Bearing units
Bearing units combine a rolling bearing with a housing (bearing block) into one assembly, which is bolted to a machine frame or base to support a rotating shaft. A representative type incorporates an insert bearing with a spherical outer ring (Y-bearing), and the spherical fit with the housing absorbs shaft tilt caused by mounting error. Housings include pillow block, square flange, and diamond flange types, and the shaft is fixed by set screws, adapter sleeves, or eccentric collars. Besides conveyors and general industrial machinery, there are application-specific products such as high-temperature and ultra-low-temperature versions, units for supporting precision ball screws, and water-cooled split-type units for continuous casting equipment.
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Bearing units
Bearing Unit for Plate Levelers
A bearing unit for plate levelers designed for harsh environments involving heavy loads, rust, and water or foreign matter ingress.
JTEKT Corporation
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Bearing units
Bearing Unit for Tension Leveler
Bearing unit for tension levelers supporting high-speed rotation, wet and dry environments, and low torque.
JTEKT Corporation
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Bearing units
Half-Ring Type Split Bearing Unit (HSC Bearing)
Half-ring type split bearing unit. Compact sealed structure and high cooling efficiency; heavy-load product.
JTEKT Corporation
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Bearing units
Support Bearing Unit for Precision Ball Screws BSU1747BDF
Model: BSU1747BDF
Bearing unit for precision ball screw support incorporating SAC1747BDF. Housing outer diameter 60 mm, excellent dust resistance.
JTEKT Corporation
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Bearing units
Half-Ring Type Bearing Housing Unit for Continuous Casting Machines
A half-ring type bearing housing unit used for intermediate support of pinch rolls in continuous casting machines. Bore diameter class of 100 to 150 mm, with a cooling structure that rectifies water flow.
JTEKT Corporation
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Bearing units
High-Temperature Ball Bearing Unit (Square Flange Housing)
Bearing unit combining a high-temperature insert bearing with a square flange housing. Metric bore diameters of 20 to 60 mm.
SKF
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Bearing units
High-Temperature Ball Bearing Unit (Cast Pillow Block Housing)
Bearing unit combining a cast pillow block housing with high-temperature insert bearing. Available in metric and inch series with bore diameters of 20 to 60 mm.
SKF
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Bearing units
High-Temperature Ball Bearing Unit, Square Flange Housing, Inch Series (VA201/VA228)
Inch-series square flange ball bearing unit for use in high-temperature environments. Available in two heat-resistant specifications, VA201 (130 to 250°C) and VA228 (260 to 350°C), and requires no relubrication.
SKF
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Bearing units
High-Temperature Ball Bearing Unit, Diamond-Shaped Flange Housing, Metric Series (VA201/VA228)
Metric diamond-shaped flange ball bearing unit for use in high-temperature environments. Available in heat-resistant VA201 and VA228 specifications; no re-greasing required.
SKF
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Bearing units
High-Temperature Ball Bearing Unit, Diamond Flange Housing, Inch Series (VA201/VA228)
Inch-series diamond flange ball bearing unit for use in high-temperature environments. Available in heat-resistant VA201 and VA228 specifications; no re-greasing required.
SKF
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Bearing units
High-Temperature Insert Bearing
High-temperature insert bearing that can be fixed to the inner ring with a set screw. Available in metric and inch series with bore diameters of 20 to 60 mm.
SKF
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Bearing units
Ultra-High/Low Temperature Y-Bearing (Inch-Series Shaft)
Ultra-high/low temperature Y-bearing for inch-series shafts. Compatible with shaft diameters of 3/4 to 3 inches.
SKF
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Bearing units
Ultra-High/Low Temperature Y-Bearing (Metric Shaft)
Ultra-high/low temperature Y-bearing for metric shafts. Accommodates shaft diameters of 20 to 80 mm.
SKF
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Bearing units
SKF Ultra-High/Low Temperature Y-Bearing (Insert Bearing)
Insert-type Y-bearing for use in extreme temperature ranges. Same design as the standard YAR 2-2F series, available in VA201 and VA228 types.
SKF
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Bearing units
Standard Inner Ring Y-Bearing (Metric Shaft)
Sealed standard inner ring Y-bearing for metric shafts, accommodating shaft diameters of 17 to 60 mm.
SKF
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Bearing units
SKF ConCentra Y-Bearings (Inch Series Shafts)
Y-bearings for inch-series shafts with ConCentra mechanism, accommodating shaft diameters of 1 to 2 11/16 inches.
SKF
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Bearing units
Tapered Bore Y-Bearings with Adapter Sleeves (Inch-Series Shafts)
A set of tapered bore Y-bearings and adapter sleeves. Compatible with inch-series shaft diameters of 3/4 to 2 3/8 inches.
SKF
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Bearing units
Y-Bearings with Tapered Bore and Adapter Sleeves (Metric Shaft)
A set of Y-bearings with tapered bore and adapter sleeves. Compatible with metric shaft diameters of 20 to 60 mm.
SKF
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Bearing units
SKF ConCentra Y-Bearings (Metric Shaft)
Metric shaft Y-bearings with ConCentra mechanism. Suitable for shaft diameters of 25 to 60 mm.
SKF
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Bearing units
Y-Bearing with Eccentric Locking Collar (Inch Shaft)
Y-bearing with eccentric locking collar for inch-series shafts. Available in standard, 2F, and YELAG variants, accommodating shaft diameters from 1/2 to 2 7/16 inches.
