Product Description
Product Description
Excavator Bearing – Angular Contact Ball Bearing
Angular contact ball bearings are nonseparable bearings with a defined contact angle in the radial direction relative to the straight line that runs through the point where each ball makes contact with the inner and outer rings. In addition to radial loads, angular contact ball bearings can accommodate single direction axial loads. Since an axial load is generated from a radial force, these bearings are generally used in pairs. Typically ideal for machine tools, feed screw mechanisms, ball screw support units, etc.
Applications
Because they can bear heavy loads, angular contact bearings are used for heavy machinery and agricultural equipment. These bearings help run pumps, electric motors, gearboxes, steel mills, windmills, conveyors, and other high-speed applications.
Single Row Angular Contact Ball Bearing
Bearing type | Boundary Dimensions(mm) | Load Rating (kn) |
Speed Rating(ipm) | Weight | |||||
New Model | Old Model | d | D | B | Dymamic Cr | Static Cor | Grease lubrication |
Oil lubrication |
Weight (kg) |
7000AC | 46100 | 10 | 26 | 8 | 5 | 2.35 | 34000 | 42000 | 0.571 |
7001AC | 46101 | 12 | 28 | 8 | 5.4 | 2.75 | 29000 | 37000 | 0.571 |
7002AC | 46102 | 15 | 32 | 9 | 6.1 | 3.45 | 26000 | 32000 | 0.035 |
7003AC | 46103 | 17 | 35 | 10 | 6.75 | 4.15 | 23000 | 28000 | 0.045 |
7004AC | 46104 | 20 | 42 | 12 | 10.3 | 6.1 | 19000 | 24000 | 0.079 |
7005AC | 46105 | 25 | 47 | 12 | 11.3 | 7.4 | 17000 | 21000 | 0.091 |
7006AC | 46106 | 30 | 55 | 13 | 14.5 | 10.1 | 14000 | 18000 | 0.133 |
7007AC | 46107 | 35 | 62 | 14 | 17.5 | 12.6 | 12000 | 15000 | 0.17 |
7008AC | 46108 | 40 | 68 | 15 | 18.7 | 14.6 | 11000 | 14000 | 0.21 |
7009AC | 46109 | 45 | 75 | 16 | 22.2 | 17.7 | 10000 | 12000 | 0.26 |
7571AC | 46110 | 50 | 80 | 16 | 23.6 | 20.1 | 9200 | 11000 | 0.29 |
7011AC | 46111 | 55 | 90 | 18 | 31.1 | 26.3 | 8300 | 10000 | 0.42 |
7012AC | 46112 | 60 | 95 | 18 | 31.9 | 28.1 | 7700 | 9700 | 0.45 |
7013AC | 46113 | 65 | 100 | 18 | 33.7 | 31.4 | 7200 | 9000 | 0.47 |
7014AC | 46114 | 70 | 110 | 20 | 42.7 | 39.4 | 8300 | 0.66 | |
7015AC | 46115 | 75 | 115 | 20 | 43.6 | 41.7 | 6300 | 7800 | 0.69 |
7016AC | 46116 | 80 | 125 | 22 | 53.4 | 50.6 | 5800 | 7200 | 0.93 |
7017AC | 46117 | 85 | 130 | 22 | 54.6 | 53.7 | 5500 | 6800 | 0.97 |
7018AC | 46118 | 90 | 140 | 24 | 65.2 | 63.3 | 5100 | 6400 | 1.26 |
7019AC | 46119 | 95 | 145 | 24 | 66.6 | 67.1 | 4800 | 6000 | 1.32 |
7571AC | 46120 | 100 | 150 | 24 | 68.4 | 70.6 | 4700 | 5900 | 1.37 |
7571AC | 46121 | 105 | 160 | 26 | 79.8 | 81.9 | 4400 | 5500 | 1.73 |
