31.45
Self-aligning closed linear ball bearing with a 16mm 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..
$27.40
Closed linear ball bearing with a 2" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer polymer cage for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants in sizes from..
$172.18
Closed linear ball bearing with a 1.5" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer polymer cage for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants in sizes from..
$103.81
Closed linear ball bearing with a 1.25" ID, self-aligning, featuring a heat-treated alloy steel shell and resin retainer polymer cage for reduced noise. It offers a low coefficient of friction, includes double seals at no extra cost, and operates from -4°F to 176°F (-20°C to 80°C). Variants in sizes from..
$74.02
Open Linear Ball Bearing, Self-Aligning, with a 1.5" ID and a low coefficient of friction. Constructed with a heat-treated alloy steel shell, the resin retainer effectively reduces noise during operation, while double seals are included as standard at no additional cost. Temperature Range: -4/+176°F (-20/+80°C) Variant ID Sizes: from 1/4"..
$127.45
Open Linear Ball Bearing, Self-Aligning, with a 1.25" ID and a low coefficient of friction. Constructed with a heat-treated alloy steel shell, the resin retainer effectively reduces noise during operation, while double seals are included as standard at no additional cost. Temperature Range: -4/+176°F (-20/+80°C) Variant ID Sizes: from 1/4"..
$92.31
Open Linear Ball Bearing, Self-Aligning, with a 1" ID and a low coefficient of friction. Constructed with a heat-treated alloy steel shell, the resin retainer effectively reduces noise during operation, while double seals are included as standard at no additional cost. Temperature Range: -4/+176°F (-20/+80°C) Variant ID Sizes: from 1/4"..
$65.46
Precision Plus® self-aligning linear ball bearings use recirculating ball bearings to provide smooth, low-friction travel on round linear shafts while compensating for shaft or housing misalignment. Their self-aligning capability comes from floating hardened steel raceway inserts inside the high-strength polymer shell, allowing the bearing’s rolling contact surfaces to shift slightly and align with the shaft under load. This helps reduce binding, edge loading, and uneven ball contact when mounting surfaces or shafting are not perfectly aligned. This category includes both closed and open self-aligning variants. Closed bearings fully surround the shaft and are designed for end-supported shafting, while open bearings include a clearance opening for use with continuously supported shafts. Both styles provide up to 1/2° of self-alignment in all directions, use hardened steel ball raceway inserts for reliable rolling contact, and remain lightweight and durable thanks to the polymer outer shell. The bearings are size-interchangeable with industry-standard super-type ball bearings and are designed for applications requiring smooth motion, low friction, and improved tolerance for alignment error. They support static load capacities up to 2,500 lb (11,000 N) and dynamic load capacities up to 2,200 lb (9,700 N), making them a strong choice for demanding linear motion systems where shaft alignment, load support, and consistent travel are critical.
- Inserts provide 1/2° self-alignment in all directions
- Size interchangeable with industry standard super-type ball bearings
- Static Load Capacities up to 2,500 lb (11,000 N)
- Dynamic Load Capacities up to 2,200 lb (9,700 N)
- Low coefficient of friction
- Outer shell is of high strength polymer
- Ball bearing raceway inserts are hardened steel
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