Simplicity® Plain Linear Bearings, Sleeve Bushings, Pillow Blocks & Flange Mounts
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Open plain linear bearing with a 1.5" precision ID, which has a 0.0005" per side running clearance. Encased in an anodized aluminum shell and lined with self-lubricating FrelonGOLD®, this bearing ensures maintenance-free performance in harsh conditions, including extreme temperatures, dirt, and vibration. Inch Series - Open anodized aluminum shell Precision..
$93.14
Plain linear bearing, self-aligning, closed, with a 1.25" precision ID that provides a 0.0005" running clearance per side on matching round shafts. Encased in a crowned-OD cylindrical anodized aluminum shell that realigns when there is a slight misalignment between parallel shafts, this bearing features a bonded Simplicity® self-lubricating FrelonGOLD® bore..
$71.81
Plain linear bearing, self-aligning, closed, with a 3/8" precision ID that provides a 0.0005" running clearance per side on matching round shafts. Encased in a crowned-OD cylindrical anodized aluminum shell, this bearing can pivot slightly within its housing to accommodate angular misalignment between parallel shafts. It features a bonded Simplicity®..
$19.50
Closed self-lubricating plain linear bearing with a 20mm JIS Metric ID and a compensated running clearance of 0.0015" per side. It features a self-lubricating FrelonGOLD® liner for excellent wear resistance, vibration dampening, and reduced friction in harsh and/or high temperature conditions. The green anodized aluminum shell with a straight outer..
$21.00
Crowned, closed, self-aligning plain linear bearing with an 8mm JIS Metric inner diameter and a precision running clearance of 0.0005" per side. Made with a self-lubricating FrelonGOLD® liner, it offers excellent wear resistance and vibration dampening, ensuring smooth operation without extra lubrication. The anodized aluminum shell is both lightweight and..
$20.94
FAG-interchange plain linear bearing, closed, with an 8mm precision ID (inner diameter) that provides a 0.0005" running clearance per side on matching round shafts. This compact thin-wall bearing, sized to FAG interchange dimensions, is encased in an anodized aluminum outer shell and features a bonded Simplicity® self-lubricating FrelonGOLD® bore liner..
$14.38
Square Linear Shaft of 1.5" diameter and a length of 36", made of 304 stainless steel, known for high corrosion resistance. Buffed and polished to provide an excellent running surface for self-lubricating Frelon®J lined square bearing plugs and pads. Part Number PST24-036-000 Bearing Type Stainless Steel Square Shafting Diameter 1.5"..
$191.69
Square Linear Shaft of 1" diameter and a length of 36", made of 304 stainless steel, known for high corrosion resistance. Buffed and polished to provide an excellent running surface for self-lubricating Frelon®J lined square bearing plugs and pads. Part Number PST16-036-000 Bearing Type Stainless Steel Square Shafting Diameter 1"..
$102.74
Round flanged plain linear bearing with a 25mm ID, a precision round shaft running clearance, and a standard-size aluminum housing featuring a self-lubricating Simplicity® FrelonGOLD® liner bonded directly to the bore of the housing. Unlike recirculating ball bearings, the FrelonGOLD® sliding surface has no rolling elements to jam, seize, or..
$68.35
Square flanged plain linear bearing with a 40mm ID, a compensated running clearance, and a standard-size aluminum housing featuring a self-lubricating Simplicity® FrelonGOLD® liner bonded directly to the bore of the housing. The square flange allows secure mounting to a machine frame or plate, while the bore lining supports maintenance-free..
$179.58
Square flanged plain linear bearing with an 8mm ID, a precision running clearance, and a standard-size aluminum housing featuring a self-lubricating Simplicity® FrelonGOLD® liner bonded directly to the bore of the housing. Unlike recirculating ball bearings, the sliding surface has no rolling elements to jam, seize, or contaminate, making it..
$36.43
Square Flanged Plain Linear Bearing with a 1" compensated ID, designed to slide smoothly on both steel and ceramic-coated aluminum shafts. It features a self-lubricating FrelonGOLD® bearing liner that performs reliably with vibration damping in harsh conditions, enabling long-term, maintenance-free operation. Compensated running clearance on the inner diameter 0.0015” per..
$110.74
Die set plain linear bearing, steel shelled, with a 2″ inner diameter, a precision running clearance of 0.0005″ per side and a closed, standard-width design. Features a round flange and self-lubricating FrelonGOLD® liner as standard, which provides optimal performance in extreme conditions such as dirt, heat and vibration. Typical applications..
$290.20
Linear Sleeve Bearing with an 8mm ID, a 12mm OD and an 8mm length, unflanged with a closed aluminum alloy shell. This maintenance-free Simplicity® plain bushing is designed for both linear and rotational movement. The self-lubricating FrelonGold® bearing liner guarantees performance in extreme environments, including heat, dirt, and oscillation, eliminating..
$11.39
Simplicity® Plain Linear Sleeve Bearing with a 3/8" inner diameter and 3/4" length, and a round flanged end mount. This closed plain bushing is designed for both linear and rotational movement. The self-lubricating, maintenance-free bearing liner is FrelonGold®, ensuring durable performance in hot or dirty environments without catastrophic failure. Temperature..
$19.36
Linear Sleeve Bearing with a 1.75" inner diameter, 3" length and closed aluminum alloy shell. This maintenance-free Simplicity® plain bushing is designed for both linear and rotational movement. The self-lubricating FrelonGold® bearing liner guarantees performance in extreme environments, including heat, dirt, and oscillation, eliminating the risk of catastrophic failure. Temperature..
