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RHPSuper Precision Angular Contact Ball Bearing Matched Set 25x47x12 mm, 15 Degree Contact Angle, Duplex Light Preload, Phenolic Cage, 2 Pieces

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Availability:

25 in stock

RHP 7005CTDULP3 matched super precision angular contact bearing pair, 25x47x12 mm, 15° contact angle, light preload, phenolic cage, P3 grade, 2 Pcs.

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$125.43

25 in stock

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Specifications

Key Specifications

MFR / BrandRHP
Model7005-C-T-DUL-P3
Bearing TypeAngular Contact Ball Bearing, Open
ID25 mm
OD47 mm
Width12 mm

Technical Specifications

MaterialCarbon chrome bearing steel, BS970 534A99/535A99 or SAE 52100
SeriesISO series 10 (70xx)
LubricantGrease or oil
PreloadLight (L), 59 N axial
Base Number7005
Industry Termsspindle bearing; machine tool bearing; matched pair; DUL duplex; phenolic cage; precision angular contact
Application TypesGrinding spindles; compact machine tool spindles; ball screw support; precision rotary axes
Total Width24 mm as a matched pair
Bore Shaft Size25 mm
Mpn Variants7005CTDULP3; 7005 C T DUL P3; 7005-C-T-DUL-P3; 7005CTDUL; 7005C; 7005CTDULP4
Manufacturer StatusRHP super precision production transferred to NSK
Arrangement ConfigurationDUL — duplex universal matched pair, light preload
Precision ClassP3 (dimensional accuracy ISO Class 4, running accuracy ISO Class 2)
Closure TypeOpen
Cage TypeMachined, outer-ring guided
Dynamic Load Rating11.7 kN (11,700 N)
Static Load Rating7.4 kN (7,400 N)
Precision RatingP3 (dimensional accuracy ISO Class 4, running accuracy ISO Class 2)
Rolling ElementsBall
Max Temp120 °C
Item Weight0.079 kg (0.174 lb) per bearing
Cage MaterialLaminated phenolic resin
Limiting Speed47,500 rpm oil/air; 29,300 rpm grease
Number Of Rows1 per bearing
Bore TypeStraight
Snap Ring IncludedNo
Harmonization Code8482.10.5028
Contact Angle15°
Design UnitsMetric
Bearing MaterialCarbon chrome bearing steel (SAE 52100 / BS970 534A99)
Running AccuracyKia 2.5 µm; Kea 2.5 µm
Part Number7005CTDULP3
Running Accuracy Radial And Axial RunoutKia 2.5 µm; Kea 2.5 µm

Cross-References

Cross Reference 1NSK 7005CTRDULP3
Cross Reference 2Timken/Fafnir 2MM9105WI
Seller Part Number: B-BI2#01KNV7

Product Description

What this part is

An RHP super-precision angular contact ball bearing in the 7005 size, supplied as a universally ground matched duplex pair for light-preload mounting. Bore: 25 mm. Outside Diameter: 47 mm. Width: 12 mm per bearing. Bearing type: Angular contact ball bearing, super precision, single row. Closure: Open. Bore type: Straight. Rolling elements: Ball. Bearing material: Carbon chrome bearing steel, BS970 534A99/535A99 or SAE 52100. Series: ISO series 10 (70xx).

Decoding the designation

7005 — ISO series 10, bore code 05, giving 25 x 47 x 12 mm.

C — 15° contact angle.

T — laminated phenolic resin cage, outer-ring guided, rated to 120 °C.

DU — duplex universal matched pair, universally face-controlled so the pair mounts back-to-back, face-to-face or in tandem at the specified preload with no measured spacers.

L — light preload.

P3 — intermediate grade: ISO Class 4 dimensional accuracy with ISO Class 2 running accuracy.

Load ratings and speed

Dynamic Load Rating: 11.7 kN (11,700 N). Static Load Rating: 7.4 kN (7,400 N). Limiting Speed: 47,500 rev/min oil/air; 29,300 rev/min grease. Axial Preload, light: 59 N. Axial Stiffness, light preload: 32 N per micrometre. Running Accuracy: Kia 2.5 µm, Kea 2.5 µm. Maximum recommended operating temperature: 120 °C. Lubricant: Grease or oil.

What these specs mean in practice

15° is the speed end of the super precision range: the highest limiting speed and the least heat generation of the common angles, trading thrust capacity and axial stiffness for it. That is the right balance on a grinding spindle where surface finish depends on the bearing staying cool and true. Light preload compounds it with lower friction, lower thermal growth and longer grease life. Tabulated limiting speeds apply to a single bearing under spring preload with the inner ring rotating; a back-to-back light-preload pair takes a 0.80 factor and a face-to-face pair a further 50% reduction. The bearing is preload-set at manufacture.

Quantity and configuration

Unit Quantity: 2 Pcs, one matched universal pair. Number of Rows: 1 per bearing. Total Width as a pair: 24 mm.

Thrust direction

Each bearing is single-row angular contact and takes thrust in one direction. Back-to-back or face-to-face, the pair locates the shaft in both directions; in tandem both rows share thrust in the same single direction.

Mounting data

Abutment diameters: d1 min 30 mm, D1 max 42 mm, D2 max 44.5 mm. Chamfer: r min 0.6 mm, r1 min 0.3 mm. Effective load centre a: 10.8 mm. Internal free volume: 3.8 cm³. PCD of lubrication jets: 32.9 mm. Mass: 0.079 kg per bearing.

Interchange guidance

Same 15° angle and light preload in the same envelope: NSK 7005CTRDULP3, Timken/Fafnir 2MM9105WI. Manufacturer status: RHP super precision production passed to NSK. Harmonization Code: 8482.10.5028.

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