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NSKSuper Precision Angular Contact Ball Bearing — 90 mm ID, 125 mm OD, 18 mm Width, 25° Contact Angle, Ball-Guided Cage, Light Preload, Open.

Condition: New

Availability:

1 in stock

Super precision angular contact ball bearing, 90x125x18 mm, 25° contact angle, ball-guided cage, light preload. Dynamic load rating 49,500 N.

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$306.77

1 in stock

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Specifications

Key Specifications

MFR / BrandNSK
Model7918A5TYDULPA7
Bearing TypeAngular Contact Ball Bearing, Open
ID90 mm
OD125 mm
Width18 mm

Technical Specifications

MaterialBearing Steel
Series7900
LubricantGrease or oil
PreloadLight
Base Number7918A5
Industry TermsSuper precision angular contact bearing; machine tool spindle bearing; precision spindle bearing
Common Misspellings7918A5TYSUPLA7; 7918A5 TY SUL PA-7; 7918A5TSULPA7; NSK 7918 A5TY
Application TypesMachine tool spindles; grinding spindles; high-speed rotating equipment; precision gearboxes
Overall Width18 mm
Mpn Variants7918A5TYSULPA7; 7918A5TYDULPA7; 7918-A5-TY-SUL-PA7; 7918 A5 TY SUL PA7; 71918
Additional AttributesEffective load centre a 34.1 mm; permissible axial load 33,500 N; recommended grease quantity 3.4 g per bearing; shaft abutment da min 97 mm; housing abutment Da max 118 mm, Db max 120 mm; chamfer r min 1.1 mm, r1 min 0.6 mm; max shaft fillet ra 1 mm, max housing fillet rb 0.6 mm
Cage TypeBall-guided
Dynamic Load Rating49,500 N
Static Load Rating43,500 N
Rolling ElementsBall
Number Of Rows1
Bore TypeStraight
Snap Ring IncludedNo
Limiting Speed9,400 rpm grease; 14,000 rpm oil
Harmonization Code8482.10.50
Contact Angle25°
Bearing MaterialBearing steel

Cross-References

Cross Reference 1SKF 71918 ACD/P4A
Cross Reference 2FAG B71918-E-T-P4S
Cross Reference 3Timken Fafnir 3MM9318WI
Cross Reference 4NTN 7918UAD
Seller Part Number: B-AH5B3#QTIJAJ

Product Description

What this part is

NSK 7918A5 super precision angular contact ball bearing on the ISO 71918 envelope. Bore Diameter: 90 mm. Outside Diameter: 125 mm. Overall Width: 18 mm. Contact Angle: 25°. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Bearing Material: Bearing steel.

Decoding the designation

7918 — NSK’s number for the 90 x 125 x 18 mm super precision angular contact size. The ISO number is 71918.

A5 — 25° contact angle.

TY — ball-guided cage.

L — light preload.

What these specs mean in practice

Dynamic Load Rating: 49,500 N (11,128 lbf). Static Load Rating: 43,500 N (9,780 lbf). Both ratings are per bearing.

Limiting Speed: 9,400 rpm grease; 14,000 rpm oil-air. Lubricant: grease or oil.

Permissible axial load: 33,500 N. A 25° contact angle carries more axial load than a 15° execution on the same envelope, at a lower speed ceiling.

Cage Type: Ball-guided. Preload: Light. Item Weight: 0.560 kg (1.23 lb) per bearing.

Mounting data

Effective load centre a: 34.1 mm. Shaft abutment diameter da min: 97 mm. Housing abutment diameter Da max: 118 mm. Housing abutment diameter Db max: 120 mm.

Bearing chamfer r min: 1.1 mm and r1 min: 0.6 mm. Maximum shaft fillet radius ra: 1 mm. Maximum housing fillet radius rb: 0.6 mm. Recommended grease quantity: 3.4 g per bearing.

Interchange guidance

25° contact angle, super precision class: SKF 71918 ACD/P4A, FAG B71918-E-T-P4S, Timken Fafnir 3MM9318WI, NTN 7918UAD.

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