Twin Linear Ball Bearing Pillow Blocks - Open
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Twin linear ball bearing pillow block, open-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 open-shell design..
$307.29
Twin linear ball bearing pillow block, open-shelled, with two 1/2" Precision Plus® self-aligning bearings mounted back to back inside an aluminum alloy housing. The open-shell design allows use with rail-supported round linear shafts and profiled linear rails. Floating internal raceway elements accommodate minor shaft/housing misalignment, while two grease zerk fittings..
$179.61
Linear ball bearing pillow block with two inserted 3/4" ID open-shelled standard-size bearings mounted back to back inside an aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability, while the open design allows use with rail-supported round shafts and profiled linear rails. Heat-treated..
$137.77
Linear ball bearing pillow block with two inserted 1/2" ID open-shelled standard-size bearings mounted back to back inside an aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability, while the open design allows use with rail-supported round shafts and profiled linear rails. Heat-treated..
$113.49
Linear ball bearing pillow block with two inserted 5/8" ID open-shelled standard-size bearings mounted back to back inside an aluminum alloy housing. The twin configuration increases the bearing span for greater load support and stability, while the open design allows use with rail-supported round shafts and profiled linear rails. Heat-treated..
$130.20
Double-size linear ball bearing pillow block, open shelled, with a 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, while the open shell allows use on supported round shafts or profiled rails. Self-aligning ball..
$945.10
Linear ball bearing pillow block, open-shelled, with a 1.5" bore and two Precision Plus® self-aligning bearings mounted inside an aluminum alloy housing. The twin bearing arrangement is equal to two standard bearings mounted back-to-back, providing a longer bearing span for improved load support and stability. The open-shell design allows use..
$571.66
Twin linear ball bearing pillow block, open shelled, with a 1.25" bore, using two Precision Plus® self-aligning bearings inside an aluminum alloy housing. The open-shell design allows travel on rail-supported round shafts and profiled linear rail systems, while the twin bearing arrangement provides a longer bearing span for improved load..
$458.40
Linear ball bearing pillow block, open-shelled, with a 3/4" bore 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. The open-shell design allows use with rail-supported round linear shafts and profiled linear..
$217.52
Twin linear ball bearing pillow block, open-shelled, with two 5/8" Precision Plus® self-aligning bearings mounted back to back inside an aluminum alloy housing. The open-shell design allows use with rail-supported round linear shafts and profiled linear rails. Floating internal raceway elements accommodate minor shaft/housing misalignment, while two grease zerk fittings..
$221.49
Double open-shelled linear ball bearing pillow blocks place two standard-size linear ball bearings back to back inside a single aluminum alloy housing. The open bearing geometry provides clearance for rail-supported round shafts and profiled linear rails, while the twin arrangement increases bearing span for greater load support and stability. Heat-treated alloy steel bearing shells, recirculating hardened steel balls, and resin retainers provide durable, low-friction motion with reduced operating noise. These pillow blocks are well suited to cantilevered, overhung, and offset-load applications because linear ball bearings handle off-center forces without the same 2:1 binding limitation that applies to plain bearings. Standard IPPWN versions use conventional linear ball bearings, while IPPSWN Precision Plus® versions add self-alignment through floating internal ball raceways that accommodate minor shaft and housing misalignment. Double seals help retain lubricant and protect against contaminants, and the bearings require periodic external lubrication for proper performance and service life.
- Double linear ball bearing pillow blocks with two standard-size bearings mounted back to back
- Open-shelled design for rail-supported round shafts and profiled linear rails
- Only available in inch sizes
- ID sizes: 0.25" to 2"
- Static load capacities up to 3,000lb (13,345N)
- 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
- Resin retainers help reduce operating noise
- Increased bearing span for greater load support and stability
- Well suited to cantilevered, overhung, and offset-load applications
- Handles off-center forces without the same 2:1 binding limit as plain bearings
- Double seals standard for lubricant retention and contaminant protection
- Requires external lubrication for proper bearing performance and service life
- Recommended lubrication: ISO VG 32–68 turbine oil or No. 2 lithium soap grease
- Lubricate the bearing and shaft before first use
- Re-lubricate periodically based on load, speed, stroke, temperature, contamination
- Temperature range: -4°F to 176°F (-20°C to 80°C)
- Interchangeable with industry-standard sizes and Simplicity® plain bearings
- Precision Plus® self-aligning versions use floating ball raceways
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