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2 in stock
Super-precision angular contact ball bearing, 40 mm bore x 80 mm OD x 18 mm wide, 40 degree contact angle, ABEC 7, matched duplex pair at light preload. 2 Pcs.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7208TADULP4 |
| Model | 7208-TA-DUL-P4 / 7208-B / MM208 WI CR DUL |
| Bearing Type | Angular Contact Ball Bearing |
| Condition | New |
|---|---|
| Preload | Light (L) |
| Base Number | 7208 |
| Industry Terms | Super precision spindle bearing; matched duplex pair; ABEC 7 angular contact; machine tool spindle bearing |
| Common Misspellings | 7208TADULP-4; 7208 TADULP4; RHP 7208TADLP4; 7208TADUL P4 |
| Application Types | Machine tool spindles; grinding spindles; precision gearboxes; high-speed rotary tables |
| Total Width | 36 mm (1.4173 in) across the duplex pair |
| Bore Shaft Size | 40 mm (1.5748 in) |
| Mpn Variants | 7208TADULP4; 7208-TA-DUL-P4; 7208 TA DUL P4; 7208TADUL; 7208TDUEP7 |
| Arrangement Configuration | DUL - duplex universal, light preload |
| Precision Class | P4 (ABEC 7) |
| Additional Attributes | Ground in England. Angle class derived from the RHP designation scheme. |
| Cage Material | Phenolic laminated fabric |
| Number Of Rows | 1 per bearing |
| Contact Angle | 40 degrees |
| Mounting Arrangement | Universally ground: back-to-back, face-to-face or tandem |
| Design Units | Metric |
| Bearing Material | Through-hardened bearing steel |
| Part Number | 7208TADULP4 |
| Cross Reference 1 | 7208TDUEP7 (RHP B-series equivalent) |
|---|---|
| Cross Reference 2 | 7208B (ISO 40 degree shorthand) |
A super-precision angular contact ball bearing in the 7208 size, supplied as a factory-matched duplex pair. Bore 40 mm, outside diameter 80 mm, width 18 mm per bearing.
7208 — ISO angular contact series: 40 mm bore, 80 mm outside diameter, 18 mm width.
No angle letter in the RHP scheme — 40° contact angle. The B-series equivalent number carries no X suffix, which is the same 40° class; the ISO shorthand is 7208 B.
TA — phenolic laminated-fabric cage, outer-ring land riding.
DUL — duplex universal pair, light preload.
P4 — ABEC 7 precision class.
A 40° contact angle carries considerably more thrust than the 15° and 25° variants of the same envelope, and accepts a lower speed limit in exchange. Light preload gives the lowest running friction and heat generation of the three RHP preload grades, with correspondingly lower axial stiffness than medium or heavy. A phenolic cage is light and self-lubricating, which suits the cage speeds a precision spindle bearing sees, and it sets a lower temperature ceiling than a machined bronze cage.
2 Pcs — one matched duplex pair. Universal grinding allows the pair to be assembled back-to-back, face-to-face or in tandem.
The preload is ground into the ring faces, so it is realised only when both inner rings and both outer rings are clamped solidly against their seats. Alignment marks on the outer ring faces set the intended arrangement.
The RHP B-series equivalent is 7208TDUEP7. Same-envelope 7208 bearings at a 15° or 25° contact angle, or at medium or heavy preload, are related sizes rather than interchanges — the raceway geometry and the ground face offset both differ.
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