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Super-precision angular contact ball bearing, 20 x 47 x 14 mm, 15° contact angle, phenolic cage, matched triplex set with light preload. Sold as a set of 3 pieces.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM204WICR-TUL |
| Model | 2MM 204 WI CR TUL / B 7204 C T P4 TUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 20 mm |
| OD | 47 mm |
| Width | 14 mm |
| Material | Bearing Steel |
|---|---|
| Series | 2MM200 |
| Condition | New |
| Preload | Light |
| Base Number | 7204 |
| Industry Terms | spindle bearing, super precision angular contact, triplex set, machine tool bearing, precision ball bearing |
| Common Misspellings | Fafner, Fafnier, Faffnir, 2MM204WL, 2MM204W1, 2M204WI |
| Application Types | Machine tool spindles, grinding spindles, high-speed rotary tables, precision gearboxes |
| Total Width | 42 mm (3 x 14 mm stacked) |
| Bore Shaft Size | 20 mm (0.7874 in) |
| Mpn Variants | 2MM204WI-TUL, 2MM204WITUL, 2MM-204-WI-TUL, 2MM204WICRTUL, 2MM204WI CR TUL |
| Arrangement Configuration | Universally ground triplex set (TUL) |
| Precision Class | P4S (ABEC 7/9) |
| Min Temp | -40 °C |
| Cage Type | Phenolic |
| Dynamic Load Rating | 16.6 kN |
| Static Load Rating | 8.0 kN |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 0.24 lbs |
| Cage Material | Phenolic |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15 degrees |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Internal Clearance | CN |
| Part Number | 2MM204WI-TUL |
| Cross Reference 1 | 7204-C (15 degree base designation) |
|---|---|
| Cross Reference 2 | 2MM204WICRTUL |
| Cross Reference 3 | 2MM204WI CR TUL |
A Fafnir super-precision angular contact ball bearing in the 7204 envelope, 20 mm bore × 47 mm outside diameter × 14 mm width, supplied as a factory-matched triplex set of three bearings ground for light preload.
2MM — 15° contact angle in the Fafnir WI scheme
MM prefix — P4S tolerance class (ABEC 7/9 running accuracy)
204 — ISO base size 7204
WI — ground-face style, faces prepared for stacking in matched sets
CR — phenolic outer-land-riding cage
TUL — triplex set, universally ground, light preload
A 15° contact angle favours speed and radial stiffness over thrust capacity; a 25° equivalent trades speed for thrust. The phenolic outer-land-riding cage runs light and quiet at high surface speeds and suits oil-mist and light-grease lubrication. P4S ground faces let the three rings stack with a repeatable, controlled internal preload once clamped.
Unit quantity: 3 Pcs, one matched triplex set
Arrangement: universally ground, stackable in tandem or back-to-back combinations
Preload: light
Universally ground rings stack in any face-to-face, back-to-back or tandem order. The clamp face is loaded evenly and squarely against the ground faces, since preload is set by those faces rather than by shims.
Written also as 2MM204WICRTUL, 2MM-204-WI-CR-TUL and 7204-C. Same-envelope bearings carrying 3MM (25°) or a different preload letter are related sizes rather than interchanges.
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