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Super-precision spindle deep groove ball bearing, 45 x 85 x 19 mm, straight bore, ABEC 7/9 P4S. Open, machined phenolic cage, 16,000 rpm on grease.
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$60.27
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| MFR / Brand | Fafnir |
|---|---|
| MPN | MM209K |
| Model | MM 209 K / 6209 P4 |
| Bearing Type | Ball Bearing |
| ID | 45 mm |
| OD | 85 mm |
| Width | 19 mm |
| Condition | New – Open box |
|---|---|
| Base Number | MM209K |
| Industry Terms | spindle bearing, super precision deep groove, P4S bearing, ABEC 7 bearing, phenolic cage bearing, 6209 precision bearing, spindle ball bearing |
| Common Misspellings | Fafnir MM 209K, Faffnir MM209K, MM209KK, MN209K, MM2O9K, deep grove bearing 45x85x19 |
| Application Types | Machine tool spindles, grinding spindles, high-speed motor spindles, precision gearboxes |
| Condition Note | Made In USA, New Old Stock |
| Overall Width | 19 mm |
| Mpn Variants | MM209K, MM-209-K, MM 209 K, MM209KCR, M209K, 209K, Timken MM209K, 6209-P4, 6209 P4 |
| Manufacturer Status | Fafnir brand now owned by Timken; current Timken super-precision spindle designation |
| Compatible With Replaces | Positions calling a 45 x 85 x 19 mm super-precision deep groove ball bearing at P4S |
| Precision Class | ABEC 7/9 / P4S |
| Dynamic Load Rating C1 | 36,300 N |
| Additional Attributes | C1 ISO dynamic radial rating per row: 33,000 N. Maximum shaft fillet radius: 1 mm. Shaft backing shoulder diameter: 52.3 mm. Housing backing shoulder diameter: 78.2 mm. |
| Cage Type | Machined, inner-ring guided |
| Dynamic Load Rating | 36,300 N |
| Static Load Rating | 20,200 N |
| Precision Rating | ABEC 7/9 / P4S |
| Series | Fafnir 200K |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 16,000 rpm grease; 32,000 rpm oil |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Lubricant | Grease or oil |
| Design Units | Metric |
| Bearing Material | Chrome steel |
| Part Number | MM209K |
| Cross Reference 1 | NSK 6209P4 (precision deep groove, same 45 x 85 x 19 mm envelope) |
|---|---|
| Cross Reference 2 | FAG 6209-P4 (precision deep groove, same 45 x 85 x 19 mm envelope) |
| Cross Reference 3 | NTN 6209P4 (precision deep groove, same 45 x 85 x 19 mm envelope) |
| Cross Reference 4 | Koyo 6209P4 (precision deep groove, same 45 x 85 x 19 mm envelope) |
| Cross Reference 5 | RHP 6209TBP4 (precision deep groove, same 45 x 85 x 19 mm envelope) |
| Cross Reference 6 | SKF 6209/P5 (related, P5 precision grade, same 45 x 85 x 19 mm envelope) |
| Cross Reference 7 | Timken MM209K (Fafnir brand now Timken; identical part) |
| Cross Reference 8 | MRC 209S (related, standard-precision Conrad deep groove, same 45 x 85 x 19 mm envelope) |
| Cross Reference 9 | 6209 (related, standard-precision deep groove, same 45 x 85 x 19 mm envelope) |
Fafnir MM209K super-precision spindle deep groove ball bearing, Timken Fafnir 200K series. Bore Diameter: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm — the 6209 envelope. Precision Class: ABEC 7/9 / P4S. Dynamic Load Rating: 36,300 N. Static Load Rating: 20,200 N. Limiting Speed: 16,000 rpm grease; 32,000 rpm oil. Cage Material: Phenolic. Cage Type: Machined, inner-ring guided. Rolling Elements: Ball. Bore Type: Straight. Number Of Rows: 1. Closure Type: Open. Bearing Material: Chrome steel. Series: Fafnir 200K. Base Number: MM209K. Unit Quantity: 2 Pcs.
MM — Fafnir’s super-precision range. Precision Class: ABEC 7/9 / P4S.
209 — 200 dimension series, bore code 09: a 45 mm bore in an 85 mm outside diameter, 19 mm wide.
K — spindle deep groove construction, the Fafnir 200K family. Deep raceways in both rings carry radial load together with thrust from either direction.
A deep groove geometry takes thrust in both directions from a single bearing, so one MM209K locates a shaft axially on its own. Dynamic Load Rating: 36,300 N and Static Load Rating: 20,200 N with Limiting Speed: 16,000 rpm on grease and 32,000 rpm on oil — the speed figures are what separate a spindle-grade deep groove from a general-purpose 6209.
P4S is the super-precision grade, ABEC 7/9. Bore, outside diameter, width and running accuracy are all held far tighter than a standard-tolerance bearing, which is what keeps a spindle nose running true. Cage Material: Phenolic, machined and riding on the inner-ring lands: light, self-lubricating, and steady in its own plane at high shaft speed.
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.
Unit Quantity: 2 Pcs. Two bearings ship together on this listing.
The Fafnir line is now Timken, so Timken MM209K and Fafnir MM209K are the same part. Same 45 x 85 x 19 mm deep groove envelope at precision grades: NSK 6209P4, FAG 6209-P4, NTN 6209P4, Koyo 6209P4, RHP 6209TBP4. SKF 6209/P5, MRC 209S and the plain 6209 share the envelope at lower precision grades and are listed as related sizes. A 7209 angular contact bearing shares the same envelope but carries a contact angle and thrust in one direction only.
MM209K, MM-209-K, MM 209 K, M209K, 209K, 6209-P4, 6209 P4.
$45.69
23 in stock
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