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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
Inch-series super precision angular contact ball bearing, 2-3/4 x 4-3/4 in, phenolic machined cage, 300 lbf preload, universally ground duplex set.
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$328.28
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| MFR / Brand | Fafnir |
|---|---|
| GTIN | 087796069879 |
| Model | MM 155 EX CR DU 300# |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 2.7500 in |
| OD | 4.7500 in |
| Width | 1.1250 in |
| Base Number | MM155EX |
|---|---|
| Total Width | 2.2500 in |
| Overall Width | 1.1250 in |
| Mpn Variants | MM155EXCRDU / MM155EX CR DU 300 / MM 155 EX CR DU 300# / MM155EX DU300 |
| Distributor Stock Numbers | Applied Industrial Technologies 101020886 |
| Arrangement Configuration | Duplex set (DU), universally ground, 300 lbf preload |
| Precision Class | ABEC 7/9 / P4S |
| Material | Bearing Steel |
| Cage Type | Machined window |
| Precision Rating | ABEC 7/9 / P4S |
| Series | MM155 |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Internal Clearance | N/A |
| Lubricant | grease or oil |
| Preload | 300 lbf |
| Design Units | Inch |
| Bearing Material | Bearing Steel |
Fafnir MM155EX-CR-DU 300 super precision angular contact ball bearing on inch boundary dimensions, supplied as a factory-matched duplex set. Bore Diameter: 2.7500 in. Outside Diameter: 4.7500 in. Overall Width: 1.1250 in. Total Width: 2.2500 in across the mounted set. Precision Class: ABEC 7/9 / P4S. Cage Material: Phenolic. Cage Type: Machined window. Rolling Elements: Ball. Bearing Material: Bearing Steel. Bore Type: Straight, inch. Closure Type: Open. Number Of Rows: 1. Preload: 300 lbf. Design Units: Inch. Series: MM155. Base Number: MM155EX. GTIN: 087796069879.
MM — Fafnir super precision machine tool spindle range, ABEC 7/9 class.
155 — inch-series size code, giving the 2-3/4 in bore and 4-3/4 in outside diameter.
CR — phenolic cage.
DU — duplex set, universally ground so the faces are flush.
300 — 300 lbf preload, built into the ground offset.
Preload: 300 lbf. The preload is ground into the ring faces at the factory, so the set reaches its designed stiffness when the rings are simply clamped up solid. Internal Clearance: N/A — the set runs under preload.
Precision Class: ABEC 7/9 / P4S. Axial running tolerances are held to the tighter ABEC 9 / ISO P2 grade, with the remaining features to ABEC 7 / ISO P4. That axial control is what holds tool position on a machine tool spindle.
Cage Material: Phenolic. Cage Type: Machined window. A machined phenolic window cage is light, damps cage chatter and carries lubricant in the resin, which is why it is the standard cage on high-speed spindle duty. Lubricant: grease or oil.
Unit Quantity: 2 Pcs. The two bearings are universally ground with flush faces, so they butt solid and take up the 300 lbf preload without shimming. Mounted stack height 2.2500 in.
This is an inch-dimension execution on a 2-3/4 in bore, a size the metric ISO 70 and 72 series do not land on, so the Fafnir number is the designation to specify: MM155EX-CR-DU 300 identifies the bearing, its cage and its preload exactly. Searchable forms: MM155EXCRDU, MM155EX CR DU 300, MM 155 EX CR DU 300#, MM155EX DU300.
$137.64
92 in stock
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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