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Super-precision angular contact ball bearing, 95 x 170 x 32 mm, 15 degree contact angle, ABEC 7 class, phenolic outer-land-riding cage, open. Single bearing, 1 Pc.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM219WI |
| Model | 7219 C T P4 / 2 MM 219 WI |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 95 mm |
| OD | 170 mm |
| Width | 32 mm |
| Material | Bearing Steel |
|---|---|
| Series | 2MM200 |
| Condition | New |
| Unspsc | 31171504 |
| Base Number | 7219 |
| Industry Terms | spindle bearing, machine tool bearing, super precision bearing, precision angular contact ball bearing, AC bearing |
| Common Misspellings | Fafner 2MM219WI, Faffnir 2MM219WI, Fafnier 2MM219WI, 2MM219W1, 2M219WI, 2MM2I9WI |
| Application Types | Machine tool spindles, grinding spindles, milling heads, high-speed gearboxes |
| Bore Shaft Size | 95 mm (3.7402 in) |
| Mpn Variants | 2MM219WI, 2MM-219-WI, 2MM 219 WI, 2MM219WICR, 2MM-219-WI-CR, MM219WI |
| Arrangement Configuration | Single bearing |
| Precision Class | ABEC 7 / ISO P4S |
| Min Temp | -40 °C |
| Cage Type | Phenolic |
| Dynamic Load Rating | 147 kN |
| Static Load Rating | 112 kN |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 5.88 lbs |
| Cage Material | Phenolic (fabric-reinforced laminate) |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.5028 |
| Contact Angle | 15 degrees |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Internal Clearance | C0 |
| Part Number | 2MM219WI |
| Cross Reference 1 | Timken 2MM219WI |
|---|---|
| Cross Reference 2 | SKF 7219 CD/P4A |
| Cross Reference 3 | FAG B7219-C-T-P4S |
| Cross Reference 4 | NSK 7219CTR |
A single-row super-precision angular contact ball bearing in the Fafnir 200WI spindle series, 95 mm bore × 170 mm outside diameter × 32 mm width. The ISO equivalent designation is 7219 C.
2MM — 15° contact angle, Fafnir super-precision spindle bearing.
219 — 200 dimension series, bore code 19, giving a 95 mm bore.
WI — spindle angular contact ball bearing, universally ground faces.
CR — phenolic cage riding on the outer ring land.
The MM prefix on a Fafnir spindle bearing carries P4S tolerances — ABEC 7 dimensional accuracy with ABEC 9 running accuracy.
A 15° contact angle biases the bearing toward speed and radial rigidity, and carries less thrust than a 25° bearing in the same envelope. Outer-land-riding phenolic cages are light, self-lubricating and dimensionally stable at high DN values, which is why they are standard on grinding and milling spindles. Phenolic places the working temperature ceiling near 120 °C.
Bore: 95 mm (3.7402 in)
Outside diameter: 170 mm (6.6929 in)
Width: 32 mm (1.2598 in)
Contact angle: 15°
Precision class: ABEC 7 / ISO P4S
Rows: 1
Cage: phenolic, outer-land-riding
Rolling elements: steel balls
Closure: open, both faces
ISO equivalent: 7219 C
Single bearing, 1 Pc. The universally ground faces allow assembly into a duplex or triplex stack of matching bearings, where the arrangement sets the preload.
Mounting is an interference fit on the shaft and a close fit in the housing bore, both held to super-precision spindle limits. The faces seat against square ground shoulders, and a runout error at the shoulder transfers directly into the raceway.
Same-spec 15° P4 equivalents in other schemes are the SKF 7219 CD/P4A, FAG B7219-C-T-P4S and NSK 7219CTR. The 3MM219WI shares the envelope at a 25° contact angle, which makes it a related size rather than an interchange.
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