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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
9 in stock
Ball screw support bearing, 40 x 90 x 20 mm, 60° contact angle, ABEC 7, open, resin cage. C0r 130 kN, −40 to +120 °C.
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$152.15
9 in stock
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| MFR / Brand | NTN |
|---|---|
| MPN | BST40X901BP4 |
| Model | BST 40X90 1BP4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 40 mm |
| OD | 90 mm |
| Width | 20 mm |
| Material | High Carbon Chrome Steel |
|---|---|
| Series | BST Series |
| Lubricant | Oil |
| Base Number | BST40X90-1B |
| Total Width | 20 mm |
| Bore Shaft Size | 40 mm |
| Mpn Variants | BST40X901BP4, BST40X90-1B-P4, BST-40X90-1B-P4, BST40X90-1B |
| Precision Class | P4 (ABEC 7) |
| Additional Attributes | Inner ring face diameters d1: 64.8 mm / 75.2 mm; outer ring face diameters d2: 59.1 mm / 81.6 mm; D1 75.2 mm; D2 81.6 mm; chamfer r 1.0 mm; r1 0.6 mm; space capacity single row 12.0 cm3; bore type round; configuration one row |
| Min Temp | -40 °C |
| Dynamic Load Rating | 58.5 kN (13,200 lbf) |
| Static Load Rating | 130 kN (29,200 lbf) |
| Precision Rating | ABEC 7 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Cage Material | Resin |
| Limiting Speed | 4000 rpm |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.5028 |
| Contact Angle | 60° |
| Cross Reference 1 | BST40X90-1B |
|---|
NTN BST40X90-1B-P4 is a single angular contact thrust ball bearing for ball screws. Bore: 40 mm. Outside Diameter: 90 mm. Width: 20 mm. Contact Angle: 60°. Precision Class: P4, ABEC 7. Bore Type: Round. Cage Type: Molded. Cage Material: Resin. Rolling Elements: Steel balls. Bearing Material: High carbon chrome steel. Closure Type: Open. Minimum Operating Temperature: −40 °C. Maximum Operating Temperature: 120 °C.
BST — NTN’s angular contact thrust ball bearing series for ball screw support.
40X90 — 40 mm bore, 90 mm outside diameter.
1B — single-row open execution in the BST range, 20 mm wide.
P4 — ISO Class 4, ABEC 7 precision.
Static Load Rating (C0r): 130 kN (29,200 lbf). Dynamic Load Rating (Cr): 58.5 kN (13,200 lbf). Space Capacity, single row: 12.0 cm³ (0.4724 in³). A 60° contact angle throws almost the whole ball load into the axial direction, which is what a ball screw needs: the screw pushes and pulls along its own axis and the support bearing has to hold that thrust without letting the screw wander. The steep angle is also why the static rating sits well above the dynamic rating on this family. ABEC 7 tolerances keep the screw end running true, which is what holds positioning accuracy on a machine tool axis.
Inner Ring Face Diameters (d1): 64.8 mm and 75.2 mm. Outer Ring Face Diameters (d2): 59.1 mm and 81.6 mm. Housing Abutment Diameter (D1): 75.2 mm. Second Housing Abutment Diameter (D2): 81.6 mm. Chamfer (r): 1.0 mm. Chamfer (r1): 0.6 mm.
Single bearing, 1 Pc. NTN lists the configuration as one row; two or more can be stacked in tandem on the same screw end to multiply axial capacity.
The same bearing is written BST40X901BP4, BST40X90-1B-P4, BST40X90-1B and BST-40X90-1B-P4. The 40 x 90 x 20 mm BST envelope is specific to ball screw support duty; an ordinary 40 mm angular contact bearing of similar outside diameter runs a shallower contact angle and will not hold the same thrust, so it is a different product rather than a substitution.
$137.64
92 in stock
$137.64
92 in stock
Rockwell’s own product page for the Kinetix 6000 is down
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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