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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
1 in stock
Super-precision angular contact ball bearing, 100 x 180 x 34 mm, 15° contact angle, phenolic cage. Two universally ground singles, medium preload, P4S.
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$495.44
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM220WISUM |
| GTIN | 087796322035 |
| Model | 2MM220WI-SUM |
| Bearing Type | Ball Bearing, Open |
| ID | 100 mm |
| OD | 180 mm |
| Width | 34 mm |
| Material | Bearing Steel |
|---|---|
| Series | 2MM200WI |
| Preload | Medium |
| Lubricant | Grease or oil |
| Base Number | 2MM220WI |
| Industry Terms | Super precision spindle bearing; machine tool bearing; universally ground single; ABEC 7 spindle bearing |
| Common Misspellings | 2MM220WICRSU M; 2MM22OWISUM; 2MM220W1SUM; 2MM220-WI-CR-SUM |
| Application Types | Machine tool spindles; CNC milling and boring spindles; precision grinding spindles; heavy-duty rotary tables |
| Overall Width | 34 mm |
| Mpn Variants | 2MM220WICRSUM; 2MM220WI-SUM; 2MM-220-WI-SUM; 2MM 220 WI CR SUM; 7220C-T-P4S-SUM |
| Precision Class | ABEC 7/9 / P4S |
| Dynamic Load Rating | 165,200 N |
| Static Load Rating | 126,800 N |
| Rolling Elements | Ball |
| Item Weight | 3.209 kg (7.07 lb) |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Limiting Speed | 8,000 rpm grease; 16,000 rpm oil |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Universally ground single (SU) |
| Design Units | Metric |
| Bearing Material | Bearing steel |
| Cross Reference 1 | FAG B7220-C-T-P4S-UM – 15°, phenolic, medium preload |
|---|---|
| Cross Reference 2 | NSK 7220CTRSUMP4 – 15°, phenolic, medium preload |
| Cross Reference 3 | RHP 7220CTSUMP4 – 15°, phenolic, medium preload |
| Cross Reference 4 | GMN S6220 C TA P4 DUM – 15°, phenolic cage |
| Cross Reference 5 | Fafnir 2MM220WI-SUL – light vs medium preload |
| Cross Reference 6 | SKF 7220 CD/P4A – 15°, single, not universal ground |
| Cross Reference 7 | NTN 7220CP4 – 15°, single, not universal ground |
| Cross Reference 8 | Koyo 7220C-P4 – 15°, single, not universal ground |
| Cross Reference 9 | NACHI 7220C/P4 – 15°, single, not universal ground |
Fafnir 2MM220WICRSUM is a super-precision angular contact ball bearing, universally ground as a single for duplex service. Bore Diameter: 100 mm. Outside Diameter: 180 mm. Overall Width: 34 mm. Contact Angle: 15°. Bore Type: Straight. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1. Cage Material: Phenolic. Bearing Material: Bearing steel. The envelope is the ISO 7220 size.
2MM — Timken Fafnir super-precision at a 15° contact angle. The 2 prefix carries the angle; MM is the P4S precision grade, which holds ABEC 9 / ISO P2 running accuracy on an ABEC 7 / ISO P4 body.
220 — the 200WI dimension series at bore code 20, which is ISO 72-series size 7220 at 100 x 180 x 34 mm. The 200 series is the heavier section of the two spindle ranges, trading speed for capacity and stiffness.
WI — Timken’s standard angular contact construction: full shoulders on both sides of the inner ring and a low shoulder on the outer ring.
CR — phenolic composition cage, Timken’s standard cage for super-precision spindle bearings.
SUM — single, universally ground, medium preload. Faces are ground flush so two or more bearings stack back to back, face to face or in tandem and reach medium preload without shims.
Dynamic Load Rating: 165,200 N. Static Load Rating: 126,800 N. Both are Timken C1 and C0 values for a single bearing.
Limiting Speed: 8,000 rpm grease; 16,000 rpm oil. Lubricant: Grease or oil.
Contact Angle: 15°. A shallow angle favours speed and radial stiffness over axial capacity, which is the trade a machine tool spindle wants.
Preload: Medium. Medium preload sits between the light grade, chosen where speed governs, and the heavy grade, chosen where stiffness governs.
Precision Class: ABEC 7/9 / P4S. Super-precision grinding holds bore, outside diameter and raceway running accuracy far tighter than a standard-class bearing, which is what keeps spindle runout and running vibration low at speed.
Bore Diameter: 100 mm. Outside Diameter: 180 mm. Overall Width: 34 mm. Shaft Backing Shoulder Diameter: 114.4 mm (4.510 in). Housing Backing Shoulder Diameter: 166 mm (6.540 in). Maximum housing fillet radius that the bearing corners will clear: 2.1 mm (0.079 in). Item Weight: 3.209 kg (7.07 lb) per bearing, 6.418 kg (14.14 lb) for the two together.
Unit Quantity: 2 Pcs. Two universally ground SUM singles, which stack to a medium-preload duplex pair in any of the three orientations. Mounting Arrangement: Universally ground single (SU). Series: 2MM200WI. Base Number: 2MM220WI. GTIN: 087796322035. Harmonization Code: 8482.10.50.
The ISO 7220 envelope at 15° and P4-class precision is made by every major super-precision manufacturer, and the equivalents are listed in the cross-reference fields. Match preload as well as angle: 2MM220WI-SUM is ground to medium preload and 2MM220WI-SUL to light, and the two carry different Timken UPCs while sharing identical ratings and dimensions.
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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