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Mikasa Industry

Monday, November 18, 2019
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CAUTION

1. The shaft must never be operated without water.
2. The clearance shown in the above list is to be considered for the application at normal temperature of water. When the water temperature reads more than 30°C, it is recommendable to have a little bigger clearance.
3. When inserting the shaft into our rubber bearings, any grease or oil must not be used. Soapy water is recommendable for the purpose.
4. Our rubber bearings should not be left near any heat, especially in direct sunshine for a long period of time.

PLANNING

(1) Maximum Load onto Rubber Bearings
Maximum Load onto Rubber Bearings
The maximum load in consideration of economical efficiency is 2.5 kgf/cm2 and, it is recommendable to use rubber bearings on the load between 1 to 1.5 kgf/cm2.
(2) Lubricating Water
Standard water volume necessary for rubber bearing is calculated on the following formula.
Shaft Dia. shown in centi-meter(cm)×3-3.5 liter per minute.
The above figure is considered to be enough for smooth rotation of shaft under different conditions.

Although the shaft may operate smoothly in the water without pump and pipe line, it is recommendable for rubber bearings to supply enough water with adequate pressure through pipelines.
In case of cutter shaft bearing of dredging vessel, a lot of sands or small stones are involved in the water and the required water volume is calculated on the under mentioned formula.
Necessary water volume for cutter shaft bearings of dredger:
Shaft Dia. shown in centi-meter (cm) ×8-10 liter per minute.

STANDARD MEASUREMENTS

1. Full molded type (Straight and Flanged type)
Full molded type
TYPE Inside
Dia(A)
Outside
Dia(D)
Inside Dia
of Shell
(B)
Thick
of
Shell
Thick
of
Rubber
Number
of
Grooves
Total
Length
Flange
A×2 A×4 Dia(E) Thick
LB-15 15 30 24 3 4.5 8(6) 30 60
LB-20 20 35 29 3 4.5 8(6) 40 80
LB-25 25 40 34 3 4.5 8(6) 50 100
LB-30 30 50 43 3.5 6.5 8(6) 60 120
LB-35 35 55 48 3.5 6.5 8 70 140
LB-40 40 60 53 3.5 6.5 8 80 160 120 13
LB-45 45 65 58 3.5 6.5 8 90 180 125 13
LB-50 50 70 63 3.5 6.5 8 100 200 130 13
LB-55 55 80 72 4 8.5 8 110 220 140 13
LB-60 60 85 77 4 8.5 8 120 240 150 13
LB-65 65 90 82 4 8.5 8 130 260 155 13
LB-70 70 95 87 4 8.5 8 140 280 160 14
LB-75 75 100 92 4 8.5 8 150 300 170 14
LB-80 80 110 100 5 10 8 160 320 175 14
LB-85 85 115 105 5 10 8 170 340 180 14
LB-90 90 120 110 5 10 8 180 360 185 14
LB-95 95 125 115 5 10 8 190 380 200 14
LB-100 100 130 120 5 10 8 200 400 210 15
LB-105 105 140 128 6 11.5 10 210 420 215 15
LB-110 110 145 133 6 11.5 10 220 440 230 15
LB-115 115 150 138 6 11.5 10 230 460 235 15
LB-120 120 155 143 6 11.5 10 240 480 240 15
LB-125 125 160 148 6 11.5 10 250 500 255 15
LB-130 130 165 153 6 11.5 12 260 520 265 15
LB-135 135 175 161 7 13 12 270 540 270 16
LB-140 140 180 166 7 13 12 280 560 275 16
LB-145 145 185 171 7 13 12 290 580 280 16
LB-150 150 190 176 7 13 12 300 600 295 16
LB-160 160 205 186 9.5 13 12 320 640 305 16
LB-170 170 215 196 9.5 13 12 340 680 320 18
LB-180 180 230 209 10.5 14.5 14 360 720 330 18
LB-190 190 240 219 10.5 14.5 14 380 760 340 18
LB-200 200 250 229 10.5 14.5 14 400 800 360 18
LB-210 210 270 243 13.5 16.5 14 420 840 370 20
LB-220 220 280 253 13.5 16.5 14 440 880 380 20
LB-230 230 290 263 13.5 16.5 14 460 920 390 20
LB-240 240 300 273 13.5 16.5 16 480 960 400 22
LB-250 250 310 283 13.5 16.5 16 500 1000 415 22
LB-260 260 325 293 16 16.5 16 520 1040 425 22
LB-270 270 335 303 16 16.5 16 540 1080 435 24
LB-280 280 345 313 16 16.5 16 560 1120 445 24
LB-290 290 355 323 16 16.5 18 580 1160 460 24
LB-300 300 370 334 18 17 18 600 1200 480 24
LB-310 310 380 344 18 17 18 620 1240 490 26
LB-320 320 390 354 18 17 18 640 1280 500 26
LB-330 330 400 364 18 17 20 660 1320 514 26
LB-340 340 414 376 19 18 20 680 1360 524 28
LB-350 350 424 386 19 18 20 700 1400 534 28
LB-360 360 434 396 19 18 22 720 1440 546 28
LB-370 370 446 406 20 18 22 740 1480 558 30
LB-380 380 458 418 20 19 22 760 1520 570 30
LB-390 390 470 428 21 19 22 780 1560 582 30
LB-400 400 482 440 21 20 24 800 1600 592 32
LB-410 410 494 450 22 20 24 820 1640 594 32
LB-420 420 506 462 22 21 24 840 1680 606 32
LB-430 430 518 472 23 21 24 860 1720 618 34
LB-440 440 530 484 23 22 26 880 1760 630 34
LB-450 450 542 494 24 22 26 900 1800 642 34

2. Segmental type

Segmental type
Strip
Segmental type
Kind of Strips

Kind Width
E(W1)
Height
H
Base Plate
h2
Width
of Groove
W2
S-1 42.67+0.15 -0 17.40 9 42.86+0.10 -0
S-2 45.85+0.15 -0 17.40 9 46.04+0.10 -0
S-3 49.02+0.15 -0 19.00 10.5 49.21+0.10 -0
S-4 52.20+0.15 -0 19.00 10.5 52.39+0.10 -0
S-5 55.37+0.15 -0 19.00 10.5 55.56+0.10 -0
S-6 58.55+0.15 -0 19.00 10.5 58.74+0.10 -0
S-7 69.67+0.15 -0 22.15 12 69.85+0.10 -0
S-8 74.42+0.15 -0 22.15 12 74.61+0.10 -0
S-9 77.60+0.15 -0 25.30 13.5 77.79+0.10 -0
S-10 80.77+0.15 -0 25.30 13.5 80.96+0.10 -0

PLANNING

(1) Maximum Load onto Rubber Bearings
Maximum Load onto Rubber Bearings
The maximum load in consideration of economical efficiency is 2.5 kgf/cm2 and, it is recommendable to use rubber bearings on the load between 1 to 1.5 kgf/cm2.
(2) Lubricating Water
Standard water volume necessary for rubber bearing is calculated on the following formula.
Shaft Dia. shown in centi-meter(cm)×3-3.5 liter per minute.
The above figure is considered to be enough for smooth rotation of shaft under different conditions.

Although the shaft may operate smoothly in the water without pump and pipe line, it is recommendable for rubber bearings to supply enough water with adequate pressure through pipelines.
In case of cutter shaft bearing of dredging vessel, a lot of sands or small stones are involved in the water and the required water volume is calculated on the under mentioned formula.
Necessary water volume for cutter shaft bearings of dredger:
Shaft Dia. shown in centi-meter (cm) ×8-10 liter per minute.