$77.14
Simplicity® Plain Linear Sleeve Bearing with a 3/8" inner diameter and a length of 1/2" with a round flanged end mount. This closed plain bushing is designed for both linear and rotational movement. The self-lubricating, maintenance-free bearing liner is FrelonGold® by default, ensuring long-lasting performance in extremely hot and/or dirty..
$19.23
Linear Sleeve Bearing with a 5/8" inner diameter, 1" length and closed aluminum alloy shell. This maintenance-free Simplicity® plain bushing is designed for both linear and rotational movement. The self-lubricating FrelonGold® bearing liner guarantees performance in extreme environments, including heat, dirt, and oscillation, eliminating the risk of catastrophic failure. Temperature..
$17.41
Linear Sleeve Bearing with a 2" inner diameter, 3" length and closed aluminum alloy shell. This maintenance-free Simplicity® plain bushing is designed for both linear and rotational movement. The self-lubricating FrelonGold® bearing liner guarantees performance in extreme environments, including heat, dirt, and oscillation, eliminating the risk of catastrophic failure. Temperature..
$90.85
Flanged Plain Linear Sleeve Bearing with a 3/16" inner diameter and a length of 1/2" with a round flange end mount. This closed plain bushing is designed for both linear and rotational movement. The self-lubricating, maintenance-free bearing liner is FrelonGold® by default, ensuring performance in hot and/or dirty environments without..
$13.92
Plain linear bearings are precision-bored linear motion components that use sliding elements along the bore’s inner diameter, such as a bonded self-lubricating liner or low-cost injection-molded polymer liner, to produce low-friction straight-line motion along a round or square shaft. Open-shelled versions provide a cutout to clear the way for rail supported shafts or profiled rails. Unlike rolling element ball bearings, plain linear bearings eliminate balls that can jam, seize, contaminate, brinell (dent), or fail in harsh environments. Simplicity® plain linear bearings feature a premium bonded, self-lubricating FrelonGOLD® PTFE-based liner that minimizes friction and wear, eliminates the need for external lubrication, and delivers long-lasting maintenance-free performance in conditions involving extreme heat, dirt, welding splatter, particulates, debris, vibration, shock, washdown, and caustic exposure. Configurations include standard, twin-size, self-aligning, die set, flanged, pillow block bearings and sleeve bearings (bushings). Off-the-shelf style choices include round or square shaft bearings, straight or crowned anodized aluminum shells, open or closed shell designs, standard or double-size housings, and straight or flanged sleeve options. Optional Frelon®J liners provide resistance to corrosive chemicals, and Frelon®W liners support FDA-compliant applications. All variants are available with precision or compensated running clearances and can support linear, rotary, or oscillating motion. ID sizes are offered in Inch, ISO Metric, and JIS Metric standards. The 2:1 binding rule applies to plain bearing systems as the farther a load sticks out from the shaft or rail, the farther apart the bearings or carriages need to be to prevent binding.
- Sizing Options: Inch, metric, and JIS sizes available
- Available in open, closed and thin-wall styles
- ID Sizes: Available from 3/16” to 4” Inch Series, 5mm to 80mm Metric Series
- Shaft Lengths: Up to 12 feet
- Shell Material: Standard is aluminum; stainless steel shells are available
- Maximum Speed: Up to 8 m/s (315 in/s)
- Temperature Rating: -400°F to +400°F or -240°C to 204°C
- Maximum Horizontal Static Load: 2,165 to 100,500 lb (982 to 45,586 kg)
- Seal Options: Nitrile rubber, urethane, and viton seals available from ½” ID and up or 20mm and up
- Mounting Options: O-ring and retaining ring grooves for multiple mounting options
- External Lubrication: Optional feature for added lubrication
- Vibration Damping: Ensures smooth and quiet operation
View the Plain Linear Bearing Product Features page
Frequently Asked Questions
What are flanged plain bearings used for?
Flanged plain bearings are used to simplify mounting and axial positioning in linear motion systems, providing a built-in flange that helps secure the bearing within a housing or plate.
What is a pillow block plain bearing?
A pillow block plain bearing is a mounted assembly that houses a plain bearing in a rigid block, making installation easier while providing alignment support and load distribution.
What are twin or double-size plain bearings?
Twin or double-size plain bearings feature extended length or dual-bearing surfaces to increase load capacity, improve stability, and reduce deflection in demanding applications.
What are die set plain bearings used for?
Die set plain bearings are designed for use in stamping and tooling applications, providing precise linear guidance and durability under high loads and repetitive motion.
What are thin-wall plain bearings?
Thin-wall plain bearings are designed for space-constrained applications, offering a reduced outer diameter while maintaining low friction and reliable linear motion performance.
What is a sleeve bushing in linear motion applications?
A sleeve bushing is a cylindrical plain bearing that provides smooth, low-friction motion along a shaft, commonly used where compact size and simple installation are required.
What are the benefits of self-lubricating liners in plain bearings?
Self-lubricating liners eliminate the need for external lubrication, reduce maintenance, minimize friction and wear, and perform reliably in dirty, dry, or high-temperature environments.
When should mounted plain bearings be used instead of standalone bearings?
Mounted plain bearings, such as pillow blocks or flanged units, should be used when easier installation, improved alignment, and additional structural support are required.
What materials are used in plain bearing liners?
Plain bearing liners are typically made from PTFE-based materials that provide low friction, wear resistance, and consistent performance across a wide range of temperatures and conditions.
Can plain bearings operate without lubrication?
Yes, plain bearings with self-lubricating liners are designed to operate without external lubrication, making them ideal for applications where maintenance access is limited or contamination is a concern.
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