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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
Super-precision angular contact ball bearing duplex pair, 100 x 180 x 34 mm each, 25° contact angle, light preload, open, ABEC 7 / P4, 2 Pcs.
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$989.29
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM220WI-DUL |
| GTIN | 087796071209 |
| Model | 3MM220WICRDUL / 3MM-220-WI-DUL |
| Bearing Type | Ball Bearing, Open |
| ID | 100 mm |
| OD | 180 mm |
| Width | 34 mm |
| Material | Steel |
|---|---|
| Series | 200 |
| Preload | Light |
| Base Number | 3MM220WI |
| Industry Terms | spindle bearing, super precision angular contact, precision duplex pair, matched set bearing, ABEC 7 bearing, machine tool bearing, light preload spindle bearing |
| Common Misspellings | Fafner, Faffnir, Fafnier, 3MM202WI, 3MM220WL, 3MM220W1 |
| Application Types | Machine tool spindles, grinding spindles, precision boring heads, rotary tables, high-accuracy gearboxes |
| Bore Shaft Size | 100 mm (3.937 in) |
| Mpn Variants | 3MM220WI-DUL, 3MM220WI DUL, 3MM220WIDUL, 3MM-220-WI-DUL, 3MM 220 WI DUL, 3MM220WICRDUL, 3MM220WICRDUL, 3MM220WI, 220WI, MM220WI |
| Manufacturer Status | Fafnir super precision line now supplied under the Timken brand |
| Precision Class | ABEC 7 / P4 |
| Dynamic Load Rating | 157,500 N per bearing |
| Static Load Rating | 121,000 N per bearing |
| Rolling Elements | Balls |
| Number Of Rows | 1 per bearing, 2 rows as a mounted pair |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 3MM220WI-DUL |
| Limiting Speed | 7,900 rpm grease; 14,400 rpm oil |
| Dynamic Load Rating C1 | 157,500 N per bearing |
| Cross Reference 1 | SKF 7220 ACD/P4A - 25 deg, single bearing, no preload code |
|---|---|
| Cross Reference 2 | NSK 7220A5 - 25 deg, single bearing, no preload code |
| Cross Reference 3 | FAG B7220-E-T-P4S - 25 deg, single bearing, no preload code |
| Cross Reference 4 | Timken 3MM220WICRDUL - Timken catalog listing of this bearing |
Fafnir 3MM220WI-DUL super-precision angular contact ball bearings, 2 Pcs, supplied as a universally ground duplex pair with light preload. Bore 100 mm, outside diameter 180 mm, width 34 mm per bearing, ISO 7220 envelope. Single row each, open. Timken catalog listing: 3MM220WICRDUL.
3MM — Fafnir 3MM spindle angular contact series, 25° contact angle, ABEC 7 / P4 class.
220 — ISO 7220 envelope, 100 x 180 x 34 mm.
WI — low shoulder on both rings, the duplex form.
DUL — duplex, universally ground, light preload.
Bore Diameter: 100 mm (3.937 in). Outside Diameter: 180 mm (7.087 in). Overall Width: 34 mm (1.339 in) per bearing. Contact Angle: 25°. Preload: Light. Precision Class: ABEC 7 / P4. Closure Type: Open. Rolling Elements: Steel balls. Number Of Rows: 1 per bearing. Dynamic Radial Load Rating (C1), per bearing: 157,500 N (35,400 lbf). Static Radial Load Rating (C0), per bearing: 121,000 N (27,200 lbf). Limiting Speed: 7,900 rpm grease; 14,400 rpm oil. GTIN: 0087796071209. Unit Quantity: 2 Pcs.
Shaft Backing Shoulder Diameter: 114.4 mm (4.510 in). Housing Backing Shoulder Diameter: 166 mm (6.540 in). Maximum Shaft Fillet Radius: 2.1 mm (0.079 in). Arrangement: duplex pair, universally ground. Harmonization Code: 8482.10.50.
Cross-references at 25°: SKF 7220 ACD/P4A, NSK 7220A5 and FAG B7220-E-T-P4S, each a single bearing without a preload code. Related: Fafnir 2MM220WI, the 15° version. MPN variants: 3MM220WI-DUL, 3MM220WI DUL, 3MM220WIDUL, 3MM-220-WI-DUL, 3MM220WICRDUL.
25°, from the 3MM series and confirmed on the Timken catalog page.
100 mm bore, 180 mm outside diameter, 34 mm width. C1 157,500 N and C0 121,000 N. Limiting speed 7,900 rpm grease, 14,400 rpm oil.
DUL is a duplex pair, universally ground, with light preload.
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Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
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If you pulled a bearing off general industrial equipment at random, there’s a good chance
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