Twin Linear Ball Bearing Pillow Blocks - Closed
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Linear ball bearing pillow block with two inserted 1.25" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$262.71
Linear ball bearing pillow block with two inserted 1" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$175.24
Linear ball bearing pillow block with two inserted 3/4" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$122.03
Linear ball bearing pillow block with two inserted 1/2" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$103.39
Linear ball bearing pillow block with 5/8" bore, closed shell, and two Precision Plus® self-aligning bearings mounted inside an aluminum alloy housing. The twin bearing arrangement provides a longer bearing span for improved load support and stability. Precision Plus® bearings use floating internal raceway elements to accommodate minor shaft and..
$179.01
Linear ball bearing pillow block with two inserted 1.5" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$333.79
Double-size ball bearing pillow block, closed shell, with 1/2" bore, using a self-aligning bearing inside an aluminum alloy housing. The double-length bearing is roughly equal to two standard bearings mounted end to end. Self-aligning ball tracks accommodate minor misalignment, and two side-mounted grease zerk fittings provide lubrication access. Heat-treated alloy..
$167.99
Linear ball bearing pillow block with two inserted 2" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$474.74
Linear ball bearing pillow block with two inserted 5/8" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$115.61
Linear ball bearing pillow block with two inserted 3/8" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$96.05
Linear ball bearing pillow block with two inserted 1/4" ID closed-shelled standard-size bearings mounted back to back inside a double aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable,..
$91.94
Twin linear ball bearing pillow block with a 1.5" bore, closed shelled, using two Precision Plus® self-aligning bearings inside an aluminum alloy housing. The closed-shell design is intended for end-supported round shafts, while the twin bearing arrangement provides a longer bearing span for increased load support and stability. Precision Plus®..
$528.53
Linear ball bearing pillow block, closed shelled, with 1.25" bore and two Precision Plus® self-aligning bearings mounted back to back inside an aluminum alloy housing. The twin bearing arrangement provides a longer bearing span for improved load support and stability. Precision Plus® bearings use floating internal raceway elements that can..
$412.70
Twin linear ball bearing pillow block, closed-shelled, with two 3/4" Precision Plus® self-aligning bearings mounted back to back inside an aluminum alloy housing. The self-aligning design uses floating internal raceway elements that can shift slightly to accommodate minor shaft and housing misalignment while maintaining smooth rolling contact. Linear ball bearings..
$192.67
Twin linear ball bearing pillow block, closed shelled, with two 1" Precision Plus® self-aligning bearings mounted back to back inside an aluminum alloy housing. The self-aligning design uses floating internal raceway elements that can shift slightly to accommodate minor shaft and housing misalignment while maintaining smooth rolling contact. The twin..
$280.56
Double linear ball bearing pillow blocks place two standard-size linear ball bearings back to back inside a single aluminum alloy housing. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable, low-friction motion with reduced operating noise. The increased bearing span provides greater load support and stability than a single bearing arrangement, making these pillow blocks well suited to cantilever, overhung-load, and offset-load applications. Linear ball bearings also tolerate drive forces without the same 2:1 binding limitation that applies to plain linear bearings. IPPW Series pillow blocks use standard closed linear ball bearings for end-supported round shafts, while IPPSW Precision Plus® versions add self-alignment through floating internal ball raceways that can shift slightly to accommodate minor shaft and housing misalignment while maintaining smooth rolling contact. Double seals are included as standard for contaminant protection, and IPPSW versions include two grease zerk fittings for lubrication access.
- Double linear ball bearing pillow blocks with two standard-size bearings mounted back to back
- Closed-shelled, double-wide (twin) design for end-supported round shafts
- Only available in inch sizes
- ID sizes: 0.25" to 2"
- Static load capacities up to 3,400lb (15,800N)
- Dynamic load capacities up to 1,700lb (7,600N)
- Heat-treated alloy steel bearing shells for durability
- Low coefficient of friction for smooth, efficient linear motion
- Polymer resin retainers help reduce operating noise
- Double seals included as standard for lubricant retention and contaminant protection
- Temperature range: -4°F to 176°F (-20°C to 80°C)
- Requires external lubrication for proper bearing performance and service life
- Recommended lubrication: ISO VG 32–68 turbine oil or No. 2 lithium-based soap grease
- Lubricate the bearing and shaft before first use
- Periodic re-lubrication depends on load, speed, stroke, temperature, and contamination
- Increased bearing span provides greater load support and stability
- Well suited to cantilevered and offset-load applications
- Handles drive forces without the same 2:1 binding limit as plain bearings
- Interchangeable with industry-standard sizes and Simplicity® plain bearings
- Super Ball Bearing versions also available
- Precision Plus® self-aligning versions use floating ball raceways
- Floating ball raceways accommodate minor shaft and housing misalignment
- IPPSW Precision Plus® twin versions include two grease zerk fittings for re-lubrication
Frequently Asked Questions
What is a cantilevered load?
A cantilevered load is supported from one side while extending outward from the bearing or support structure. This creates a moment that tries to rotate or tip the bearing assembly.
What is an offset load?
An offset load acts away from the bearing centerline instead of directly through it. The offset creates a moment and can increase the risk of binding in some linear bearing systems.
What is an overhung load?
An overhung load is positioned beyond the bearing or support point, so the load extends outward and creates a turning moment on the bearing assembly.
What is the difference between cantilevered, offset, and overhung loads?
Cantilevered and overhung loads both describe loads that extend outward from their support and create a moment. Offset load is a broader term for any load or drive force that acts away from the bearing centerline. A cantilevered or overhung load is therefore often also an offset load.
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