store 
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.
Availability:
7 in stock
Thin-section super-precision angular contact ball bearing duplex pair, 60 x 85 x 13 mm each, 25° contact angle, medium preload, phenolic cage.
List Price
$283.59
7 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9312WICRDUM |
| GTIN | 087796202474 |
| Model | 3MM9312WICRDUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 60 mm |
| OD | 85 mm |
| Width | 13 mm |
| Material | Chrome Steel |
|---|---|
| Series | 9300 |
| Preload | Medium |
| Base Number | 3MM9312WI |
| Common Misspellings | Fafner, Fafnier, Fanfir, 3MM9312W1, 3MM9312WL, 3MM 9312 WI DUM, 3MM9312WI-DUN, 71912-E, 7l912E, angular contract bearing, angular contact ball baering, duplux pair, super precison |
| Application Types | Compact machine tool spindles, CNC grinding and milling spindles, precision rotary tables, indexing heads, robotic joints, precision gearboxes, screw-driven precision axes, metrology and test spindles |
| Bore Shaft Size | 60 mm |
| Mpn Variants | 3MM9312WI-DUM, 3MM9312WIDUM, 3MM9312WI DUM, 3MM-9312-WI-DUM, 3MM-9312-WI-CR-DUM, 3MM9312WICRDUM, 3MM9312WI CR DUM, 3MM 9312 WI CR DUM, 3MM9312WI, 3 MM 9312 WI DUM, 7912A, 71912-A5 |
| Manufacturer Status | Fafnir super-precision bearings are supplied by Timken |
| Compatible With Replaces | Timken 71912E-T-P4S-DUM; FAG-scheme B71912E-T-P4S-DUM |
| Precision Class | ISO P4S, ABEC 7/9 |
| Additional Attributes | Universally ground duplex pair; medium preload (DUM); maximum shaft fillet radius 1 mm; shaft backing shoulder 65.3 mm; housing backing shoulder 80.2 mm; outer ring to-clear radius 1 mm; C1 ISO per row 19,500 N |
| Dynamic Load Rating | 21,400 N |
| Static Load Rating | 19,000 N |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 2 (duplex pair) |
| Bore Type | Straight |
| Snap Ring Included | No |
| Limiting Speed | 15,200 rpm grease; 27,600 rpm oil |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 3MM9312WI-DUM |
| Total Width | 26 mm (duplex pair) |
| Closure Type | Open |
| Cross Reference 1 | 71912E-T-P4S-DUM - Timken world number |
|---|---|
| Cross Reference 2 | B71912E-T-P4S-DUM - FAG-scheme form |
| Cross Reference 3 | SKF 71912 ACD/P4ADGB - 25 deg, light preload vs medium |
Fafnir 3MM9312WICRDUM (also written 3MM9312WI-DUM), a Timken thin-section super-precision angular contact ball bearing for machine tool spindles, supplied as a universally ground duplex pair at medium preload. Unit Quantity: 2 Pcs. Bore Diameter: 60 mm. Outside Diameter: 85 mm. Overall Width: 13 mm per bearing; Total Width: 26 mm as a duplex pair. Contact Angle: 25°. Preload: Medium.
3MM — Fafnir / Timken super-precision metric series, 25° contact angle.
9312 — 9300WI dimension series, 60 mm bore, ISO 19-series envelope.
WI — Fafnir super-precision spindle angular contact series.
CR — phenolic cage.
DU — duplex pair, universally ground.
M — medium preload.
Dynamic Radial Load Rating C1: 21,400 N (4,820 lbf). C1 ISO Dynamic Radial Rating per row: 19,500 N (4,380 lbf). Static Radial Load Rating C0: 19,000 N (4,270 lbf). Limiting Speed: 15,200 rpm grease; 27,600 rpm oil. Contact Angle: 25°. Preload: Medium. Precision Class: ISO P4S, ABEC 7/9. Cage Material: Phenolic. Rolling Elements: Steel balls. Bearing Material: Chrome steel. Closure Type: Open.
Bore Diameter: 60 mm. Outside Diameter: 85 mm. Overall Width: 13 mm per bearing. Total Width: 26 mm as a duplex pair. Maximum Shaft Fillet Radius: 1 mm. Shaft Backing Shoulder Diameter: 65.3 mm. Housing Backing Shoulder Diameter: 80.2 mm. Outer Ring To-Clear Radius: 1 mm. Straight bore. Universally ground rings take back-to-back, face-to-face or tandem arrangement.
Timken world part number: 71912E-T-P4S-DUM. FAG-scheme form: B71912E-T-P4S-DUM. SKF 71912 ACD/P4ADGB shares the 60 x 85 x 13 mm envelope and 25° angle, with light preload against this set’s medium. Also written as 3MM9312WIDUM, 3MM-9312-WI-CR-DUM, 3MM9312WI CR DUM, 3MM 9312 WI CR DUM, 71912E, 7912A and 71912-A5.
A universally ground duplex pair, 2 Pcs, of thin-section angular contact bearings matched to each other.
3MM is a 25° contact angle. The M in DUM is medium preload.
60 mm bore, 85 mm outside diameter, 13 mm width per bearing, 26 mm as a pair. Limiting speed 15,200 rpm with grease and 27,600 rpm with oil.
$231.30
29 in stock
$111.47
35 in stock
$231.30
29 in stock
$43.50
29 in stock
$137.64
92 in stock
American manufacturers are sitting on a lot of stuff. The
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.
Sort
Brand
Price
MPN
Categories
