Simplicity® Plain Linear Bearings, Sleeve Bushings, Pillow Blocks & Flange Mounts
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Extended Plain Linear Bearing with a 16mm compensated ID consisting of a round flanged aluminum housing (end mount) with a self-lubricating FrelonGold® lining for maintenance-free linear, rotational or oscillating motion in harsh conditions like extreme heat, dirt, and vibration. Extended aluminum housing with a self-lubricating FrelonGOLD® liner Round Flanged End ..
$80.17
Double plain linear bearing, square-end-flange w/ a 20mm precision ID. This closed-shell bearing features an extended aluminum housing and a Simplicity® self-lubricating FrelonGOLD® liner bonded directly to the bore for oil-free, maintenance-free linear motion, with rotational or oscillating shaft motion possible in harsh environments such as extreme temperatures, dirt, contamination,..
$94.59
Double plain linear bearing, square-end-flange w/ a 12mm precision ID. This closed-shell bearing features an extended aluminum housing and a Simplicity® self-lubricating FrelonGOLD® liner bonded directly to the bore for oil-free, maintenance-free linear motion, with rotational or oscillating shaft motion possible in harsh environments such as extreme temperatures, dirt, contamination,..
$68.70
Double Plain Linear Bearing of 16mm JIS Metric ID with a round flange (end-mounted) and a precision running clearance of 0.0005" per side. The self-lubricating bearing liner is FrelonGOLD®. The bearing enables linear or rotational movement. Double sized with a round flange end-mounted JIS Metric Series (Inch and ISO Metric..
$78.21
Double Plain Linear Bearing of 35mm JIS Metric ID with an end-mounted square flange and a compensated running clearance of 0.0015" per side. The self-lubricating bearing liner is FrelonGOLD®. The bearing enables linear or rotational movement. JIS Metric Series (Inch and ISO Metric variants available) Compensated ID running clearance (0.0015"..
$237.75
Double Plain Linear Bearing of 1/2" ID placed inside an aluminum housing with a square flanged end and a bearing inside with a compensated running clearance of 0.0015" per side. The self-lubricating bearing liner is FrelonGOLD® which enables linear or rotational movement. Compensated ID running clearance (0.0015" per side) Double..
$149.68
Double die set plain linear bearing, steel shelled, with a 2″ ID (inner diameter) and a precision running clearance of 0.0005″ per side. Features a center round flange and self-lubricating FrelonGOLD® liner as standard, which provides optimal performance in extreme conditions such as dirt, heat and vibration. This large sized..
$524.37
Extended size plain linear bearing inside a square flanged housing with a 1" inner diameter and a compensated running clearance of 0.0015" per side. The self-lubricating bearing liner is FrelonGOLD®. The bearing enables linear or rotational movement. Double sized bearing inside a housing with a square flanged end Compensated ID..
$241.36
Extended Plain Linear Bearing with a 3/4" ID in a square flanged aluminum housing (end mount). The ID has a precision running clearance and features a unique self-lubricating FrelonGold® lining for maintenance-free linear, rotational or oscillating motion in harsh conditions like extreme heat, dirt, and vibration. Extended Size Housing With..
$176.77
Double die set plain linear bearing, steel shelled, with a 1.25″ ID (inner diameter) and a precision running clearance of 0.0005″ per side. Features a round flange and self-lubricating FrelonGOLD® liner as standard, which provides optimal performance in extreme conditions such as dirt, heat and vibration. This large steel shelled..
$261.51
Double die set plain linear bearing with a 1″ ID (inner diameter) and a precision running clearance of 0.0005″ per side in 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. An..
$218.35
Double plain linear bearing, 20mm ID, square center flange, precision running clearance. This Simplicity® bearing uses a self-lubricating FrelonGOLD® liner bonded directly to the bore of a sturdy aluminum body, without a separate bearing insert. The result is maintenance-free, oil-free sliding performance in extreme conditions such as heat, dirt, and..
$102.02
JIS Double Plain Linear Bearing, 30mm ID, round center flange, compensated running clearance. This Simplicity® bearing has a self-lubricating FrelonGOLD® liner bonded directly to the bore of a sturdy anodized aluminum body, with no separate insert, for maintenance-free, oil-free sliding in harsh environments such as extreme heat, dirt, welding splatter,..
$178.99
JIS Double Plain Linear Bearing, 25mm ID, square center flange, precision running clearance. This Simplicity® bearing has a self-lubricating FrelonGOLD® liner bonded directly to the bore of a sturdy anodized aluminum body, with no separate insert, for maintenance-free, oil-free sliding in harsh environments such as extreme heat, dirt, welding splatter,..
$124.03
JIS Double Plain Linear Bearing, 10mm ID, square center flange, precision running clearance. This Simplicity® bearing has a self-lubricating FrelonGOLD® liner bonded directly to the bore of a sturdy anodized aluminum body, with no separate insert, for maintenance-free, oil-free sliding in harsh environments such as extreme heat, dirt, welding splatter,..
$70.19
Twin plain linear bearing pillow block, open, with a 2" compensated ID. This self-aligning, mountable aluminum alloy pillow block bearing uses a twin open-shelled design for added bearing surface and shaft support. The inserted open-shell Simplicity® plain bearing can tilt slightly within the housing to compensate for up to 1/2°..
$566.53
Twin plain linear bearing pillow block, open, with a 1.5" precision ID. This self-aligning, mountable aluminum alloy pillow block bearing uses a twin open-shelled design for added bearing surface and shaft support. The inserted open-shell Simplicity® plain bearing can tilt slightly within the housing to compensate for up to 1/2°..
$393.03
Twin plain linear bearing pillow block, open, with a 1.5" compensated ID. This self-aligning, mountable aluminum alloy pillow block bearing uses a twin open-shelled design for added bearing surface and shaft support. The inserted open-shell Simplicity® plain bearing can tilt slightly within the housing to compensate for up to 1/2°..
$393.03
Twin plain linear bearing pillow block, open, with a 3/4" compensated ID. This self-aligning, mountable aluminum alloy pillow block bearing uses a twin-length open design for added bearing surface and shaft support. The inserted open-shell Simplicity® plain bearing can tilt slightly within the housing to compensate for up to 1/2°..
$157.22
Twin plain linear bearing pillow block, closed-shell, 2" precision ID, with an aluminum-alloy mounting block and pre-drilled mounting holes. The inserted Simplicity® plain bearing features an anodized aluminum shell and a bonded, self-lubricating FrelonGOLD® bore liner for maintenance-free linear motion on round shafts in harsh environments such as extreme temperatures,..
$492.14
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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