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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
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Fafnir super precision angular contact ball bearing, 45 x 85 x 19 mm, universally ground duplex pair, 25° contact angle, heavy preload, phenolic cage, P4S.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM209WI DUH |
| Model | 3 MM 209 WI DUH / 7209E T DUH P4 7209A 7209ACD 7209A5 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 45 mm |
| OD | 85 mm |
| Width | 19 mm |
| Material | Bearing Steel |
|---|---|
| Series | 200WI / 3MM super precision metric |
| Base Number | 3MM209WI |
| Industry Terms | super precision bearing; spindle bearing; duplex pair |
| Common Misspellings | Fafner, Fafnier, Fanfir, 3MM209W1, 3MM209WL, 3MM209 WI DUH |
| Application Types | Machine tool spindles; CNC spindles; grinding spindles |
| Bore Shaft Size | 45 mm |
| Mpn Variants | 3MM209WI-DUH, 3MM209WIDUH, 3MM209WICRDUH, 3MM209WI CR DUH |
| Manufacturer Status | Fafnir bearings are now branded and supplied by Timken |
| Compatible With Replaces | Fafnir 3MM209WI-DUH; Timken 7209E-T-P4S-DUH |
| Rolling Elements | Ball |
| Number Of Rows | 2 (one row per bearing, supplied as a pair) |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 3MM209WI-DUH |
| Cross Reference 1 | Timken 7209E-T-P4S-DUH |
|---|---|
| Cross Reference 2 | FAG B7209-E-T-P4S-DUH |
| Cross Reference 3 | SKF 7209 ACD/P4A - SKF P4A precision, preload by suffix |
| Cross Reference 4 | NSK 7209A5 DUH P4 - ISO P4, not P4S |
Fafnir (Timken) super precision angular contact ball bearing for machine tool spindle positions, supplied as a universally ground duplex pair. Brand: Fafnir (Timken). Manufacturer: Timken. Part Number: 3MM209WI-DUH. Base Number: 3MM209WI. Series: 200WI / 3MM super precision metric. Condition: New. Unit Quantity: 1 matched duplex pair, 2 bearings.
3MM — Fafnir/Timken super precision metric series, 25° contact angle; the MM prefix carries ISO P4S.
209 — 200WI dimension series, 45 mm bore.
WI — Fafnir super precision spindle angular contact series.
CR — phenolic outer-land-riding cage, Timken cage designation MBR; carried on the carton and in Timken’s manufacturing part number.
DU — duplex universally ground rings.
H — heavy preload.
Bore Diameter: 45 mm. Outside Diameter: 85 mm. Width: 19 mm per bearing. Total Width: 38 mm as a duplex pair. Bore Type: straight. Design Units: Metric. Precision Class: ISO P4S, ABEC 7/9. Preload: heavy (H). Contact Angle: 25°. Cage Type: machined phenolic, outer-land-riding (CR / Timken MBR). Cage Material: phenolic. Rolling Elements: steel balls. Number Of Rows: 2, one row per bearing. Closure Type / Seal Type: open. Arrangement / Configuration: duplex universally ground matched pair (DU), mountable back-to-back, face-to-face or tandem. Dynamic Load Rating C1, 1 million revolutions, duplex set: 9,700 lbf / 43,100 N. C1 ISO dynamic radial rating per row: 8,820 lbf / 39,200 N. Static Load Rating C0: 6,200 lbf / 27,600 N. Limiting Speed, grease: 17,200 rpm. Limiting Speed, oil: 31,600 rpm. Min Temp: -40 °C. Max Temp: 120 °C. Harmonization Code: 8482.10.50.
Bore d: 45 mm. Outside Diameter D: 85 mm. Width B: 19 mm per bearing. Maximum shaft fillet radius: 1 mm. Shaft backing shoulder diameter: 52.3 mm. Housing backing shoulder diameter: 78.2 mm. Outer ring to-clear radius: 1 mm.
Cross-Reference: 7209E-T-P4S-DUH, Timken’s published world part number, where E denotes the 25° contact angle and T the phenolic cage; 7209E-T-P4S; 7209E; 7209 ISO base number for the 45 x 85 x 19 mm envelope; 3MM209WI CR DUH carton form; Fafnir 3MM209WI-DUH legacy brand designation; SKF 7209 ACD/P4A; NSK 7209A5 DUH P4; FAG B7209-E-T-P4S-DUH. 7209-A / 7209A is retained as a search term. Manufacturer Status: Fafnir super precision bearings are branded and supplied by Timken. Applications: machine tool spindles, CNC milling and turning spindles, grinding spindles, jig borers, precision gearboxes, high-speed rotary tables and screw-driven precision axes.
A super precision angular contact ball bearing, 45 x 85 x 19 mm, supplied as a universally ground duplex pair with 25° contact angle and heavy preload.
DU denotes duplex universally ground rings; H denotes heavy preload.
7209E-T-P4S-DUH, where E denotes the 25° contact angle and T the phenolic cage.
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