7571AC | 46122 | 110 | 170 | 28 | 91.9 | 92.8 | 4200 | 5200 | 2.14 |
7571AC | 46124 | 120 | 180 | 28 | 96.6 | 103 | 3900 | 4900 | 2.27 |
7026AC | 46126 | 130 | 200 | 33 | 117 | 125 | 3500 | 4400 | 3.43 |
7571AC | 46128 | 140 | 210 | 33 | 120 | 133 | 3300 | 4100 | 3.64 |
7030AC | 46130 | 150 | 225 | 35 | 137 | 154 | 3000 | 3800 | 4.43 |
7032AC | 46132 | 160 | 240 | 38 | 5.02 | ||||
7034AC | 46134 | 170 | 260 | 42 | 186 | 214 | 2600 | 3200 | 7.56 |
7038AC | 46138 | 190 | 290 | 46 | 217 | 268 | 2300 | 2800 | 10.8 |
7040AC | 46140 | 200 | 310 | 51 | 244 | 309 | 2100 | 2600 | 12.7 |
Bearing type | Boundary Dimensions(mm) | Load Rating (kn) |
Speed Rating(ipm) | Weight | |||||
New Model | Old Model | d | D | B | Dymamic Cr | Static Cor | Grease lubrication |
Oil lubrication |
Weight (kg) |
7200AC | 46200 | 10 | 30 | 9 | 4.65 | 2.2 | 29000 | 37000 | 0.031 |
7201AC | 46201 | 12 | 32 | 10 | 7.45 | 3.65 | 27000 | 34000 | 0.038 |
7202AC | 46202 | 15 | 35 | 11 | 8.1 | 4.25 | 24000 | 29000 | 0.048 |
7203AC | 46203 | 17 | 40 | 12 | 10.2 | 5.5 | 21000 | 26000 | 0.07 |
7204AC | 46204 | 20 | 47 | 14 | 14.5 | 8.4 | 17000 | 22000 | 0.112 |
7205AC | 46205 | 25 | 52 | 15 | 15.3 | 9.5 | 15000 | 19000 | 0.135 |
7206AC | 46206 | 30 | 62 | 16 | 21.3 | 13.7 | 13000 | 16000 | 0.208 |
7207AC | 46207 | 35 | 72 | 17 | 28.1 | 18.6 | 11000 | 14000 | 0.295 |
7208AC | 46208 | 40 | 80 | 18 | 33.6 | 23.3 | 10000 | 12000 | 0.382 |
7209AC | 46209 | 45 | 85 | 19 | 37.7 | 26.6 | 9400 | 12000 | 0.43 |
7210AC | 46210 | 50 | 90 | 20 | 39.4 | 41.3 | 8500 | 11000 | 0.485 |
7211AC | 46211 | 55 | 700 | 21 | 48.7 | 37.1 | 7600 | 9500 | 0.635 |
7212AC | 46212 | 60 | 110 | 22 | 58.9 | 45.7 | 6900 | 8600 | 0.82 |
7213AC | 46213 | 65 | 120 | 23 | 67.3 | 54.2 | 6400 | 8000 | 1.02 |
7214AC | 46214 | 70 | 125 | 24 | 69.8 | 55.6 | 6100 | 7600 | 1.12 |
7215AC | 46215 | 75 | 130 | 25 | 79.2 | 65.2 | 5800 | 7200 | 1.23 |
7216AC | 46216 | 80 | 140 | 26 | 85.3 | 71.5 | 5400 | 6700 | 1.5 |
7217AC | 46217 | 85 | 150 | 28 | 98.6 | 83.6 | 5000 | 6300 | 1.87 |
7218AC | 46218 | 90 | 760 | 30 | 113 | 96.7 | 4700 | 5900 | 2.3 |
7219AC | 46219 | 95 | 770 | 32 | 122 | 103 | 4400 | 5500 | 2.78 |
7220AC | 46220 | 100 | 180 | 34 | 137 | 117 | 4100 | 5200 | 3.32 |
7221AC | 46221 | 105 | 190 | 36 | 149 | 132 | 3900 | 4900 | 3.95 |
7222AC | 46222 | 110 | 200 | 38 | 162 | 148 | 3700 | 4600 | 4.65 |
7224AC | 46224 | 130 | 215 | 40 | 174 | 166 | 3400 | 4300 | 5.49 |
7226AC | 46226 | 130 | 230 | 40 | 196 | 198 | 3200 | 4000 | 6.21 |
7228AC | 46228 | 140 | 250 | 42 | 218 | 234 | 2900 | 3600 | 7.76 |
7232AC | 46232 | 160 | 290 | 48 | 230 | 263 | 2500 | 3100 | 12.1 |
