store 
Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
2 in stock
Angular contact ball bearing, 105 x 160 x 26 mm, 30° contact angle, machined brass cage, open. Cr 88 kN, C0r 81.5 kN, 4,300 rpm grease.
List Price
$296.49
2 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | NSK |
|---|---|
| MPN | 7021A |
| Model | 7021ADBC7 |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 105 mm |
| OD | 160 mm |
| Width | 26 mm |
| Material | Bearing Steel |
|---|---|
| Base Number | 7021 |
| Industry Terms | angular contact bearing, ACBB, spindle bearing, large bore thin section bearing, 30 degree angular contact, duplex bearing, back-to-back pair, 7000 series bearing, rotary table bearing |
| Common Misspellings | 7021 A, 7021-A, NSK 7021, 7021A bearing, 7021 AC, 7021ADCB7, 7021ADB, angular contract bearing, anglular contact bearing |
| Application Types | Large-bore machine tool spindles, boring mill quills, rotary and indexing tables, gear reducers, vertical pump and mixer shafts, extruders, press and rolling mill auxiliaries |
| Bore Shaft Size | 105 mm (4.1339 in) |
| Mpn Variants | 7021A; 7021 A; 7021-A; 7021ADB; 7021A DB; 7021ADBC7; 7021A DB C7; 7021-A-DB-C7; 7021ADCB7; 7021E; 7021 E; 7021ACD; 7021 ACD; 7021-ACD; 7021AC |
| Manufacturer Status | Current NSK catalogue size; RHP-branded equivalents were consolidated into NSK |
| Compatible With Replaces | Replaces NSK 7021A, 7021ADB, 7021E in the same 105x160x26 mm position. Same-envelope bearings from other makers exist at different contact angles (SKF 7021 CD is 15 degrees, 7021 ACD is 25 degrees) - verify the angle and precision class before substituting. |
| Precision Class | ISO Normal class |
| Additional Attributes | Effective load centre a: 51.2 mm; shaft abutment diameter da min: 115 mm; housing abutment diameter Da max: 150 mm; maximum shaft/housing fillet radius ra max: 2.0 mm; ring chamfer r min: 2.0 mm; ring chamfer r1 min: 1.0 mm |
| Cage Type | Machined cage |
| Dynamic Load Rating | 88,000 N (Cr, per bearing) |
| Static Load Rating | 81,500 N (C0r, per bearing) |
| Precision Rating | ISO Normal class |
| Item Weight | 1.84 kg (4.06 lb) |
| Cage Material | Machined brass |
| Limiting Speed | 4,300 rpm grease; 5,600 rpm oil bath |
| Number Of Rows | 1 |
| Harmonization Code | 8482.10 (ball bearings) |
| Contact Angle | 30° |
| Part Number | 7021A |
| Cross Reference 1 | NSK 7021ADB – back-to-back pair, not a single |
|---|---|
| Cross Reference 2 | NSK 7021C – 15° vs 30° |
| Cross Reference 3 | SKF 7021 CD/P4A – 15° vs 30° |
| Cross Reference 4 | SKF 7021 ACD/P4A – 25° vs 30° |
| Cross Reference 5 | FAG B7021-C-T-P4S – 15° vs 30° |
| Cross Reference 6 | FAG B7021-E-T-P4S – 25° vs 30° |
NSK 7021A single-row angular contact ball bearing. Bore: 105 mm. Outside Diameter: 160 mm. Width: 26 mm. Series: 70 (ISO dimension series 10, extra-light section). Contact Angle: 30°. Cage Material: Machined brass. Precision Class: ISO Normal. Closure: open on both sides.
Dynamic Load Rating: 88,000 N (Cr, per bearing). Static Load Rating: 81,500 N (C0r, per bearing). Limiting Speed: 4,300 rpm grease lubrication, 5,600 rpm oil-bath lubrication. These are single-bearing figures; a duplex set is rated separately.
Effective Load Centre a: 51.2 mm. Shaft Abutment Diameter da min: 115 mm. Housing Abutment Diameter Da max: 150 mm. Maximum Shaft or Housing Fillet Radius ra max: 2.0 mm. Ring Chamfer r min: 2.0 mm. Ring Chamfer r1 min: 1.0 mm. Mass: 1.84 kg (4.06 lb) per bearing.
70 — single-row angular contact ball bearing, dimension series 10, extra-light section.
21 — bore code, 21 x 5 = 105 mm.
A — 30° contact angle in NSK’s scheme.
DB — back-to-back duplex arrangement, carried on the carton for this lot.
C7 — a carton code retained as a searchable cross-reference.
At 105 mm bore the bearing is usually locating a heavy shaft axially while carrying a radial load. The 30° contact angle steepens the load line through the balls against the 15° 7021C, so it takes more one-direction thrust and deflects less under axial load. The trade is speed, and 4,300 rpm on grease is where that lands. The machined brass cage suits the higher loads and the elevated running temperatures that come with them. The 70-series extra-light section is the one to use where a large shaft has to fit inside a tight housing bore, on a boring mill quill, a rotary table, a large gear reducer or a vertical shaft.
Unit Quantity: 1 Pc. Each unit is one single bearing, sold loose. The carton designation carries a DB reference and is retained as a searchable cross-reference.
NSK 7021ADB is the same 30° bearing supplied as a back-to-back pair. The same 105 x 160 x 26 mm size at other contact angles: NSK 7021C, SKF 7021 CD and FAG B7021-C-T-P4S at 15°; SKF 7021 ACD and FAG B7021-E-T-P4S at 25°. NTN 7021, Koyo 7021 and NACHI 7021 are also made in this size. The 7021ACD and 7021E designations on this listing are 25° numbers carried because buyers search them.
$760.47
16 in stock
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
When an HMI panel goes dark or a PLC module stops communicating, the machine it
If you have ever watched a machine glide smoothly back and forth, tracing a perfect
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
