Motor Starters vs. Contactors vs. Overload Relays: What Each One Does and Why You Need All Three
When a motor stops running, the first instinct is to find the part that looks
Availability:
2 in stock
Matched pair of super-precision angular contact ball bearings, 130 x 230 x 40 mm, open, machined phenolic cage, medium preload, EP7 / ABEC 7 precision.
List Price
$2,646.87
2 in stock
2 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
Also Available From:
| MFR / Brand | RHP |
|---|---|
| MPN | 7226TDUMP4 |
| Model | 7226 T DUM P4 / B-7226-T-P4S-DUM / MM9126 WI CR DUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 130 mm |
| OD | 230 mm |
| Width | 40 mm |
| Material | Chrome Steel |
|---|---|
| Series | 7200 |
| Condition | New |
| Preload | Medium |
| Total Width | 80 mm (3.1496 in) across the pair |
| Base Number | 7226 |
| Industry Terms | Spindle bearing; super-precision angular contact bearing; duplex matched pair; large machine tool spindle bearing |
| Common Misspellings | 7226T DUM P4; 7226-TDUM-P4; RHP 7226 TDUMP4 |
| Application Types | Large machine tool spindles; boring mills; vertical turning centres; precision rotary tables |
| Bore Shaft Size | 130 mm (5.1181 in) |
| Mpn Variants | 7226TDUMP4; 7226-T-DUM-P4; 7226 T DUM P4; B-7226-TA-DUM-EP7; B7226TADUMEP7; B-7226-T-P4S-DUM; MM9126WI CR DUM; MM9126 WI CR DUM |
| Rolling Elements | Steel balls |
| Number Of Rows | 1 per bearing, 2 rows across the pair |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Part Number | 7226TDUMP4 |
RHP 7226TDUMP4 super-precision angular contact ball bearings, matched pair, single row each, open. Bore: 130 mm. Outside diameter: 230 mm. Width: 40 mm per bearing. Precision: EP7, equivalent to ABEC 7 and ISO Class 4. Series: 72, light section. Contact angle: not specified.
7226: 130 mm bore in the ISO 72 dimension series. T: machined laminated phenolic cage, outer-ring guided, rated to 120 °C. DUM: duplex universally ground pair at medium preload. P4: EP7 precision, ABEC 7. The carton also carries the RHP B-series form B-7226-TA-DUM-EP7, where TA is the same phenolic cage and EP7 the same class, and the Fafnir form MM9126 WI CR DUM, where CR is a phenolic outer-land-riding cage.
EP7 is the ABEC 7 class: bore, outside-diameter, width and runout are held to super-precision tolerances, which is what makes a matched pair hold its preload predictably. Medium preload sits between light and heavy on the stiffness ladder, giving more axial rigidity and better position control than light preload at the cost of more running torque and heat. The outer-ring-guided machined phenolic cage runs to 120 °C and suits both grease and oil-air lubrication; its low mass and low friction coefficient are what make it standard on high-speed spindle bearings.
Two pieces, supplied as the DUM matched pair. Universally ground, so they mount back-to-back, face-to-face or in tandem and reach medium preload on assembly without shims. Stacked width across the pair: 80 mm.
Straight bore, open on both faces, so lubrication and sealing come from the spindle design. Interference on the inner ring and a located outer ring are the normal arrangement for a preloaded pair.
Same envelope, 130 x 230 x 40 mm, in other schemes: SKF 7226 CD/P4A and FAG B7226-C-T-P4S-DUM, both 15° executions, and Fafnir MM9126WI CR DUM. Written forms in circulation: 7226TDUMP4, 7226 T DUM P4, 7226-T-DUM-P4, B-7226-TA-DUM-EP7, B7226TP4SDUM.
$43.50
29 in stock
$95.00
148 in stock
A shipping cutoff banner measures a vendor’s dock. It tells
When a motor stops running, the first instinct is to find the part that looks
From Caligula’s luxury fleet to modern factories, this is the story of how a single
When sourcing a replacement bearing, you will often find both Timken and SKF options for
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
