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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
2 in stock
Ball screw support bearing, 60° contact angle, 1-1/2 in x 72 mm x 5/8 in, heavy preload, ABEC 7, single universally ground, open, straight bore.
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$72.00
2 in stock
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| MFR / Brand | RHP |
|---|---|
| Model | BSB 150 SUH P4 / BSB150 UH EP7 |
| Bearing Type | Ball Screw Support Bearing, Open |
| ID | 1-1/2 in |
| OD | 72 mm |
| Width | 5/8 in |
| Base Number | BSB150 |
|---|---|
| Industry Terms | Ball screw support bearing; ballscrew thrust bearing; 60 degree thrust bearing |
| Common Misspellings | BSB 150SUHP4; BSB150-SUH-P4; BSB150SUH P4 |
| Bore Shaft Size | 1-1/2 in (38.1 mm) |
| Mpn Variants | BSB-150-SUH-P4; BSB 150 SUH P4; BSB150 UH EP7; MM9310WI2; 38TAC72 |
| Series | BSB Series |
| Rolling Elements | Balls |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Part Number | BSB150SUHP4 |
| Cross Reference 1 | NSK 38TAC72B - 38 mm metric bore, not 1-1/2 in |
|---|
RHP BSB150SUHP4 ball screw support bearing. Series: BSB. Base Number: BSB150. Bore / Shaft Size: 1-1/2 in (38.1 mm). Outside Diameter: 72 mm (2.8346 in). Overall Width: 5/8 in (15.875 mm). Number Of Rows: 1. Rolling Elements: Balls. Closure Type: Open. Bore Type: Straight.
BSB — Contact Angle: 60°, set by the BSB ball screw support family.
SU — single universally ground, so any two bearings of the same designation stack directly against one another.
H — Preload: Heavy.
P4 — Precision Class: P4, equivalent to ABEC 7.
Searchable forms of the number: BSB150SUHP4, BSB-150-SUH-P4, BSB 150 SUH P4, BSB150 SUH P4.
The 60° contact angle is what separates a ball screw support bearing from an ordinary angular contact bearing: the steep raceway puts almost the whole ball load along the shaft axis, giving high axial stiffness and holding a loaded ballscrew in position. Heavy preload raises axial stiffness further and tightens repeatable positioning, which is what a machine-tool feed screw is set up for. P4 tolerances hold running and axial runout close, so the screw stays concentric under load.
Unit Quantity: 1 Pc. Universally ground faces allow single, duplex or stacked mounting. Preloaded execution, so the bearing is supplied set rather than clearance-graded.
NSK 38TAC72B is a 38 mm metric-bore ball screw support bearing at 60° with a 72 mm outside diameter. MPN Variants recorded on this part: BSB150 UH EP7, MM9310WI2, 38TAC72. The light-preload execution of the same bearing is a BSB150SULP4.
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