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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:
1 in stock
Matched angular contact ball bearing pair, 55 x 120 x 29 mm, back-to-back, 40° contact angle, ABEC 7 precision, 58 mm total width, open.
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$289.85
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| MFR / Brand | MRC |
|---|---|
| Model | 7311 PDB |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 55 mm |
| OD | 120 mm |
| Width | 29 mm |
| Base Number | 7311 |
|---|---|
| Industry Terms | Angular contact ball bearing; matched pair; back-to-back duplex set; ABEC 7 super precision bearing; machine tool spindle bearing |
| Common Misspellings | 7311 PDB; 7311PBD; 7311-P-DB; MCR 7311PDB; ABEC7; back to back bearing pair; anglular contact bearing |
| Total Width | 58 mm |
| Overall Width | 29 mm |
| Bore Shaft Size | 55 mm |
| Mpn Variants | 7311PDB; 7311-P-DB; 7311 P DB; 7311PD |
| Arrangement Configuration | Matched pair, back-to-back (DB) |
| Precision Class | ABEC 7 / P4 |
| Precision Rating | ABEC 7 / P4 |
| Series | 7300 |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Contact Angle | 40° |
| Mounting Arrangement | Back-to-back |
| Design Units | Metric |
| Bearing Material | Chrome steel |
| Part Number | 7311PDB |
| Cross Reference 1 | SKF 7311 BECBM – single, universal, brass cage |
|---|---|
| Cross Reference 2 | FAG 7311-B-XL-TVP – single, polyamide cage |
| Cross Reference 3 | NSK 7311B – single, not matched |
| Cross Reference 4 | NTN 7311B – single, not matched |
| Cross Reference 5 | Koyo 7311B – single, not matched |
| Cross Reference 6 | RHP 7311B – single, not matched |
| Cross Reference 7 | SNR 7311B – single, not matched |
MRC 7311PDB angular contact ball bearing matched pair, 55 x 120 x 29 mm per bearing. Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 29 mm. Total Width: 58 mm. Contact Angle: 40°. Precision Class: ABEC 7 / P4. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome steel. Mounting Arrangement: Back-to-back. Design Units: Metric. Series: 7300. Base Number: 7311. Part Number: 7311PDB. Unit Quantity: 2 Pcs.
7311 — MRC 7300 medium series angular contact ball bearing, 55 mm bore.
P — counterbored outer ring, 40° contact angle.
DB — matched pair, ground for back-to-back mounting.
Contact Angle: 40°. A 40° angle carries the highest thrust load of the standard angular contact angles and runs at lower speed than a 15° or 29° execution. The counterbored outer ring is what lets the full ball complement sit against a steep raceway shoulder.
Precision Class: ABEC 7 / P4. Bore, outside diameter and running accuracy are held to super-precision limits, which is the grade machine tool spindles and precision gearboxes are specified to.
Series: 7300. The medium series carries a heavier ball set than the 7200 light series on the same bore, so it takes more load in a larger outside diameter.
Shaft seat 55 mm. Housing bore 120 mm. Ring width 29 mm each. Total Width: 58 mm across the pair. A back-to-back pair sets the two load lines diverging outward, giving a wide effective bearing span in a short housing bore and high moment stiffness. The pair takes thrust in both directions and is preloaded by the factory grind, so it clamps up solid against a common shaft shoulder and housing shoulder.
Unit Quantity: 2 Pcs. One matched back-to-back pair, faces universally ground so the set closes without shims.
Other makers’ 40° singles on the ISO 7311 envelope: SKF 7311 BECBM, FAG 7311-B-XL-TVP, NSK 7311B, NTN 7311B, Koyo 7311B, RHP 7311B, SNR 7311B. They are single bearings, while this MRC 7311PDB is a back-to-back matched pair, so a set needs two singles ordered with a matching pairing suffix. Searchable variants of the manufacturer number: 7311PDB, 7311-P-DB, 7311 P DB, 7311PD.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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