7234AC | 46234 | 170 | 370 | 52 | 272 | 331 | 2300 | 2800 | 15.1 |
7236AC | 46236 | 180 | 320 | 52 | 293 | 362 | 2200 | 2700 | 15.7 |
7240AC | 46240 | 200 | 360 | 58 | 324 | 432 | 1900 | 2400 | 22.4 |
7244AC | 46244 | 220 | 400 | 65 | 358 | 482 | 1100 | 1600 | 38.5 |
Bearing type | Boundary Dimensions(mm) | Load Rating | Speed Rating(ipm) | Weight | |||||
(kn) | |||||||||
New Model | Old Model | d | D | B | Dymamic Cr | Static Cor | Grease | Oil | Weight |
lubrication | lubrication | (kg) | |||||||
7300AC | 46300 | 10 | 35 | 11 | 8.5 | 3.75 | 27000 | 33000 | 0.054 |
7301AC | 46301 | 12 | 37 | 12 | 10.2 | 4.6 | 24000 | 31000 | 0.065 |
7302AC | 46302 | 15 | 42 | 13 | 12.5 | 6.45 | 20000 | 25000 | 0.088 |
7303AC | 46303 | 17 | 47 | 14 | 14.9 | 7.9 | 18000 | 23000 | 0.12 |
7304AC | 46304 | 20 | 52 | 15 | 17.4 | 9.4 | 17000 | 21000 | 0.15 |
7305AC | 46305 | 25 | 62 | 17 | 24.8 | 14.4 | 14000 | 17000 | 0.243 |
7306AC | 46306 | 30 | 72 | 19 | 30.1 | 18.9 | 12000 | 14000 | 0.362 |
7307AC | 46307 | 35 | 80 | 21 | 35.4 | 22 | 10000 | 13000 | 0.475 |
7308AC | 46308 | 40 | 90 | 23 | 43.2 | 27.4 | 9200 | 12000 | 0.657 |
7309AC | 46309 | 45 | 100 | 25 | 55.1 | 37.1 | 8200 | 10000 | 0.875 |
7310AC | 46310 | 50 | 170 | 27 | 70.1 | 48.7 | 7300 | 9100 | 1.14 |
7311AC | 46311 | 55 | 120 | 29 | 80.9 | 56.5 | 6700 | 8400 | 1.45 |
7312AC | 46312 | 60 | 130 | 31 | 92.5 | 65.6 | 6200 | 7700 | 1.81 |
7313AC | 46313 | 65 | 140 | 33 | 105 | 75.3 | 5800 | 7200 | 2.22 |
7314AC | 46314 | 70 | 150 | 35 | 118 | 85.8 | 5400 | 6700 | 2.7 |
7315AC | 46315 | 75 | 160 | 37 | 128 | 97 | 5000 | 6300 | 3.15 |
7316AC | 46316 | 80 | 170 | 39 | 139 | 109 | 4700 | 5900 | 3.85 |
7317AC | 46317 | 85 | 180 | 41 | 150 | 122 | 4400 | 5500 | 4.53 |
7318AC | 46318 | 90 | 190 | 43 | 161 | 135 | 4200 | 5200 | 5 |
7319AC | 46319 | 95 | 200 | 45 | 172 | 149 | 4000 | 4900 | 6.12 |
7320AC | 46320 | 100 | 215 | 47 | 184 | 161 | 3600 | 4600 | 7.53 |
7321AC | 46321 | 105 | 225 | 49 | 208 | 193 | 3500 | 4400 | 8.62 |
7322AC | 46322 | 110 | 240 | 50 | 232 | 226 | 3200 | 4000 | 10.7 |
7324AC | 46324 | 120 | 260 | 55 | 246 | 252 | 3000 | 3700 | 12.6 |
7326AC | 46326 | 130 | 280 | 58 | 301 | 329 | 2700 | 3400 | 15.4 |
7328AC | 46328 | 140 | 300 | 62 | 329 | 374 | 2500 | 3200 | 18.8 |
7330AC | 46330 | 150 | 320 | 65 | 348 | 414 | 2300 | 2900 | 22.4 |
7332AC | 46332 | 160 | 340 | 68 | 365 | 455 | 2200 | 2700 | 26.4 |
7334AC | 46334 | 170 | 360 | 72 | 389 | 485 | 2000 | 2500 | 31.2 |
7336AC | 46336 | 180 | 380 | 75 | 409 | 534 | 1900 | 2400 | 40 |
7338AC | 46338 | 190 | 400 | 78 | 450 | 598 | 1800 | 2200 | 45.5 |
7340AC | 46340 | 200 | 420 | 80 | 474 | 658 | 1700 | 2100 | 52 |
