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RHP/NSK 7213CTDULP4 matched pair super precision angular contact ball bearings, 65x120x23 mm, 15° contact angle, ABEC 7, light preload, phenolic cage.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7213CTDULP4 |
| Model | 7213 C T DUL P4 / 2MM213WI CR DUL / B7213X2-TA-DUL-EP7 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 65 mm |
| OD | 120 mm |
| Width | 23 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Condition | New |
| Lubricant | Oil |
| Preload | Light |
| Base Number | 7213C |
| Common Misspellings | 7213 CTDULP4, 7213CTDUL P4, 7213CDULP4, 7213CTDLUP4, RHP 7213 C T DUL P4, RHP bearing 7213 |
| Application Types | Machine tool spindles, grinding spindles, milling and turning centres, high-speed rotary and indexing tables, precision gearboxes, test rigs |
| Bore Shaft Size | 65 mm |
| Mpn Variants | 7213CTDULP4, 7213C-T-DUL-P4, 7213-C-T-DUL-P4, 7213 C T DUL P4, 7213CTDUL, 7213CDULP4, 7213C, 7213 |
| Manufacturer Status | RHP brand discontinued; line continued by NSK |
| Compatible With Replaces | Replaces RHP/NSK 7213C super precision spindle bearing sets of matching 15° contact angle, P4 class and light preload. |
| Rolling Elements | Ball |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.28 |
| Part Number | 7213CTDULP4 |
| Cross Reference 6 | NTN 7213CGD2GLP4 (GD2GL = universally ground duplex light preload) |
|---|---|
| Cross Reference 7 | ISO base number 7213C |
RHP (NSK) 7213CTDULP4 is a super precision angular contact ball bearing from the ISO series 02 (72xx) medium section, supplied as a universally ground duplex matched pair. Brand: RHP (now NSK). Part Number: 7213CTDULP4. Base Number: 7213C. Series: 72. Unit Quantity: 2 bearings, one matched duplex pair. Number Of Rows: 1 per bearing. Rolling Elements: Balls. Bore Type: Straight. Closure Type: Open. Seal Type: Open. Design Units: Metric. Harmonization Code: 8482.10.50.28.
Bore: 65 mm. Outside Diameter: 120 mm. Overall Width: 23 mm per bearing. Chamfer r min: 1.5 mm. Chamfer r1 min: 1.0 mm. Weight: 1.007 kg (2.22 lb) per bearing, 2.014 kg (4.44 lb) per matched pair.
Basic Dynamic Load Rating Cr: 73.0 kN (73,000 N) per bearing. Basic Static Load Rating Cor: 58.5 kN (58,500 N) per bearing. Source: RHP Super Precision Angular Contact Ball Bearings catalogue, ref C859/B/E/I/03.02, Table 10, ISO series 02, row 7213CTRSU.
Limiting Speed, oil/air lubrication: 18,700 rpm. Limiting Speed, grease lubrication: 11,500 rpm. Both are catalogue single-bearing figures under spring preload. Applying the catalogue back-to-back pair factor of 0.80 for light preload gives 14,960 rpm oil/air and 9,200 rpm grease for this DB pair.
Contact Angle: 15°. Preload: Light (L). Axial Preload, light grade, paired: 440 N. Axial Stiffness, light grade, paired: 95 N per micrometre. Effective Load Centre a: 23.9 mm. Lubricant: Oil.
Cage Type: Machined one-piece, outer-ring guided. Cage Material: Laminated phenolic resin. Max Temp: 120°C. Min Temp: –30°C. Precision Class: P4 (ISO class 4, equivalent to ABEC 7). Ring and ball material: through-hardened carbon chrome bearing steel to BS970:534A99 / 535A99, equivalent to SAE 52100.
Mounting Arrangement: Duplex, universally ground (DU) — back-to-back (DB), face-to-face (DF) or tandem (DT) at the ground light preload with no shimming. A back-to-back pair carries combined radial and axial load and resists moment load about the shaft axis. Abutment diameter d1 min: 74 mm. Abutment diameter D1 max: 111 mm. Abutment diameter D2 max: 114 mm. Internal Volume: 41.1 cm3 per bearing. Pitch circle diameter of lubrication jets: 86.2 mm. The high point of radial runout is marked by a burnished spot on the inner ring face and a V line on the outer ring diameter, and the V line indicates the direction of the contact angle.
Designation breakdown per the RHP system: 7 single-row angular contact ball bearing; 2 dimension series 02; 13 bore code, 65 mm bore; C 15° contact angle; T outer-ring-guided phenolic cage; DU duplex universal; L light preload; P4 ISO class 4, ABEC 7. Same-envelope interchange at 15° and P4: NSK 7213CTRDULP4, NSK 7213CTYNDULP4, Timken/Fafnir 2MM213WI CR DUL, SKF 7213CD/P4ADGA, FAG B7213C.T.P4S.UL, NTN 7213CGD2GLP4. Application Types: machine tool spindles, grinding spindles, milling and turning centres, high-speed rotary and indexing tables, precision gearboxes and test rigs.
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