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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Super-precision angular contact ball bearing, 90 x 140 x 24 mm, 15-degree contact angle, ABEC 7/9. Phenolic outer land riding cage, steel ball complement.
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Super Precision Angular Contact Ball Bearing — 90 mm ID, 140 mm OD, 24 mm Width, 15° Contact Angle, Extra Light Preload, P4A$318.15
Super Precision Angular Contact Ball Bearing 90x140x24 mm 15° ABEC 7 Light Preload$168.28
Super Precision Angular Contact Ball Bearing 90x140x24 mm, 15° Contact Angle, Phenolic Cage, ABEC 7, Light Preload, Universally Ground, Single Bearing (Half Pair)$276.00
Angular Contact Ball Bearing - 90 mm ID, 140 mm OD, 24 mm Width, 15° Contact Angle, Light Preload, P4S$298.33| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9118WI |
| Model | 7018 2MM-9118WI |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 90 mm |
| OD | 140 mm |
| Width | 24 mm |
| Material | High Carbon Chrome Steel |
|---|---|
| Series | 9100 |
| Preload | Light |
| Base Number | 9118 |
| Bore Shaft Size | 90 mm |
| Mpn Variants | 2-MM-9118-WI, 2MM 9118 WI, 2MM9118WICR, 7018C |
| Manufacturer Status | Active |
| Precision Class | ABEC 7/9 (ISO P4S) |
| Dynamic Load Rating C1 | 79600 N (17900 lbf) |
| Additional Attributes | Shaft backing shoulder diameter 99.7 mm (3.930 in); housing backing shoulder diameter 130.9 mm (5.160 in); maximum shaft fillet radius 1.5 mm (0.059 in); outer ring to-clear radius 1.5 mm (0.059 in); ISO method dynamic rating per row 72200 N (16200 lbf) |
| Cage Type | CR – Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 79600 N (17900 lbf) |
| Static Load Rating | 68900 N (15500 lbf) |
| Precision Rating | ABEC 7/9 (ISO P4S) |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 9200 |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Design Units | Metric |
| Part Number | 2MM9118WI |
| Cross Reference 1 | 7018C-T-P4S |
|---|
Fafnir 2MM9118WI, a super-precision spindle angular contact ball bearing from Timken’s Fafnir 9100WI range. Bore: 90 mm. Outside Diameter: 140 mm. Overall Width: 24 mm. Contact Angle: 15°. Precision Class: ABEC 7/9 (ISO P4S). Cage Type: CR, phenolic outer land riding. Cage Material: phenolic. Rolling Elements: steel balls. Number of Rows: 1. Design Units: Metric. Manufacturer Part Number: 2MM9118WI.
2MM — Fafnir super-precision spindle execution at a 15° contact angle, ground to ABEC 7/9 (ISO P4S) tolerance.
9118 — 9100WI dimension series, bore code 18. That is the ISO 7018 envelope: 90 mm bore, 140 mm outside diameter, 24 mm width.
WI — low shoulder on both rings, which is what allows the ball complement and the 15° angle to be ground into this section.
Dynamic Radial Load Rating (C1): 79,600 N (17,900 lbf). Dynamic Radial Load Rating, ISO method (C1 per row): 72,200 N (16,200 lbf). Static Radial Load Rating (C0): 68,900 N (15,500 lbf). Limiting Speed, grease: 9,200 rpm. Limiting Speed, oil: 18,400 rpm.
A 15° contact angle keeps the load path close to radial, which is what lets a 90 mm bore turn at 9,200 rpm on grease and 18,400 rpm under oil. The 25° build on the same envelope trades that speed for thrust capacity. The phenolic outer land riding cage is light, so it adds little to the ball-set inertia at speed, and the resin holds oil in its own porosity to feed the ball pockets. ABEC 7/9 grinding is what holds the running accuracy a machine tool spindle needs.
Unit Quantity: 1 Pc. One single-row bearing, sealed in the factory bag.
Shaft Backing Shoulder Diameter: 99.7 mm (3.930 in). Housing Backing Shoulder Diameter: 130.9 mm (5.160 in). Maximum Shaft Fillet Radius: 1.5 mm (0.059 in). Outer Ring To-Clear Radius: 1.5 mm (0.059 in).
Timken’s world part number for this bearing is 7018C-T-P4S. Searchable variants of the Fafnir number: 2MM9118WI, 2-MM-9118-WI, 2MM 9118 WI, 2MM9118WICR, 7018C.
The 3MM9118WI on the same 90 x 140 x 24 mm envelope is the 25° build: more thrust capacity, lower speed.
$227.83
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$152.21
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Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Tapered, cylindrical, and spherical roller bearings all solve the same basic problem, carrying more load
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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