7406AC | 46406 | 30 | 90 | 23 | 0.960 | ||||
7407AC | 46407 | 35 | 100 | 25 | 1.140 | ||||
7408AC | 46408 | 40 | 110 | 27 | 1.400 | ||||
7409AC | 46409 | 45 | 120 | 29 | 1.800 | ||||
7410AC | 46410 | 50 | 130 | 31 | 2.250 | ||||
7411AC | 46411 | 55 | 140 | 33 | 2.750 | ||||
7412AC | 46412 | 60 | 150 | 35 | 3.400 | ||||
7413AC | 46413 | 65 | 160 | 37 | 4.200 | ||||
7414AC | 46414 | 70 | 180 | 42 | 5.800 | ||||
7415AC | 46415 | 75 | 190 | 45 | 7.000 | ||||
7416AC | 46416 | 80 | 200 | 48 | 8.000 |
Bearing type | Boundary Dimensions(mm) | Load Rating (kn) |
Speed Rating(ipm) | Weight | |||||
New Model | Old Model | d | D | B | Dymamic Cr | Static Cor | Grease lubrication |
Oil lubrication |
Weight (kg) |
7204BTN | 66204 | 20 | 47 | 14 | 14.5 | 8.4 | 17000 | 22000 | 0.112 |
7205BTN | 66205 | 25 | 52 | 15 | 15.3 | 9.5 | 15000 | 19000 | 0.135 |
7206BTN | 66206 | 30 | 62 | 16 | 21.3 | 13.7 | 13000 | 16000 | 0.208 |
7207BTN | 66207 | 35 | 72 | 17 | 28.1 | 18.9 | 11000 | 14000 | 0.295 |
7208BTN | 66208 | 40 | 80 | 18 | 33.6 | 23.3 | 10000 | 12000 | 0.382 |
7209BTN | 66209 | 45 | 85 | 19 | 37.7 | 27 | 9400 | 12000 | 0.43 |
7210BTN | 66210 | 50 | 90 | 20 | 39.4 | 41.3 | 8500 | 11000 | 0.485 |
7211BTN | 66211 | 55 | 100 | 21 | 48.7 | 37.1 | 7600 | 9500 | 0.635 |
7212BTN | 66212 | 60 | 110 | 22 | 58.9 | 45.7 | 6900 | 8600 | 0.82 |
7213BTN | 66213 | 65 | 120 | 23 | 67.3 | 54.2 | 6400 | 8000 | 1.02 |
7214BTN | 66214 | 70 | 125 | 24 | 69.8 | 55.6 | 6100 | 7600 | 1.12 |
7215BTN | 66215 | 75 | 130 | 25 | 79.2 | 65.2 | 5800 | 7200 | 1.23 |
7216BTN | 66216 | 80 | 140 | 36 | 85.3 | 71.5 | 5400 | 6700 | 1.5 |
7217BTN | 66217 | 85 | 150 | 28 | 98.6 | 83.6 | 5000 | 6300 | 1.87 |
7218BTN | 66218 | 90 | 160 | 30 | 113 | 96.7 | 4700 | 5900 | 2.3 |
7219BTN | 66219 | 95 | 170 | 32 | 122 | 103 | 4400 | 5500 | 2.78 |
7220BTN | 66220 | 100 | 180 | 34 | 137 | 117 | 4700 | 5200 | 3.32 |
7221BTN | 66221 | 105 | 190 | 36 | 149 | 132 | 3900 | 4900 | 3.95 |
7222BTN | 66222 | 110 | 200 | 38 | 162 | 148 | 3700 | 4600 | 4.65 |
7224BTN | 66224 | 120 | 215 | 40 | 174 | 166 | 3400 | 4300 | 5.49 |
7226BTN | 66226 | 130 | 230 | 40 | 196 | 198 | 3200 | 4000 | 6.21 |
7228BTN | 66228 | 140 | 250 | 42 | 218 | 234 | 2900 | 3600 | 7.76 |
Bearing type | Boundary Dimensions(mm) | Load Rating | Speed Rating(ipm) | Weight | |||||
(kn) | |||||||||
New Model | Old Model | d | D | B | Dymamic Cr | Static Cor | Grease | Oil | Weight |
lubrication | lubrication | (kg) | |||||||
7303BTN | 66303 | 17 | 47 | 14 | 14.9 | 7.9 | 18000 | 23000 | 0.12 |
7304BTN | 66304 | 20 | 52 | 15 | 17.4 | 9.4 | 17000 | 21000 | 0.15 |
7305BTN | 66305 | 25 | 62 | 17 | 24.8 | 14.4 | 14000 | 77000 | 0.243 |
