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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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1 in stock
Super-precision angular contact ball bearings, 17 x 40 x 12 mm, 25° contact angle, phenolic cage, matched duplex pair at medium preload. 2 Pcs.
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$114.33
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| MFR / Brand | RHP |
|---|---|
| MPN | 7203ETDUMP4V |
| Model | 7203 E T DUM P4V 3MM203WI DUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 17 mm |
| OD | 40 mm |
| Width | 12 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Preload | Medium (DUM) |
| Base Number | 7203 |
| Industry Terms | Spindle bearing pair; super precision angular contact; matched duplex set; machine tool bearing |
| Common Misspellings | RHP 7203 ETDUM P4V; 7203ETDUNP4V; RPH 7203ETDUMP4V |
| Application Types | Machine tool spindles; precision grinding heads; ball screw and worm drives; high-speed motion control |
| Total Width | 24 mm (pair stack height) |
| Bore Shaft Size | 17 mm (0.6693 in) |
| Mpn Variants | 7203ETDUMP4V; 7203-E-T-DUM-P4V; 7203 E T DUM P4V; 7203ETDUM |
| Arrangement Configuration | Matched duplex pair (DUM) |
| Closure Type | Open |
| Cage Type | Machined, outer ring land riding |
| Rolling Elements | Ball |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.68 |
| Contact Angle | 25° |
| Mounting Arrangement | Matched duplex, universal |
| Part Number | 7203ETDUMP4V |
A matched duplex pair of RHP 7203E super-precision angular contact ball bearings, 17 mm bore, 40 mm outside diameter, 12 mm wide each. The 7200 series is the medium section of the super-precision angular contact range and the usual choice where a small spindle has to carry a real thrust load as well as speed.
In the RHP scheme 7203 is the ISO 72-series section, E sets the contact angle at 25°, T is a phenolic resin cage, DU marks the pieces as a ground duplex set, and M is medium preload. The equivalent RHP B-series designation for the same bearing is B7203X3TADUMEP7, in which X3 reads the angle a second way as 25°.
A 25° contact angle carries more thrust and gives higher axial stiffness than a 15° at the cost of limiting speed, which suits spindles and screw drives that see substantial axial load. Medium preload sits between light and heavy: stiffer than light, with more heat generation and a lower speed ceiling. Phenolic resin rides the outer-ring land, is light and oil-absorbent, and works to about 120 °C.
Each bearing on its own takes thrust in one direction. Mounted back-to-back or face-to-face, the pair takes thrust in both directions; mounted in tandem it takes a larger load in one direction only.
The two pieces are a ground duplex set. Their ring faces are ground together as a unit, so the pair reaches the specified medium preload as ground.
Bore: 17 mm. Outside diameter: 40 mm. Width per bearing: 12 mm. Stack height for the pair: 24 mm. Bore form: straight.
2 Pcs, supplied as one matched duplex set. Stack height for the pair is 24 mm. Supplied as bare bearings.
The direct substitutes are an RHP or NSK 7203E duplex pair at medium preload with a phenolic cage, and the B-series form B7203X3TADUMEP7. A 7203C is the same 17 x 40 x 12 mm envelope at 15° and a 7203A at 30° — related sizes, not interchanges, because the angle changes stiffness and speed. Light or heavy preload sets of the same number are likewise different parts.
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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