DESIGN AND ADVANTAGES OF KVS ROLLING MILL BEARINGS-NEWS-FV BEARING INDUSTRIES
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DESIGN AND ADVANTAGES OF KVS ROLLING MILL BEARINGS

Nov 02, 2021


DESIGN AND OPERATING ADVANTAGES OF KVS series - 4 ROW TAPERED  ROLLER BEARINGS



FV Ultra-Capacity Sealed type Four-Row Tapered Roller Bearings are engineered specifically to withstand the heavy and impact loads transmitted radially and axially in the work rolls of rolling mill stands, delivering reliability and productivity in the most aggressive environments.



SEAL DESIGN MEASURES


1) High-load capacity design
New internal structure specifications are achieved with a compact main seal design, increasing bearing capacity
2) Main seal and holder
The heat and water-resistant main seal (KFM or HNBR) and its holder makes handling easier and minimizes risk of seal damage
3) Bore seal
The bore seal prevents the build-up of negative pressure that can cause the entry of water through the main seals

WATER-RESISTANT KYODO GREASE
Developed specifically for use with sealed type four-row tapered roller bearings, FV long-life water-resistant grease (KYODO PALMAX RBG) is elevated in base oil viscosity and special water-resistant additives.


Operating Benefits
› Inhibits water entry to rolling surface
› Minimizes premature flaking and rust
› More than doubles bearing flaking life versus conventional grease


DESIGN FEATURES
› Special design high capacity four-row tapered roller bearing
› With ultra-purity Cr-Mo steel and carbonitriding Cr-Ni-Mo alloy steel for dramatically longer service life under contaminated operating conditions
› With machined steel window and pin-type cages
› Spiral groove on the inner ring bore to prevent creeping wear on the roll neck shaft
› Advanced heat- and water-resistant main seal design, with bore seal to control negative pressure during rolling to prevent water infiltration
› Corrosion resistant phosphate coating option for inner ring
› Outer ring lubrication grooves and holes
› With special radial and axial internal clearances.
› Available in inch and metric design types.


PROVEN ADVANTAGES
› Higher reliability and longer operating life with ultra-purity Cr-Mo steel and carbonitriding Cr-Ni-Mo alloy steel, reducing bearing replacement and maintenance intervals.
› Higher load capacity derived from optimized internal design, as much as 35% greater than conventional KVE sealed bearings.
› Sealed design solution extends bearing performance exponentially, significantly reducing grease consumption and corresponding maintenance costs / downtime.
› Made in China has the same price advantage.


BEARINGS TABLE LIST FOR CHOOSE                                                                                                                                                                                                FV BEARINGS - KVS SERIES - FOUR ROW TAPERED ROLLER BEARINGS - CODE LIST                                                                                                                        

BASIC
BEARING
CODE

(OEM)

BEARING DIMENSIONS(mm)

BASIC LOAD RATINGS

(kN)

