Linear Bearing Square Flanged SFP

Plain Linear Bearings in Standard Square Flanged Housings

A single Simplicity™ plain linear bearing inserted into a square flanged mount provides a compact, rigid bearing assembly for linear, rotational, and oscillating motion on round shafting. The square flange mounts directly to a machine plate, frame, or structure, while the inserted bearing creates the bonded internal bore surface that supports the shaft without recirculating balls or other rolling elements. The inserted bearing features a self-lubricating FrelonGOLD® liner bonded directly to the bearing ID for smooth, maintenance-free motion without metal-on-metal contact. This construction is well suited to demanding applications involving dirt, contamination, vibration, shock, welding splatter, washdowns, extreme heat or cold, and operating conditions where bearing replacement and machine downtime are costly. Optional Frelon® J is available for corrosive chemical environments, while FDA-compliant Frelon® W is available for food and pharmaceutical applications.

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10 products
Square Flanged Plain Linear Bearing with a 3/4" 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..
$81.15
Plain Linear Bearing with a Square Flange and a 3/4" precision 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. Precision running clearance on the inner diameter..
$81.15
Square Flanged Plain Linear Bearing, standard sized, with a 1/2" compensated ID, and featuring a self-lubricating FrelonGOLD® bearing liner that operates effectively in harsh conditions, providing oil-free operation.  Compensated running clearance on the inner diameter 0.0015” per side Spherical 'Self-aligning' I.D. in the housing. Self-aligning housing Standard Width Square Flange..
$70.41
Plain Linear Bearing with a Square Flange and a 1.25" precision 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. Precision running clearance on the inner diameter..
$183.08
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
Plain Linear Bearing with a square flange and a 1/2" precision 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. Precision running clearance on the inner diameter..
$70.41
Square Flanged Plain Linear Bearing with a 1.25" 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..
$183.08
Plain Linear Bearing with a square flange and a 1" precision 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. Precision running clearance on the inner diameter..
$110.74
Square flanged plain linear bearing with a 3/8" ID, a compensated running clearance, and a standard-size aluminum housing containing an inserted self-aligning linear bearing with a self-lubricating FrelonGOLD® liner. The flange allows secure mounting to a machine frame or plate, while the self-aligning bearing helps accommodate minor shaft misalignment and..
$93.45
Plain Linear Bearing with a square flange and a 3/8" precision 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. Precision running clearance on the inner diameter..
$93.45

Plain Linear Bearings in Standard Square Flanged Housings

10 products

A single Simplicity™ plain linear bearing inserted into a square flanged mount provides a compact, rigid bearing assembly for linear, rotational, and oscillating motion on round shafting. The square flange mounts directly to a machine plate, frame, or structure, while the inserted bearing creates the bonded internal bore surface that supports the shaft without recirculating balls or other rolling elements.

The inserted bearing features a self-lubricating FrelonGOLD® liner bonded directly to the bearing ID for smooth, maintenance-free motion without metal-on-metal contact. This construction is well suited to demanding applications involving dirt, contamination, vibration, shock, welding splatter, washdowns, extreme heat or cold, and operating conditions where bearing replacement and machine downtime are costly. Optional Frelon® J is available for corrosive chemical environments, while FDA-compliant Frelon® W is available for food and pharmaceutical applications.


  • Single Simplicity™ plain linear bearing inserted into a square flanged mount
  • Compact, rigid mounting for round-shaft linear motion systems
  • Bonded internal bore surface supports linear, rotational, and oscillating motion
  • Square flange mounts directly to a machine plate, frame, or structure
  • Self-lubricating FrelonGOLD® liner for maintenance-free, oil-free operation
  • No metal-on-metal contact, recirculating balls, or rolling elements
  • Optional Frelon® J for corrosive chemical environments
  • Optional FDA-compliant Frelon® W for food and pharmaceutical applications
  • Temperature range: -400°F to +400°F (-240°C to +204°C)
  • Designed for dirt, contamination, vibration, shock, welding splatter, and washdown environments
  • Suitable for applications where bearing replacement and downtime are costly

Frequently Asked Questions

What is the difference between a linear bearing inserted into a housing and a plain bearing liner bonded directly to the housing?
An inserted-bearing assembly uses a separate finished linear bearing installed inside a housing or mount. A directly lined housing bonds the plain bearing liner to the housing ID itself, so the housing becomes the bearing surface. Inserted bearings can simplify replacement and use established bearing sizes, while directly bonded housings reduce component count and can provide a more compact integrated design.
What is the difference between a bonded plain bearing liner and an injection-molded bearing surface?
A bonded liner is a separate bearing material attached directly to the housing or bearing ID with an adhesive bonding process. An injection-molded bearing surface is formed by molding polymer material into or around the bearing structure. Bonded liners such as Frelon® provide a continuous low-friction sliding surface, while injection-molded designs depend on the molded polymer formulation and geometry for their bearing properties.