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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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1 in stock
Matched duplex pair of super-precision angular contact ball bearings, 90 x 140 x 24 mm each, 25 degree contact angle, light preload. Fafnir 3MM9118WI-DUL.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9118WI-DUL |
| Model | 7018E-T-P4S-DUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 90 mm |
| OD | 140 mm |
| Width | 24 mm |
| Material | Bearing Steel |
|---|---|
| Series | 9100WI (Fafnir spindle series, ISO 7018 envelope) |
| Preload | Light |
| Base Number | 7018 |
| Industry Terms | spindle bearing, super precision bearing, precision angular contact, matched pair bearing, duplex set, ABEC 7 bearing, machine tool bearing, universally ground bearing, preloaded ball bearing |
| Common Misspellings | Faffnir, Fafner, Fafnier, 3MM9118W1, 3MM 9II8 WI, 3MM9118WIDUI, Timkin |
| Application Types | Machine tool spindles, grinding spindles, milling and turning spindles, precision rotary and indexing tables, high accuracy gearboxes |
| Bore Shaft Size | 90 mm (3.5433 in) |
| Mpn Variants | 3MM9118WI-DUL, 3MM9118WIDUL, 3MM-9118-WI-DUL, 3MM 9118 WI DUL, 3MM9118WI, 3MM9118WICRDUL, 3MM-9118-WI-CR-DUL |
| Manufacturer Status | Fafnir super precision now supplied under the Timken brand |
| Arrangement Configuration | Duplex universally ground |
| Precision Class | ABEC 7/9 (ISO P4S) |
| Dynamic Load Rating C1 | 75,200 N / 16,900 lbf (duplex set, 1 million revolutions) |
| Cage Type | CR phenolic outer land riding cage |
| Dynamic Load Rating | 75,200 N (duplex set) |
| Static Load Rating | 65,800 N |
| Precision Rating | ABEC 7/9 (ISO P4S) |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 8,300 rpm grease; 16,600 rpm oil |
| Number Of Rows | 1 per bearing (2 rows total in the pair) |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 3MM9118WI-DUL |
| Total Width | 48 mm (duplex set) |
| Closure Type | Open |
| Cross Reference 1 | Timken 7018E-T-P4S-DUL |
|---|---|
| Cross Reference 2 | RHP 7018-E-T-DUL-P4 |
| Cross Reference 3 | SKF 7018 ACD/P4ADGA – extra light vs light preload |
| Cross Reference 4 | FAG B7018-E-T-P4S-UL – single bearing, not a pair |
| Cross Reference 5 | NSK 7018A5 – single bearing, not a pair |
| Cross Reference 6 | SKF 7018 ACD/P4A – single bearing, not a pair |
| Cross Reference 7 | Fafnir 2MM9118WI-DUL – 15° vs 25° |
Fafnir 3MM9118WI-DUL is a matched duplex pair of super-precision single-row angular contact ball bearings from Timken, each 90 mm bore x 140 mm outside diameter x 24 mm wide, 25° contact angle, light preload, duplex universally ground. Unit Quantity: 2 Pcs, one matched duplex pair. Total Width: 48 mm. Timken World Part Number: 7018E-T-P4S-DUL.
3MM — Fafnir super-precision metric series, 25° contact angle, ground to ISO P4S.
9118 — 9100WI dimension series, ISO 7018 envelope, 90 x 140 x 24 mm.
WI — low shoulder on both rings.
DUL — duplex universally ground, light preload.
7018E — Timken world part number prefix; E denotes 25°.
Bore Diameter: 90 mm. Outside Diameter: 140 mm. Width: 24 mm per bearing. Total Width: 48 mm. Contact Angle: 25°. Preload: Light. Precision Class: ABEC 7/9 (ISO P4S). Cage Material: Phenolic. Cage Type: CR phenolic outer land riding cage. Rolling Elements: Ball (steel). Number Of Rows: 1 per bearing. Closure Type: Open. Bore Type: Straight. Series: 9100WI. Dynamic Radial Load Rating (C1), duplex set: 75,200 N (16,900 lbf). Dynamic Radial Load Rating per row, C1 ISO: 68,500 N (15,400 lbf). Static Radial Load Rating (C0): 65,800 N (14,800 lbf). Limiting Speed: 8,300 rpm grease; 16,600 rpm oil.
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). Universally ground faces: the pair can be arranged back-to-back, face-to-face or in tandem.
Cross-references: Timken 7018E-T-P4S-DUL; RHP 7018-E-T-DUL-P4 (25° light-preload duplex pair); SKF 7018 ACD/P4ADGA (extra light vs light preload); FAG B7018-E-T-P4S-UL, NSK 7018A5 and SKF 7018 ACD/P4A (25° single bearings); Fafnir 2MM9118WI-DUL (15° vs 25°).
Bore Diameter: 90 mm. Outside Diameter: 140 mm. Width: 24 mm per bearing; Total Width: 48 mm for the pair.
Contact Angle: 25° (3MM). Preload: Light (L in DUL).
Dynamic Radial Load Rating (C1), duplex set: 75,200 N; per row (C1 ISO): 68,500 N. Static Radial Load Rating (C0): 65,800 N. Limiting Speed: 8,300 rpm grease; 16,600 rpm oil.
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