ISO 9001 DNV GL Certification Mark ISO 14001 DNV GL Certification Mark

Radial cylindrical roller bearings, four rows with tapered bore

 

mrw0244

PRODUCT DESCRIPTION

Cylindrical roller bearing with four or more rows of rollers are used almost exclusively for rolling mills. They have lower friction than other roller bearings and can be successfully used where hight speed operation is called for. The low cross-sectional height of cylindrical roller bearings means that the roll necks can have large diameter in relation to the roll itself. In four rows cylindrical roller bearings, the rollers are guided between integral or not-integral flanges on the outer ring. The inner ring is without flanges; axial displacement of the shaft with respect to the housing can therefore be accomodated by the bearing within certain limits. Depending on the application, four rows cylindrical roller bearings can be supplied with a cylindrical bore or tapered bore. The inner or outer ring may be in one piece ore in more than one piece.

DIMENSIONS

The dimension of the bearings with the series designations listed in the tables comply to ISO 15-1981.

MISALIGNMENT

Multi-row cylindrical roller bearings are not designed to accomodate any misalignment.

TOLERANCES

Excluding particular request of costumers, four row cylindrical roller bearings with cylindrical or tapered bore have a dimensional accuracy corresponding to P6 tolerance class and a running accuracy to P5 tolerance class.

RADIAL INTERNAL CLEARANCE

Four row cylindrical roller bearing with cylindrical and tapered bore are produced with C3 or C4 radial internal clearance. On costumer’s request are available bearings with different radial internal clearances. All cylindrical roller bearings that presented helical groove on the inner ring bore, are made with C2 radial internal clearance.

CAGES

In relation to the execution, four row cylindrical roller bearing are fitted with either two double pronge machined roller guided cages of brass or steel, pin-types cages of steel (with pierced roller) or machined cages of brass with vent-hole. Some execution are supplied with steel pressed sheet.

HEAT TREATMENT

With some special exception, multi-row cylindrical roller bearing undergo special stabilizing treatment S0 which make them suitable for operating temperatures up to +150°C. On customer’s request it’s possible have other stabilizing treatment as:

> S1 (for working up to +200°C)

>S2 (for working up to +250°C)

INTERNATIONAL SUFFIXES

A/B/C/D/E – Deviating or modified internal design

C2 – Radial internal clearance less than Normal

C3 – Radial internal clearance greather than Normal

C4 – Radial internal clearance greather than C3

C5 – Radial internal clearance greather than C4

HA1 – Case-hardening of outer and inner rings

HA2 – Case-hardening of outer ring

HA3 – Case-hardening of inner ring

HA4 – Case-hardening of rollers, outer and inner rings

HB1 – Bainitic hardening for outer and inner rings

HB2 – Bainitic hardening for outer ring

HB3 – Bainitic hardening for inner ring

G – Helicoidal groove on the bore

K/K30 – Tapered bore, 1:12 on diameter (K); 1:30 on diameter (K30)

M – Machined brass cage

P4/P5/P6 – Dimensional and running accuracy to ISO tolerance class 4/5/6

VJ202 – Two rows bearing group

W – Lubrication groove on rings surface

WI – Lubrication groove on inner rings surface

WO – Lubrication groove on outer rings surfaces

W33 – Lubrication groove and three holes in outer ring

S0 – Stabilized rings up to 150°C

S1 – Stabilized rings up to 200°C

S2 – Stabilized rings up to 250°C

DOWNLOAD CAD MODELS

Untitled-1

 

MOUNTING DIMENSIONS
d D B
mm mm mm
MRW0201 105 150 71
MRW0202 125 180 100
MRW0203 140 210 155
MRW0204 151.5 230 168
MRW0205 151.5 230 168
MRW0206 160 240 175
MRW0207 160.7 260 178.7
MRW0208 162 230 130
MRW0209 170 260 160
MRW0210 175 260 180
MRW0211 181 260 180
MRW0212 181 260 180
MRW0213 181.5 260 168
MRW0214 181.5 260 168
MRW0215 182 260 168
MRW0216 183.3 280 200
MRW0217 190 280 200
MRW0218 190 290 180
MRW0219 192 270 170
MRW0220 200.8 310 230
MRW0221 202 290 192
MRW0222 202 290 207
MRW0223 202 290 202.2
MRW0224 205 310 225
MRW0225 228.3 325 200
MRW0226 230 330 220
MRW0227 231 330 235
MRW0228 246.7 380 280
MRW0229 255 370 249
MRW0230 260 400 250
MRW0231 260 400 285
MRW0232 266.3 400 285
MRW0233 320 480 350
MRW0234 340 520 300
MRW0235 356.7 550 400
MRW0236 365 540 300
MRW0237 382.5 590 450
MRW0238 412.3 650 488
MRW0239 412.3 650 488
MRW0240 412.5 630 450
MRW0241 440 650 355
MRW0242 485 740 540
MRW0243 511.6 780 580
MRW0244 551.7 830 580
MRW0245 571.6 870 640
MRW0246 571.7 870 640
MRW0247 606.7 920 640
MRW0248 633.3 960 680
MRW0249 773.3 1.1 800
MRW0250 811.7 1.2 850
MRW0251 918.4 1.3 950.1
MRW0252 950 1.4 1

Your name *

Company name *

Your email *

Phone number *

Your message

I have read the privacy policy *

Li-be.com uses cookies, also from third parts, in order to improve your browsing experience. By scrolling pages, clicking on links or images you agree with their use. Cookie Policy

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close