Plain Linear Bearing Pillow Blocks
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Plain linear bearing pillow block, open, with a 1/2" compensated ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$63.28
Plain linear bearing pillow block, open, with a 3/4" compensated ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$78.52
Plain linear bearing pillow block, closed, with a 1" compensated ID. This self-aligning, mountable, standard-sized pillow block features an inserted closed-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$91.53
Plain linear bearing pillow block, open, with a 1" compensated ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$110.92
Twin plain linear bearing pillow block, closed, with a 1" compensated ID. This self-aligning mountable aluminum alloy pillow block bearing features an inserted Simplicity® plain bearing with a bonded, self-lubricating FrelonGOLD® liner for oil-free, maintenance-free motion through high temperatures, dirt, contamination, vibration, and shock loads. The twin body adds bearing..
$183.36
Twin plain linear bearing pillow block, closed, with a 1" precision ID. This self-aligning mountable aluminum alloy pillow block bearing features an inserted Simplicity® plain bearing with a bonded, self-lubricating FrelonGOLD® liner for oil-free, maintenance-free motion through high temperatures, dirt, contamination, vibration, and shock loads. The twin body adds bearing..
$183.36
Plain linear bearing pillow block, closed, with a 3/4" precision ID. This self-aligning, mountable, standard-sized pillow block features an inserted closed-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$63.71
Plain linear bearing pillow block, open, with a 1" precision ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$110.92
Plain linear bearing pillow block, open, with a 3/4" precision ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$78.52
Plain linear bearing pillow block, open, with a 1.5" compensated ID. This self-aligning, mountable, standard-sized pillow block features an inserted open-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$173.51
Plain linear bearing pillow block, closed, with a 1" precision ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and..
$91.53
Twin plain linear bearing pillow block, open, with a 1" 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..
$212.44
Plain linear bearing pillow block, open, with a 1.25" precision ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$166.22
Plain linear bearing pillow block, open, with a 1/2" precision ID. This self-aligning, mountable, standard-sized pillow block features an inserted open-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$63.28
Plain linear bearing pillow block, closed, with a 2" compensated ID. This self-aligning, mountable, standard-sized pillow block features an inserted closed-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$263.51
Plain linear bearing pillow block, closed, with a 1/2" precision ID. This self-aligning, mountable, standard-sized pillow block features an inserted closed-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$54.09
Twin plain linear bearing pillow block, closed, with a 2" compensated ID. This self-aligning mountable aluminum alloy pillow block bearing features an inserted Simplicity® plain bearing with a bonded, self-lubricating FrelonGOLD® liner for oil-free, maintenance-free motion through high temperatures, dirt, contamination, vibration, and shock loads. The twin body adds bearing..
$492.14
Plain linear bearing pillow block, open, with a 5/8" compensated ID for round shafts. This self-aligning, mountable, standard-sized pillow block features an inserted Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® bore liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration,..
$73.20
Plain linear bearing pillow block, open, with a 40mm compensated ID. This self-aligning, mountable, standard-sized pillow block features an inserted open-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$268.24
Plain linear bearing pillow block, closed, with a 1.25" compensated ID. This self-aligning, mountable, standard-sized pillow block features an inserted closed-shelled Simplicity® plain bearing within an aluminum alloy housing. The self-lubricating FrelonGOLD® liner provides oil-free, maintenance-free motion in harsh conditions such as extreme temperatures, dirt, contamination, vibration, and shock loads...
$137.45
Plain linear bearing pillow blocks consist of mountable housings for plain bearings or bearing liners, supporting sliding straightline and rotational motion along round shafts. They are commonly used where a linear bearing must fasten directly to a machine frame or support structure, and are typically available in open or closed variants, with standard industry sizes or twin-size configurations for added bearing surface and support. PBC Linear aluminum pillow block bearings are self-aligning, allowing the inserted bearing to tilt slightly within the aluminum alloy housing. This helps compensate for minor shaft deflection or slight parallel shaft misalignment, reducing binding, edge loading, and uneven wear. The products listed below use inserted self-lubricating Simplicity® Linear Plain Bearings with bonded FrelonGOLD® liners for oil-free, maintenance-free operation through dirt, contamination, vibration, shock loads, washdowns, and temperature extremes. Stainless steel variants are not self-aligning, but are available with inserted stainless steel-shelled bearings for washdown, corrosion-sensitive, food, and drug machinery. Frelon®J liners are FDA compliant for food and drug handling equipment, while Frelon®W is available for direct food-contact applications. Standard-size pillow block bearings include 4 mounting holes, while twin-size pillow block bearings include 8 mounting holes for direct fastening and industry-standard compatibility. For ball bearing pillow blocks, click here. For ball bearing pillow blocks, not shown in the gallery below, click here .