SKF
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Bearing units
Y-Bearing SKF ConCentra (YSP)
Y-bearing using SKF ConCentra locking technology. Recommended tightening torque for set screws is in the range of 2.5 to 3 Nm.
SKF
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Bearing units
Y-Bearing with Tapered Bore (YSA)
Y-bearing with tapered bore, mounted using an adapter sleeve. Shows hook spanner dimensions and tightening angle for installation.
SKF
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Bearing units
Y-Bearing with Eccentric Locking Collar (YEL/YET/YELAG)
Y-bearing fixed to the shaft with an eccentric locking collar. Mainly metric shaft diameters of 15 to 60 mm, with sealed and agricultural variants.
SKF
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Bearing units
Y-Bearing with Set Screw (YAR/YAT/YARAG)
Y-bearing that fixes the inner ring to the shaft with set screws. Available for metric and inch shaft sizes, with many dimensions in the range of d 12 to 100 mm and 1/2 to 3 in.
SKF
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Bearing units
Y-Bearing with Set Screw Threaded Hole Specifications
Table of inner ring threaded hole nominal dimensions and thread standards by bearing size for set screw type Y-bearings.
SKF
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Bearing units
Technical Specifications of Y-Bearings (Standard Series)
Technical data for Y-bearings including set screw, eccentric collar, ConCentra locking and tapered bore types: tolerances, clearances, load calculation factors and speed limits.
SKF
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Bearing units
Y-Bearing with Tapered Bore
Y-bearing with a tapered bore, mounted with an adapter sleeve. Easy to fit even on commercially available shafts.
SKF
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Bearing units
Standard Inner Ring Y-Bearing
A spherical outer ring Y-bearing with a standard tolerance inner ring, fixed to the shaft with an interference fit. Suitable for high axial loads.
SKF
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Bearing units
SKF Stainless Steel Y-Bearing
Stainless steel Y-bearing for the food industry. Uses food-grade grease and food-compliant seals.
SKF
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Bearing units
Y-Bearing for Agricultural Applications
Y-bearing designed for harsh agricultural machinery such as combines and balers. Features 5-lip seals on both sides and VT307 grease fill to extend service life and improve resistance to wet environments. Dimensionally interchangeable with standard Y-bearings and requires no re-greasing.
SKF
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Bearing units
SKF Energy Efficient (E2) Y-bearing
An energy-saving Y-bearing with more than 50% lower friction moment than standard products. Lower operating temperature is expected to extend grease life and bearing life.
SKF
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Bearing units
SKF ConCentra Y-Bearing
A locking-resistant Y-bearing that achieves precise concentric fit on the shaft using ConCentra locking technology.
SKF
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Bearing units
Y-Bearing with Eccentric Locking Collar
Y-bearing that locks to the shaft with an eccentric locking collar. Mainly intended for applications where the direction of rotation does not change.
SKF
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Bearing units
Y-Bearing with Set Screws
A Y-bearing fixed to the shaft by two set screws positioned 120° apart on the inner ring. Also usable in applications where the direction of rotation is not constant. Available in YAT 2 with a wide inner ring on one side and YAR 2 with wide inner ring on both sides.
SKF
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Bearing units
ICOS Oil Seal Bearing Unit
Oil seal bearing unit with bore diameter of 12 to 30 mm. Dimensions, basic load ratings and limiting speeds are listed for each model number.
SKF
How to choose Bearing units
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1. Match shaft diameter and dimensional system (metric/inch)
Bearing units are offered in separate metric and inch series, and they are not interchangeable even when their appearance is similar. Listed products cover metric sizes of 3 to 150 mm and inch sizes of 1 to 4 in. First determine the shaft diameter and dimensional system, then select from the corresponding series.
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2. Check the rated load against the operating conditions
The basic dynamic load rating Cr is used for rolling fatigue life calculations, and the basic static load rating C0r is used for evaluating stationary or shock loads. Listed Cr values range from 7.28 to 793 kN, and there are heavy-load products, such as half-ring types, with increased static load ratings.
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3. Select a specification suited to the operating temperature
Standard greases and rubber seals deteriorate at high temperatures. High-temperature specifications are available in types with different upper temperature limits; for example, VA201 is rated at 130 to 250°C and VA228 at 260 to 350°C. In addition to the ambient temperature, check the permissible seal temperature and the sealed grease.
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4. Choose the shaft fixing method for the application
Set-screw type is easy to install but requires control of the tightening torque. The method that fixes the bearing with a tapered bore and adapter sleeve provides a secure connection to the shaft and suits applications with reversing rotation or vibration. Check it together with the recommended shaft tolerance grade.
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5. Verify the permissible rotational speed
Bearing units have an upper limit on usable rotational speed depending on seal friction and the fixing method. The permissible speeds of listed products range widely from 6 to 12000 r/min, and low-speed heavy-load and high-speed units have very different characteristics. Confirm that the operating speed has sufficient margin.
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6. Allow for shaft tilt during installation
In the spherical-fit design, the unit can absorb shaft tilt during installation up to a certain angle. However, in structures that allow regreasing, the permissible angle may be smaller. Listed products include an example of 2°. Check the permissible misalignment according to the accuracy of the base or frame.
This guide was written by AI based on the listed products' documents and specification items. Check each manufacturer's documents before adopting.