store 
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:
1 in stock
Matched duplex pair of angular contact spindle bearings, 55 x 120 x 29 mm each, 25° contact angle, ABEC 7 / P4, phenolic cage, light preload (DUL).
List Price
$107.02
1 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM311WI DUL |
| Model | 3MM311WIDUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 55 mm |
| OD | 120 mm |
| Width | 29 mm |
| Material | Bearing Steel |
|---|---|
| Series | 300 |
| Base Number | 7311 |
| Industry Terms | Spindle bearing, machine tool bearing, precision duplex pair, matched set angular contact |
| Common Misspellings | Fafner, Faffnir, Fafnier, 3MM311W1, 3MM311-WI DUL |
| Application Types | Machine tool spindles, grinding spindles, high-speed gearboxes, precision rotary tables |
| Bore Shaft Size | 55 mm |
| Mpn Variants | 3MM311WI-DUL, 3MM311WIDUL, 3MM-311-WI-CR-DUL, 3MM311WI CR DUL, 3 MM 311 WI DUL |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Number Of Rows | 1 per bearing (duplex pair) |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.68 |
| Contact Angle | 25° |
| Part Number | 3MM311WI-DUL |
Matched duplex pair of Fafnir 3MM311WI angular contact spindle bearings, universally ground for light preload (DUL). Unit Quantity: 2 Pcs. Each bearing is 55 mm bore x 120 mm OD x 29 mm wide, and the pair stacks to 58 mm overall.
3MM — Fafnir super-precision series at a 25° contact angle; MM is the P4 precision class.
311 — ISO 7311 envelope, 55 x 120 x 29 mm.
WI — Fafnir spindle bearing design with low shoulders on both rings.
CR — phenolic cage.
DUL — duplex, universally ground, light preload.
Bore Diameter: 55 mm. Outside Diameter: 120 mm. Width: 29 mm per bearing. Total Width: 58 mm as a pair. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Cage Material: Phenolic. Preload: Light. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Closure Type: Open. Bore Type: Straight.
Mounting Arrangement: universally ground rings, arranged back-to-back (DB), face-to-face (DF) or in tandem (DT) with the light preload retained.
ISO 7311 envelope at 25°. Also written 3MM311WIDUL, 3MM311WI CR DUL and 3 MM 311 WI DUL. 2MM311WI — same envelope at 15°. DUM and DUH — same bearing with medium and heavy preload.
Contact angle is 25°, set by the 3MM series.
DUL is a universally ground duplex pair with light preload.
Each bearing is 55 mm bore, 120 mm OD and 29 mm wide; the pair stacks to 58 mm.
$760.47
16 in stock
$111.47
35 in stock
If you pulled a bearing off general industrial equipment at random, there’s a good chance
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
When an HMI panel goes dark or a PLC module stops communicating, the machine it
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
Sort
Brand
Price
MPN
Categories
