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Timing Belt Pulleys and V-Belt Sheaves: Matching Belt Drive Components Correctly
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
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2 in stock
Super precision angular contact ball bearing, matched duplex pair, 55 x 100 x 21 mm, 15° contact angle, light preload, ABEC 7, phenolic cage.
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$253.73
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| MFR / Brand | RHP |
|---|---|
| MPN | B7211X2TADULEP7 |
| Model | B 7211 X2 TADUL EP7 2MM211 211 ABEC7 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 55 mm |
| OD | 100 mm |
| Width | 21 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Lubricant | Grease or oil |
| Preload | Light (490 N axial) |
| Base Number | 7211 |
| Industry Terms | Spindle bearing, machine tool bearing, super precision angular contact, duplex pair, matched pair |
| Common Misspellings | RPH, R.H.P., B7211-X2-TA-DUL-EP-7, B7211X2TADULEP-7, B72llX2 |
| Application Types | Machine tool spindles, grinding spindles, precision gearboxes, high-speed rotating assemblies |
| Bore Shaft Size | 55 mm (2.1654 in) |
| Mpn Variants | B7211X2TADULEP7, B7211-X2-TADUL-EP7, B 7211 X2 TADUL EP7, B7211X2TDULEP7, B7211X2TADUL |
| Arrangement Configuration | Duplex pair (DU) |
| Precision Class | ABEC 7 / EP7 / P4 |
| Closure Type | Open |
| Cage Type | Outer-ring guided |
| Dynamic Load Rating | 53,000 N per bearing |
| Static Load Rating | 40,000 N per bearing |
| Precision Rating | ABEC 7 / EP7 / P4 |
| Rolling Elements | Ball |
| Item Weight | 1.206 kg (2.66 lb) pair |
| Cage Material | Laminated phenolic |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Limiting Speed | 14,200 rpm grease; 23,000 rpm oil-air (single bearing) |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 15° |
| Mounting Arrangement | Universally faced; DB, DF or DT |
| Part Number | B7211X2TADULEP7 |
| Total Width | 42 mm (pair) |
| Cross Reference 1 | Fafnir 2MM211WI-DUL – 15°, light preload pair |
|---|---|
| Cross Reference 2 | NSK 7211CTRDULP4 – 15°, phenolic, DUL, P4 |
| Cross Reference 3 | SKF 7211 CD/P4A – 15°, P4A precision |
RHP B7211-X2-TA-DUL-EP7, a super precision angular contact ball bearing supplied as a matched duplex pair. Unit Quantity: 2 Pcs, one matched duplex pair. Bore Diameter: 55 mm. Outside Diameter: 100 mm. Overall Width: 21 mm per bearing. Total Width: 42 mm for the pair. Rolling Elements: steel balls, one row per bearing. Closure Type: open.
B7211 — RHP B-series number for the ISO 7211 size, 55 x 100 x 21 mm, ISO series 72, bore code 11.
X2 — 15° contact angle in the RHP B-series.
TA — laminated phenolic cage, outer-ring guided.
DU — duplex, a matched pair with universally ground faces.
L — light preload.
EP7 — ABEC 7 precision in the RHP/NSK scheme, ISO Class 4.
Contact Angle: 15°. Dynamic Load Rating: 53,000 N per bearing. Static Load Rating: 40,000 N per bearing. Limiting Speed: 14,200 rpm grease and 23,000 rpm oil-air for a single bearing; a light-preload back-to-back pair runs at 0.80 of those figures. Preload: light, Axial Preload 490 N. Axial Stiffness: 181 N/µm for the pair. Precision Class: ABEC 7 / EP7 / P4. Cage Material: laminated phenolic. Item Weight: 2.66 lb (1.206 kg) for the pair. Lubricant: grease or oil. Bore Type: straight.
Shaft Abutment Diameter d1: 64 mm minimum. Housing Abutment Diameter D1: 91 mm maximum. Outer Ring Abutment Diameter D2: 94 mm maximum. Bearing Fillet Radius r: 1.5 mm minimum. Secondary Fillet Radius r1: 1.0 mm minimum. Effective Load Centre: 20.9 mm. Internal Volume: 27.8 cm³ per bearing. Pitch Circle Diameter Of Lubrication Jets: 72.0 mm. Mounting Arrangement: universally faced, DB, DF or DT.
Cross-references: Fafnir 2MM211WI-DUL (15°, light preload pair), NSK 7211CTRDULP4 (15°, phenolic, DUL, P4) and SKF 7211 CD/P4A (15°, P4A precision). RHP B7211-X3 is the 25° version of this size.
15°. The X2 code in the RHP B-series sets the angle, and the Fafnir 2MM211WI-DUL cross agrees.
Light preload of 490 N, giving 181 N/µm axial stiffness for the pair. The two bearings are a matched duplex pair with universally ground faces, so they stack back-to-back, face-to-face or in tandem at the same preload value.
Dynamic Load Rating 53,000 N and Static Load Rating 40,000 N per bearing. Limiting Speed for a single bearing is 14,200 rpm on grease and 23,000 rpm oil-air.
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Our team can locate, cross-reference, and source all parts.
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