Plain Linear Bearing specifications (aluminum housing variant):
- Self-aligning, which allows the inserted bearing to tilt slightly within the housing
- Compensates for up to 1/2° misalignment from centerline in all directions
- Reduces binding from minor shaft deflection or parallel shaft misalignment
- Precision and compensated ID running clearance options
- Self-lubricating FrelonGOLD® liner for maintenance-free operation in harsh conditions
- Static load capacities up to 23,100 lb (103,000 N) for demanding linear motion applications
- Operating temperature range from -400°F to 400°F (-240°C to 204°C)
- Optional liners include chemical-resistant Frelon®J and FDA-compliant Frelon®W
- Stainless-steel options available for food, drug handling, washdown, and corrosion-sensitive applications
- Offered in single and twin bearing lengths for standard or extended bearing support
- Available in open and closed housing styles for use with supported or unsupported shafting
- Open housings provide clearance for rail-supported shafts and profiled rails
- Closed housings are used with end-supported or unsupported round shafts
- Bonded-liner plain bearing design helps resist contamination, vibration, shock loads, and harsh operating conditions
Categories of plain bearing pillow blocks: Plain Closed Single Pillow Block Bearings, Plain Open Single Pillow Block Bearings, Twin Sized Plain Closed Pillow Block Bearings, Twin Sized Plain Plain Open Pillow Block Bearings, Linear Ball Bearing Pillow Blocks
Frequently Asked Questions
What is a self-aligning pillow block bearing?
A self-aligning pillow block bearing allows the bearing insert or bearing body to pivot slightly within the mounted housing. This helps compensate for minor shaft deflection or parallel shaft misalignment.
Why does self-alignment matter in a pillow block bearing?
Self-alignment helps reduce binding, edge loading, and uneven wear when shafts are not perfectly parallel. It can make installation more forgiving and improve motion quality in assemblies with slight alignment variation.
What is a linear pillow block bearing?
A linear pillow block bearing is a mounted bearing assembly that supports a round shaft while allowing smooth linear motion. The bearing is held inside a block-style housing that can be fastened to machinery, frames, or support structures.
What is the advantage of a pillow block bearing housing?
A pillow block bearing housing makes the bearing easier to mount and align. Instead of installing a loose bearing into a custom-machined bore, the bearing is supplied in a ready-to-mount housing with pre-positioned mounting holes.
What does open-shell pillow block bearing mean?
An open-shell pillow block bearing has an opening along the bearing body. This gives clearance for rail-supported shafts and profiled rails where the shaft is supported from underneath.
When should an open pillow block bearing be used?
An open pillow block bearing is commonly used with fully supported shafting. The opening in the bearing and housing allows the bearing to travel along the shaft while clearing the shaft support rail.
What is compensated running clearance?
Compensated running clearance means the bearing is sized with intentional clearance between the bearing liner and shaft. This helps provide smooth motion while allowing for normal shaft and bearing tolerances.
What are plain pillow block bearings used for?
Plain pillow block bearings are used to support a round shaft while allowing linear sliding motion. They are commonly used in machinery, automation equipment, packaging systems, fixtures, guides, and other applications that require mounted linear travel.
How are plain pillow block bearings different from rolling element pillow block bearings?
Plain pillow block bearings slide on the shaft using a bearing liner, while rolling element pillow block bearings use balls or rollers to reduce friction. Plain pillow block bearings are often chosen for harsh conditions, contamination, vibration, shock loads, and low-maintenance operation because they do not require regular greasing. Rolling element pillow block bearings are often preferred for higher speeds, lower friction, and applications that require cantilevered load support, but they typically require regular lubrication and can be vulnerable to seizing, brinelling, or raceway damage under vibration, shock loads, or contamination.
Do plain pillow block bearings require lubrication?
Many plain pillow block bearings use self-lubricating liners that do not require external oil or grease for normal operation. This can reduce maintenance and help avoid problems caused by lubricant washout or contamination buildup.
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