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, 55 x 80 x 13 mm, 25° contact angle, tolerance class P4A. Universally matchable, medium preload class GB.
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$162.48
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Super Precision Angular Contact Ball Bearing — 55 mm ID, 80 mm OD, 13 mm Width, 15° Contact Angle, Extra Light Preload, P4A$324.95
Angular Contact Ball Bearing — 55 mm ID, 80 mm OD, 13 mm Width, 15° Contact Angle, ABEC 7, Light Preload$124.67
Angular Contact Ball Bearing — 55 mm ID, 80 mm OD, 13 mm Width, 15° Contact Angle, ABEC 7 / P4S, Light Preload$285.32
Angular Contact Spindle Ball Bearing – 55 mm ID, 80 mm OD, 13 mm Width, 15° Contact Angle, P4$127.70| MFR / Brand | SKF |
|---|---|
| MPN | 71911CDP4ADGA |
| Model | 71911 ACD GA P4A / 3MM9311WI CR SUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 55 mm |
| OD | 80 mm |
| Width | 13 mm |
| Material | Bearing Steel |
|---|---|
| Series | 71900 |
| Preload | Medium |
| Base Number | 71911 |
| Industry Terms | Spindle bearing; super-precision bearing; precision angular contact bearing; machine tool bearing |
| Common Misspellings | 71911 ACDGB P4A; 71911 ACGDB/P4A; 71911ACD GB P4A; 719 11 ACDGB; 71911ACDG8/P4A |
| Application Types | Machine tool spindles; grinding spindles; high-speed motor spindles; precision rotary tables |
| Overall Width | 13 mm |
| Mpn Variants | 71911 ACDGB/P4A; 71911-ACDGB/P4A; 71911ACDGBP4A; 71911-ACD-GB-P4A; 71911CD/P4ADGB; 7911A5 |
| Arrangement Configuration | Universally matchable single bearing |
| Precision Class | P4A |
| Dynamic Load Rating | 18,200 N |
| Static Load Rating | 13,700 N |
| Precision Rating | P4A |
| Rolling Elements | Ball |
| Item Weight | 0.176 kg (0.39 lb) |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Mounting Arrangement | Universally matchable — back-to-back, face-to-face or tandem |
| Bearing Material | Bearing steel |
| Cross Reference 1 | Timken/Fafnir 3MM9311WICRSUM |
|---|---|
| Cross Reference 2 | FAG B71911-E-T-P4S-UM |
| Cross Reference 3 | NSK 7911A5TRSUMP4 |
| Cross Reference 4 | RHP 7911X3TRSUMP4 |
SKF 71911 ACDGB/P4A super-precision, high-capacity, universally matchable single-row angular contact ball bearing. Bore Diameter: 55 mm. Outside Diameter: 80 mm. Overall Width: 13 mm. Contact Angle: 25°. Precision Class: P4A. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Bearing steel. Item Weight: 0.176 kg (0.39 lb).
719 — ISO extra-light dimension series. A 55 mm bore carries an 80 mm outside diameter in a 13 mm section.
11 — bore code. 11 × 5 = 55 mm.
AC — 25° contact angle. The higher angle carries more axial load and raises axial stiffness.
D — high-capacity internal design.
GB — universally matchable, measuring load class B. Two or more bearings set against each other reach the medium preload step without shims or ground spacers.
P4A — SKF super-precision tolerance class: P4 dimensional accuracy with running accuracy held tighter still.
Dynamic Load Rating: 18,200 N. Static Load Rating: 13,700 N. The rating pair sets bearing life at speed and the permanent-deformation limit at rest.
Contact Angle: 25°. Combined radial and axial loading is carried with the axial component acting in one direction.
Contact type is normal, two-point. Both rings are one piece. Closure Type: Open, supplied unlubricated and preserved for spindle-shop cleaning and grease or oil charging at build.
Mounting Arrangement: universally matchable back-to-back, face-to-face or tandem. Bore Type: Straight. Item Weight: 0.176 kg (0.39 lb). Harmonization Code: 8482.10.50.
Unit Quantity: 1 Pc. A single universally matchable bearing, usable alone or paired with any other GB-class bearing of the same designation.
Same envelope, same 25° angle, same super-precision class: Timken/Fafnir 3MM9311WICRSUM, FAG B71911-E-T-P4S-UM, NSK 7911A5TRSUMP4, RHP 7911X3TRSUMP4.
Preload class is part of the identity. GA is the light step and GC the heavy step on the same envelope.
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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