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NSK7218A5TRDULP4YAngular Contact Ball Bearing 90x160x30 mm Super Precision 25 Degree ABEC 7 Phenolic Cage Light Preload Universal Duplex Pair – NSK 7218A5TRDULP4Y

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1 in stock

Super precision angular contact ball bearing, 90x160x30 mm, 25 degree contact angle, outer-ring guided phenolic cage, light-preload duplex pair.

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$744.14

1 in stock

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Specifications

Key Specifications

MFR / BrandNSK
MPN7218A5TRDULP4Y
Model7218A5TR/DULP4Y 7218A ABEC7
Bearing TypeAngular Contact Ball Bearing, Open
ID90 mm
OD160 mm
Width30 mm

Technical Specifications

MaterialSteel
Series7200 Series Super Precision
PreloadLight (L)
Base Number7218
Industry TermsSuper precision angular contact ball bearing; spindle bearing; phenolic cage bearing; matched duplex pair; machine tool bearing
Common Misspellings7218ASTRDULP4Y; 7218A5TRDULP4-Y; 7218A5TRDU LP4Y; 7218 A5TRDULP4Y; 7218A5TRDULPAY
Application TypesMachine tool spindles; grinding spindles; precision gearboxes; high-speed rotary tables; milling and turning centres
Overall Width30 mm
Mpn Variants7218A5TRDULP4Y; 7218A5 TR DUL P4Y; 7218-A5-TR-DUL-P4Y; 7218A5TR DUL P4Y; 7218 A5 TR DUL P4Y
Precision ClassABEC 7 / P4
Additional AttributesEffective load centre a 44.1 mm; permissible axial load Pa 83.5 kN; da min 100 mm; Da max 150 mm; Db max 154 mm; ra max 2 mm; rb max 1 mm; r min 2 mm; r1 min 1 mm
Closure TypeOpen
Cage TypeOuter-ring guided
Dynamic Load Rating147,000 N
Static Load Rating100,000 N
Rolling ElementsBall
Item Weight2.31 kg (5.093 lb) per bearing
Cage MaterialPhenolic
Number Of RowsSingle Row
Bore TypeStraight
Snap Ring IncludedWithout Snap Ring
Limiting Speed8,000 rpm grease; 12,000 rpm oil
LubricantGrease or oil-air; 12 g grease per bearing recommended
Harmonization Code8482.10.5028
Contact Angle25°
Mounting ArrangementUniversal duplex (DU), pairable DB, DF or DT
Bearing MaterialBearing Steel

Cross-References

Cross Reference 1SKF 7218 ACD/P4A
Cross Reference 2FAG B7218-E-T-P4S
Cross Reference 3Fafnir / Timken 3MM9218WI
Cross Reference 4NSK 7218A5TYNDULP4 (sibling, polyamide cage)
Cross Reference 5NSK 7218A5TRSULP4Y (sibling, supplied as a single universal unit)
Cross Reference 6NSK 7218A5TRDUMP4Y (sibling, medium preload)
Cross Reference 7NTN 7218UCDBP4 (comparable 25 degree super precision, not a code-for-code match)
Seller Part Number: B-BH5#QSDEDN

Product Description

What this part is

NSK 7218A5TRDULP4Y is a super precision single-row angular contact ball bearing in the 7200 series, 90 mm bore by 160 mm outside diameter by 30 mm width, supplied as a universally ground pair. Bore Diameter: 90 mm. Outside Diameter: 160 mm. Overall Width: 30 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: Single Row. Bearing Material: Bearing Steel. Series: 7200 Series Super Precision. Base Number: 7218.

Decoding the designation

7218 — 72 dimension series, 90 mm bore.

A5 — 25° contact angle in NSK super precision nomenclature.

TR — phenolic resin cage, outer-ring guided.

DU — universally ground duplex set, flush-ground so the two rings pair back-to-back, face-to-face or in tandem.

L — light preload class.

P4Y — NSK accuracy grade in the P4 family, commonly quoted as ABEC 7.

What these specs mean in practice

Dynamic Load Rating: 147,000 N per bearing. Static Load Rating: 100,000 N per bearing. Limiting Speed: 8,000 rpm grease; 12,000 rpm oil. Permissible axial load Pa: 83.5 kN. Item Weight: 2.31 kg (5.093 lb) per bearing. Cage Material: Phenolic. Cage Type: Outer-ring guided. Preload: Light (L). Lubricant: grease or oil-air, 12 g grease per bearing recommended. Load ratings and mass are stated per bearing, not per set.

Mounting data

Effective load centre a: 44.1 mm. Shaft abutment diameter da min: 100 mm. Housing abutment diameter Da max: 150 mm. Housing abutment diameter Db max: 154 mm. Shaft fillet radius ra max: 2 mm. Housing fillet radius rb max: 1 mm. Chamfer r min: 2 mm. Chamfer r1 min: 1 mm.

Quantity and configuration

Unit Quantity: 2 Pcs. Mounting Arrangement: universal duplex (DU), pairable DB, DF or DT. A preloaded set carries a defined preload rather than a running internal clearance.

Interchange guidance

Equivalents at 25° include SKF 7218 ACD/P4A, FAG B7218-E-T-P4S and Fafnir · Timken 3MM9218WI. NSK siblings in the same envelope include 7218A5TYNDULP4 and 7218A5TRSULP4Y, which differ in cage or in arrangement. NTN 7218UCDBP4 is a comparable 25° super precision bearing rather than a code-for-code match.

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