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.
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Super-precision angular contact ball bearing, 110 x 170 x 28 mm, 25° contact angle, ISO P4S tolerance, phenolic outer-land-riding cage, open, steel balls.
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Super Precision Angular Contact Ball Bearing 110 x 170 x 28 mm, 25° Contact Angle, ABEC 7, Phenolic Cage, Medium Preload$973.43
Angular Contact Ball Bearing - Straight Bore, 60 mm ID, 95 mm OD, 18 mm Width, Open, 25° Contact Angle, Light Preload.$107.09
Angular Contact Ball Bearing – 110 mm Bore, 170 mm OD, 28 mm Width, 15° Contact Angle, Open$152.02
Double-Direction Axial Angular Contact Ball Bearing - 110 mm ID, 170 mm OD, 72 mm Width, 60° Contact Angle, Brass Cage, P5$350.49| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9122 |
| Model | 3MM 9122 7022A |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 110 mm |
| OD | 170 mm |
| Width | 28 mm |
| Material | Bearing Steel |
|---|---|
| Series | 9100 |
| Preload | None specified — the designation carries no preload code, consistent with a single rather than a matched pair |
| Base Number | 7022 |
| Industry Terms | spindle bearing; super precision angular contact; 25 degree contact angle; ABEC 7; machine tool bearing; milling spindle bearing |
| Application Types | Milling and boring spindles; machine-tool spindles requiring axial stiffness |
| Total Width | 28 mm (1.102 in) |
| Bore Shaft Size | 110 mm |
| Mpn Variants | 3MM9122; 3MM-9122; 3MM 9122; 3MM9122WI; 9122 |
| Manufacturer Status | Legacy Fafnir designation; Fafnir super-precision production passed to The Timken Company |
| Arrangement Configuration | Single bearing, single row of balls |
| Precision Class | P4S (ABEC 7 dimensional, ABEC 9 running accuracy) |
| Dynamic Load Rating C1 | 103 200 N (23 200 lbf) - Timken C1, 1M revs, single bearing |
| Additional Attributes | Max shaft fillet radius 2 mm; shaft backing shoulder diameter 122.3 mm; housing backing shoulder diameter 158.4 mm; outer ring to-clear radius 2.0 mm; Timken world part number 7022E-T-P4S |
| Min Temp | -30 °C |
| Cage Type | CR - Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 103 200 N (23 200 lbf) - Timken C1, 1M revs, single bearing |
| Static Load Rating | 97 400 N (21 900 lbf) - C0 |
| Precision Rating | ISO P4S (ABEC 7/9) |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 4.50 lbs |
| Cage Material | Phenolic (Timken MBR) |
| Limiting Speed | 6 800 rpm grease / 13 600 rpm oil |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Not specified |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Part Number | 3MM9122 |
| Cross Reference 1 | Timken world part number 7022E-T-P4S |
|---|---|
| Cross Reference 2 | NSK 7022A5 (A5 = 25 degrees) |
| Cross Reference 3 | SKF 7022 ACD/P4A (AC = 25 degrees) |
| Cross Reference 4 | FAG B7022-E-T-P4S |
| Cross Reference 5 | 7022 A5T P4 (carton marking) |
| Cross Reference 6 | 7022-A (carton marking) |
| Cross Reference 7 | Fafnir 2MM9122WI (related size, 15 degree contact angle) |
Fafnir 3MM9122 super-precision angular contact ball bearing, manufactured by The Timken Company. Bore: 110 mm. Outside Diameter: 170 mm. Bearing Width: 28 mm. Total Width: 28 mm. Rows per Set: single. Contact Angle: 25°. Precision Rating: ISO P4S (ABEC 7/9). Cage Type: CR — Phenolic Outer Land Riding Cage. Ball Type: steel. Closure Type: open. Bore form: straight. Design Units: metric. Series: Fafnir 9100WI, the ISO 7022 section. Timken World Part Number: 7022E-T-P4S.
Dynamic Radial Load Rating, 1M revolutions (C1): 103 200 N (23 200 lbf), single bearing. Dynamic Radial Load Rating, ISO C1 per row: 94 100 N (21 200 lbf). Static Radial Load Rating (C0): 97 400 N (21 900 lbf). Limiting Speed, grease: 6 800 rpm. Limiting Speed, oil: 13 600 rpm.
3MM: 25° contact angle in the Fafnir super-precision scheme, where the companion 2MM prefix is 15°. MM: the super-precision execution, Precision Class P4S. 9122: the 9100WI light dimension series with ISO bore code 22, giving the 7022 section at 110 x 170 x 28 mm. Searchable forms include 3MM9122, 3MM-9122, 3MM 9122, 3MM9122WI and 9122.
A 25° contact angle carries considerably more thrust per unit of radial load than a 15° bearing and holds axial position better under interrupted cutting, at a lower speed ceiling: 6 800 rpm on grease against the 7 500 rpm of the 15° 2MM9122WI on the same envelope. It is the milling and boring spindle grade. P4S holds radial and axial runout to a few microns, giving low running vibration and close, repeatable shaft location. The phenolic outer land riding cage is low in mass and retains oil in the resin.
Max Shaft Fillet Radius: 2 mm (0.079 in). Shaft Backing Shoulder Diameter: 122.3 mm (4.820 in). Housing Backing Shoulder Diameter: 158.4 mm (6.240 in). Outer Ring To-Clear Radius: 2.0 mm (0.079 in).
Unit Quantity: 1 Pc. Single bearing, single row of balls. Preload grade: not carried by this designation.
ISO base number 7022, 25° executions. Timken world part number 7022E-T-P4S, where E is Timken’s 25° suffix. NSK-scheme equivalent 7022A5, where A5 is 25°. SKF-scheme equivalent 7022 ACD/P4A, where AC is 25°. FAG B7022-E-T-P4S. The carton also carries the markings 7022 A C D P4A and 7022 A5T P4. A 15° bearing on this envelope, such as the Fafnir 2MM9122WI, is a related size at a different contact angle.
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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.
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