store Central Surplus Bearing Finder
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Availability:
9 in stock
Matched duplex pair of angular contact ball bearings, 90 mm bore x 140 mm OD x 24 mm wide, 15° contact angle, medium preload, ABEC 7. 2 Pcs.
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$305.98
9 in stock
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| MFR / Brand | RHP |
|---|---|
| MPN | 7018CTDUMP4 |
| Model | 7018-C-T-DUM-P4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 90 mm |
| OD | 140 mm |
| Width | 24 mm |
| Material | Chrome Steel |
|---|---|
| Series | 7000 |
| Lubricant | Oil |
| Base Number | 7018 |
| Industry Terms | angular contact bearing, spindle bearing pair, duplex set, precision ball bearing, matched pair |
| Common Misspellings | 7018CTDUMP-4, 7018 CT DUM P4, RHP 7018CTDUM P4, 7018CTDUNP4 |
| Application Types | machine tool spindles, grinding spindles, milling heads, precision gearboxes |
| Bore Shaft Size | 90 mm (3.5433 in) |
| Mpn Variants | 7018CTDUMP4, 7018-C-T-DUM-P4, 7018 C T DUM P4, 7018C, 7018CTDUM |
| Rolling Elements | Ball |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Part Number | 7018CTDUMP4 |
RHP 7018-C-T-DUM-P4, a matched duplex pair of single-row angular contact ball bearings. Boundary dimensions 90 mm bore × 140 mm outside diameter × 24 mm width per bearing.
70 – single-row angular contact ball bearing, ISO dimension series 10
18 – bore code, 18 × 5 = 90 mm bore
C – 15° contact angle in the RHP scheme
T – phenolic cage
DU – duplex, a pair ground to run together
M – medium preload
P4 – ABEC 7 precision class
A 15° contact angle favours speed and radial stiffness over thrust capacity, which is why it is the usual machine-tool spindle angle. Mounted as a duplex pair the set locates the shaft in both directions and runs under a built-in medium preload, so the ring faces are ground with a matched offset and the two bearings clamp against each other rather than against a shim stack. Medium preload raises axial and radial stiffness above a light-preload set and generates more heat at the same speed. ABEC 7 controls bore, outside diameter and running accuracy to super-precision limits.
Bore: 90 mm (3.5433 in)
Outside diameter: 140 mm (5.5118 in)
Width: 24 mm (0.9449 in) per bearing
Total width mounted: 48 mm (1.8898 in)
Contact angle: 15°
Rows: 1 per bearing
Preload: medium (M)
Precision class: P4 (ABEC 7), RHP equivalent EP7
Cage: phenolic
Closure: open
2 Pcs, one matched duplex pair.
The pair goes on as a unit with the ground faces together, in the orientation marked on the outer rings, so the preload is set by the grinding rather than by clamp-up force. Clamping the inner rings solid against a shaft nut and the outer rings against the housing shoulder is what develops the designed preload. Splitting the pair across two positions loses the matching.
Same-spec 15° medium-preload duplex equivalents in other schemes: Fafnir 2MM9118WI-CR-DUM, RHP B-series B7018X2TADUMEP7, NSK 7018CTRDUMP4, FAG B7018-C-T-P4S-UM. Light-preload DUL and heavy-preload DUH forms, the 25° 7018-E form, and single SU bearings are related sizes in the same envelope rather than interchanges.
$552.01
3 in stock
$552.01
3 in stock
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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