Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
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Angular contact ball bearing set, 80 x 125 x 22 mm section, 15° contact angle, counterbored outer ring, open, phenolic cage, ABEC 7, back-to-back.
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Angular Contact Ball Bearing - 80 mm ID, 140 mm OD, 26 mm Width, Open, 40° Contact Angle, Polyamide Cage, CN Internal Clearance.$73.03| MFR / Brand | MRC |
|---|---|
| Model | 7116 KRDTDB |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 80 mm |
| OD | 125 mm (4.9213 in) |
| Width | 44 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7100 |
| Lubricant | Oil/Grease |
| Preload | Matched duplex set, preload set by flush grinding |
| Total Width | 44 mm (1.7323 in) for the set |
| Base Number | 7116 |
| Industry Terms | precision angular contact bearing; spindle bearing; machine tool bearing; duplex set; matched pair; ABEC 7 bearing |
| Common Misspellings | M.R.C.; MCR; 7116KRDTB; 7116 KDRTDB; 7116KRTDDB; 71 16KRDTDB |
| Application Types | Machine tool spindles; grinding heads; precision gearboxes; rotary tables; high-speed spindle positions |
| Overall Width | 22 mm (0.8661 in) |
| Bore Shaft Size | 80 mm (3.1496 in) |
| Mpn Variants | 7116KRDTDB; 7116 KR DT DB; 7116KR-DTDB; 7116KRDT; 7116 KRDTDB; 7116KRDTDB ABEC-7 |
| Closure Type | Open |
| Rolling Elements | Ball |
| Number Of Rows | 2 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Part Number | 7116KRDTDB |
MRC 7116KRDTDB precision angular contact ball bearing set. Bearing Type: angular contact ball bearing set. Base Number: 7116. Series: 7100K, MRC’s extra-light angular contact section. Design Units: metric. Chrome steel balls run on a phenolic cage, rings open on both faces.
Bore: 80 mm (3.1496 in). Outside Diameter: 125 mm (4.9213 in). Overall Width: 22 mm (0.8661 in) per bearing. Total Width: 44 mm (1.7323 in) for the set. Bore Type: straight. Number Of Rows: 2. Rolling Elements: balls. Closure Type: open. Contact Angle: 15°. Cage Material: phenolic. Bearing Material: chrome bearing steel. Precision Class: ABEC 7 / P4. Dynamic Load Rating: 53.0 kN. Static Load Rating: 47.5 kN. Limiting Speed: 11,000 rpm. Internal Clearance: N/A. Lubricant: grease or oil. Operating temperature range: −30 °C to 120 °C, the phenolic cage setting the upper figure. Item Weight: 4.30 lb for the set. Harmonization Code: 8482.10.50.
Series: 7100K, angular contact, extra light. Bore code 16: 80 mm. Type R: 15° contact angle with a counterbored outer ring. DT: matched tandem execution. DB: back-to-back mounting. Precision Class: ABEC 7, equivalent to P4. Searchable forms of the number include 7116KRDTDB, 7116 KR DT DB, 7116KR-DTDB, 7116KRDT and 7116KRDTDB ABEC-7.
A 15° contact angle favours speed and radial rigidity over thrust capacity, which is what carries an 80 mm bore to an 11,000 rpm limiting speed. The counterbored outer ring gives each bearing one high shoulder, so each piece carries thrust in a single direction and the pair covers both. Back-to-back mounting sets the load lines divergent, which gives the stiffer moment reaction of the two duplex arrangements and holds shaft deflection better than a face-to-face set. ABEC 7 tolerances hold bore, outside diameter and raceway runout to super-precision limits, which is what keeps a spindle running true at speed.
Unit Quantity: 2 Pcs. Arrangement / Configuration: DT matched tandem execution, DB back-to-back mounting. Mounting Arrangement: back-to-back. Preload: matched duplex set, preload set by flush grinding. Faces are flush ground so the pair seats on a common shoulder and takes up its preload on clamp-up. Internal Clearance: N/A, since a preload-matched set and a clearance class are alternatives to one another.
ISO base number: 7016, the 80 x 125 x 22 mm envelope. A same-spec 15° super-precision equivalent is FAG B7016-C-T-P4S-DB, and SKF 7016 CD/P4A is a 15° interchange in the same section. A 29° or 40° bearing on the same envelope is a related size, carrying a different thrust-to-speed balance. The same envelope in a face-to-face (DF) execution is likewise a related size, since the ground offset and load path differ.
Country of origin: United States.
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