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.
Availability:
Out of stock
Super precision angular contact ball bearing set, 45 x 85 x 19 mm, 25° contact angle, medium preload universal duplex, open, phenolic cage, ABEC 7/9.
List Price
$225.21
Out of stock
Out of stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
This item is currently out of stock
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.
Angular Contact Ball Bearing 45x85x19 mm Super Precision 25 Degree ABEC 7 Medium Preload Universal Duplex Pair - NSK 7209A5YTDUMP4$191.22
Angular Contact Ball Bearing — Super-Precision P4A Matched Pair, 45 mm ID, 85 mm OD, 19 mm Width, 25° Contact Angle, Light Preload 520 N$258.43
Angular Contact Ball Bearing – 45 mm Bore, 85 mm OD, 19 mm Width, 25° Contact Angle, Medium Preload, Universally Ground$198.05
Super-Precision Angular Contact Ball Bearing Matched Set - 45 mm ID, 85 mm OD, 19 mm Width, Open, 25°, P4A, Moderate Preload$227.83| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM209WIDUM |
| GTIN | 7423718622655 |
| Model | 3MM-209-WI-DUM 7209 |
| Bearing Type | Super-Precision Angular Contact Ball Bearing, Open, both faces |
| ID | 45 mm |
| OD | 85 mm |
| Width | 19 mm |
| Material | High Carbon Chrome Steel |
|---|---|
| Series | 200 Series |
| Lubricant | Oil/Grease |
| Preload | Medium |
| Total Width | 38 mm as a mounted duplex pair |
| Base Number | 7209 |
| Industry Terms | Spindle bearing; super precision bearing; machine tool bearing; duplex pair; matched set |
| Common Misspellings | 3MM209W1-DUM; 3MM209WIDUN; 3MM 209WI-DUM |
| Bore Shaft Size | 45 mm (1.7717 in) |
| Mpn Variants | 3MM209WI-DUM; 3MM209WIDUM; 3MM-209-WI-DUM; 3MM 209WI DUM; 3MM209WI |
| Manufacturer Status | Fafnir super-precision line, now Timken |
| Closure Type | Open |
| Rolling Elements | Steel balls |
| Number Of Rows | 1 per bearing (2 rows in the mounted set) |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.5028 |
| Cross Reference 6 | 3MM209WI-DUL (related, same set at light preload) |
|---|
Fafnir 3MM209WI-DUM super-precision angular contact ball bearing, supplied as a universally ground duplex set of two. Bore: 45 mm (1.7717 in). Outside Diameter: 85 mm (3.3465 in). Overall Width: 19 mm (0.7480 in) per bearing. Total Width: 38 mm across the mounted pair. Open on both faces, high carbon chrome steel rings and balls with a machined phenolic cage. The ISO equivalent is a 7209 at 25°.
Contact Angle: 25°. Precision Class: P4S (ABEC 7/9). Series: Fafnir 200WI, mapping to the ISO 72 medium dimension family, which gives the 7209 envelope of 45 x 85 x 19 mm. Arrangement: DUM, a universal duplex pairing. Preload: Medium. Searchable forms of the number: 3MM209WI-DUM, 3MM209WIDUM, 3MM-209-WI-DUM, 3MM 209WI DUM, 3MM209WI.
A 25° contact angle carries substantially more thrust than a 15° bearing in the same envelope, at the cost of some speed capability, which makes it the choice for a spindle or screw drive that sees real axial load. The 72 medium series gives a thicker ring section than the 70 light series, so it is stiffer under load at the same bore. The machined phenolic cage is light and self-lubricating and suits oil, oil-air or light grease.
Dynamic Load Rating: 43.0 kN (43,000 N / 9,650 lbf) per bearing. Static Load Rating: 23.6 kN (23,600 N / 5,330 lbf) per bearing. Item Weight: 0.96 lb (0.435 kg) per bearing. Maximum shaft or housing fillet radius cleared by the bearing corner: 1.0 mm (0.039 in).
Bearing Material: high carbon chrome bearing steel. Rolling Elements: steel balls. Number of Rows: 1 per bearing, 2 rows in the mounted set. Bore Type: Straight. Closure Type: Open, both faces. Cage Material: Phenolic (fabric-base laminate). Cage Type: Machined, outer-land riding. Internal Clearance: N/A — the DUM execution is preload-set. Lubricant: grease or oil.
Unit Quantity: 2 Pcs, one matched universal duplex set. The pair is ground as a matched unit at the factory, so it can be arranged back-to-back, face-to-face or in tandem, developing medium preload from the ground ring offset in any of those arrangements.
The same-specification equivalent at 25° and P4 in this envelope is the SKF 7209 ACD/P4A DGB, with the FAG B7209-E-T-P4S-DUM and NSK 7209A5TYNDUMP4 alongside it. A 2MM209WI-DUM shares the 45 x 85 x 19 mm envelope at 15°, making it a related size rather than an interchange, and a 3MM209WI-DUL is the same set at light preload.
Machine tool spindles, grinding spindles, screw drives and precision gearboxes. Harmonization Code: 8482.10.5028. Country of Origin: USA.
$43.38
64 in stock
$141.11
255 in stock
American manufacturers are sitting on a lot of stuff. The
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.
Sort
Brand
Price
MPN
Categories