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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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1 in stock
Super-precision angular contact ball bearing, 190 x 260 x 33 mm, 25° contact angle, class P4A. Two-piece set, universally matchable, extra light preload GA.
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$2,714.93
1 in stock
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| MFR / Brand | SKF |
|---|---|
| MPN | 71938ACD/DGA |
| Model | 71938ACDDGA 71938 ACD DGA VQ253 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 190 mm |
| OD | 260 mm |
| Width | 33 mm |
| Series | 71900 |
|---|---|
| Preload | Extra light (GA) |
| Material | Bearing Steel |
| Base Number | 71938 |
| Industry Terms | Spindle bearing; super-precision bearing; precision angular contact bearing; machine tool bearing; large-bore spindle bearing |
| Common Misspellings | 71938 ACDGA P4A; 71938ACGDA/P4A; 719 38 ACDGA; 71938ADCDGA; 71938 ACD DAG |
| Application Types | Machine tool spindles; grinding spindles; high-speed motor spindles; precision rotary tables |
| Overall Width | 33 mm |
| Mpn Variants | 71938 ACDGA/P4A; 71938-ACD/DGA; 71938-ACD-DGA-VQ253; 71938ACDP4ADGA; 7938A; 71938AC |
| Arrangement Configuration | Universally matchable, two-piece set |
| Precision Class | P4A |
| Cage Type | Outer-ring shoulder-guided |
| Dynamic Load Rating | 163,000 N |
| Static Load Rating | 208,000 N |
| Precision Rating | P4A |
| Rolling Elements | Ball |
| Item Weight | 4.33 kg (9.55 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 |
| Part Number | 71938-ACD/DGA |
| Cross Reference 1 | Timken/Fafnir 3MM9338WICRSUL |
|---|---|
| Cross Reference 2 | FAG B71938-E-T-P4S-UL |
| Cross Reference 3 | NSK 7938A5TRSULP4 |
| Cross Reference 4 | RHP 71938X3TRSULP4 |
SKF 71938 ACDGA/P4A super-precision, high-capacity, universally matchable single-row angular contact ball bearings. Bore Diameter: 190 mm. Outside Diameter: 260 mm. Overall Width: 33 mm. Contact Angle: 25°. Precision Class: P4A. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Cage Type: Outer-ring shoulder-guided. Bearing Material: Bearing steel. Item Weight: 4.33 kg (9.55 lb) per bearing.
719 — ISO extra-light dimension series. A 190 mm bore carries a 260 mm outside diameter in a 33 mm section.
38 — bore code. 38 × 5 = 190 mm.
AC — 25° contact angle. The higher angle carries more axial load and raises axial stiffness.
D — high-capacity internal design.
GA — universally matchable, extra light preload.
P4A — SKF super-precision tolerance class: P4 dimensional accuracy with running accuracy held tighter still.
Dynamic Load Rating: 163,000 N. Static Load Rating: 208,000 N. Both figures are per bearing. At this section the static rating sits well above the dynamic one, which is normal for the extra-light 719 series and sets a high permanent-deformation limit at rest.
Contact Angle: 25°. Radial load is carried together with axial load acting in one direction, with the steeper load line favouring thrust capacity and axial stiffness over top speed.
Closure Type: Open, supplied unlubricated and preserved for spindle-shop cleaning and grease or oil charging at build. Contact type is normal, two-point. Both rings are one piece.
Mounting Arrangement: universally matchable back-to-back, face-to-face or tandem. Bore Type: Straight. Item Weight: 4.33 kg (9.55 lb) per bearing. Harmonization Code: 8482.10.50.
Unit Quantity: 2 Pcs. Two universally matchable GA-class bearings, mountable in any of the three arrangements or usable singly.
Same envelope, same 25° angle, same super-precision class: Timken/Fafnir 3MM9338WICRSUL, FAG B71938-E-T-P4S-UL, NSK 7938A5TRSULP4, RHP 71938X3TRSULP4.
Preload class is part of the identity. GB (light preload) and GC (medium preload) are different parts on the same envelope.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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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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