d

D

B4

C4

r min

r1 min

Dynamic

Static

STF215KVS2851Eg

215.9

288.925

177.8

177.8

3.3

0.8

1 070

2 350

STF216KVS3351Eg

216.103

330.2

263.525

269.875

3.3

1.5

2 290

4 550

STF220KVS3151Eg

220.662

314.325

239.712

239.712

3.3

1.5

1 960

4 350

STF228KVS3151Eg

228.6

311.15

200.025

200.025

3.3

1.5

1 560

3 500

STF234KVS3251Eg

234.95

327.025

196.85

196.85

3.3

1.5

1 550

3 200

STF241KVS3451Eg

241.478

349.148

228.6

228.6

3.3

1.5

2 020

4 150

STF244KVS3251Eg

244.475

327.025

193.68

193.68

3

1.5

1 370

3 050

STF254KVS3552Eg

254

358.775

269.875

269.875

3.3

1.5

2 420

5 500

STF260KVS3651Eg

260

365

340

340

4

2.5

2 960

7 350

STF260KVS4251Eg

260.35

422.275

314.325

317.5

3.3

6.4

3 600

7 050

STF266KVS3551Eg

266.7

355.6

230.188

228.6

3.3

1.5

1 960

4 600

STF276KVS3952Eg

276.225

393.7

269.875

269.875

3.3

1.5

2 720

6 100

STF279KVS3952Eg

279.4

393.7

269.875

269.875

6.4

1.5

2 720

6 100

STF279KVS3954Eg

279.4

393.7

320

320

6.4

1.5

3 100

7 350

STF304KVS4351Eg

304.648

438.048

280.99

279.4

3.3

3.3

3 100

6 750

STF304KVS4155Eg

304.8

419.1

269.875

269.875

6.4

1.5

2 850

6 550

STF304KVS4152Eg

304.902

412.648

266.7

266.7

3.3

1.5

2 760

6 500

STF317KVS4251Eg

317.5

422.275

269.875

269.875

3.3

1.5

2 740

6 750

STF317KVS4451Eg

317.5

447.675

367

367

3

3.6

3 850

9 500

STF343KVS4551Eg

340.052

457.098

254

254

3.3

1.5

2 830

6 700

STF355KVS4551Eg

355.6

457.2

252.412

252.412

3.3

1.5

2 650

6 750

STF355KVS4851Eg

355.6

482.6

265.112

269.875

3.3

1.5

3 100

7 200

STF374KVS5051Eg

374.65

501.65

250.825

260.35

3.3

1

2 970

7 150

STF384KVS5451Eg

384.175

546.1

400.05

400.05

6.4

3.3

5 250

12 400

STF385KVS5151Eg

385.762

514.35

317.5

317.5

3.3

3.3

4 150

10 400

STF406KVS5451Eg

406.4

546.1

288.925

288.925

6.4

1.5

3 950

9 450

STF406KVS5452Eg

406.4

546.1

330

330

6.4

1

4 350

11 000

STF406KVS5651Eg

406.4

562

381

381

6.4

3.3

4 950

11 900

STF409KVS5451Eg

409.575

546.1

334.962

334.962

6.4

1.5

4 500

11 700

STF457KVS5951Eg

457.2

596.9

276.225

279.4

3.3

1.5

4 000

9 850

STF482KVS6151Eg

482.6

615.95

330.2

330.2

6.4

4.3

4 900

13 500

STF489KVS6351Eg

489.026

634.873

320.675

320.675

3.3

3.3

4 850

12 500

STF558KVS7353Eg

558.8

736.6

455.6

457.2

6.4

3.3

8 300

23 000

STF585KVS7751Eg

585.788

711.525

479.425

479.425

6.4

3

8 250

22 700

STF660KVS8151Eg

660.4

812.8

365.125

365.125

6.4

3.3

6 050

17 700

STF708KVS9351Eg

708.025

930.275

565.15

565.15

6.4

3.3

12 000

34 000

Sealed Design Four-Row Tapered Roller Bearings are manufactured with FV ultra-purity Cr-Mo steel and carbonitriding Cr-Ni-Mo alloy steel material as the standard specification.

Bearings shown are inch dimension. Additional bearing designs / sizes - including open bearings and metric dimensions - are available. Please contact FV for additional info.


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FV Bearing is a leading supplier of precision bearings and bearings related products across a large spectrum of customers – preimarily OEMs and major distributors.

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FV Bearings Co.Ltd has rich experiences in bearings manufacturing and processing, the professional bearing engineers can handle your requirements on bearings exactly and output the accurate bearing products.

World’s leading roller bearings manufacturer

FV Bearings is a leading roller bearings manufacturer provides high quality and durable roller bearings for different industries such as automotive, aerospace, machinery, power plants, chemistry industry, agriculture and other fields.

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If you are looking for special bearings and high end bearings, FV bearings can help you to customize any special bearings according to your needs based on advanced bearings manufacturing technology.

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