7306BTN | 66306 | 30 | 72 | 19 | 30.1 | 19 | 12000 | 14000 | 0.362 |
7307BTN | 66307 | 35 | 80 | 21 | 35.4 | 22 | 10000 | 13000 | 0.475 |
7308BTN | 66308 | 40 | 90 | 23 | 43.2 | 27.4 | 9200 | 12000 | 0.657 |
7309BTN | 66309 | 45 | 100 | 25 | 55.1 | 37.1 | 8200 | 10000 | 0.875 |
7310BTN | 66310 | 50 | 110 | 27 | 70.1 | 48.1 | 7300 | 9100 | 1.14 |
7311BTN | 66311 | 55 | 120 | 29 | 80.9 | 56.5 | 6700 | 8400 | 1.45 |
7312BTN | 66312 | 60 | 130 | 31 | 92.5 | 65.6 | 6200 | 7700 | 1.81 |
7313BTN | 66313 | 65 | 140 | 33 | 105 | 75.3 | 5800 | 7200 | 2.22 |
7314BTN | 66314 | 70 | 150 | 35 | 118 | 85.8 | 5400 | 6700 | 2.7 |
7315BTN | 66315 | 75 | 160 | 37 | 128 | 97 | 5000 | 6300 | 3.15 |
7316BTN | 66316 | 80 | 170 | 39 | 139 | 109 | 4700 | 5900 | 3.85 |
7317BTN | 66317 | 85 | 180 | 41 | 150 | 122 | 4400 | 5500 | 4.53 |
7318BTN | 66318 | 90 | 190 | 43 | 161 | 135 | 4200 | 5200 | 5.3 |
7319BTN | 66319 | 95 | 200 | 45 | 172 | 149 | 4000 | 4900 | 6.12 |
7320BTN | 66320 | 100 | 215 | 47 | 184 | 161 | 3600 | 4600 | 7.53 |
7321BTN | 66321 | 105 | 225 | 49 | 208 | 193 | 3500 | 4400 | 8.62 |
7322BTN | 66322 | 110 | 240 | 50 | 232 | 226 | 3200 | 4000 | 10.1 |
7324BTN | 66324 | 120 | 260 | 55 | 246 | 252 | 3000 | 3700 | 12.6 |
Packaging & Shipping
Please contact us for more pictures of different packing.
Universal Packing |
Without any logo on bearings or packing. |
JDZ Packing |
With our brand JDZ on bearings and packing. |
Customized Packing |
Depends on buyer’s requirements. |
Original Brand Packing |
Bearing and packing are both original. Please contact us for pictures. |
QUALITY ASSURANCE
100% Quality inspection to ensure the bearings are with good quality before shipping.
Company Profile
ZheJiang CZPT Precision Bearing Co.,Ltd. was founded by ZheJiang Defa Bearing Co.,Ltd, factory is located in ZheJiang province, China.
We are a bearing manufacturer integrating the research, development and sales of bearings, with a floor area of 18,000 square meters and a plant area of 8,800 square meters. Equipped with modern production equipment and advanced detection instruments.
We can provide all types bearings and OEM service according to customers’ requirements.
Our products are widely used in the automobile, agricultural, textile production, mining, printing and packing industries, in addition to various applications at airports, in air-conditioning systems, conveying devices, ships ad so on. Our products are being exported to more than 50 countries and regions overseas including Singapore, Thailand, Iran, Turkey, Poland, Italy, England, France, Russia, Germany, the United States, Australia, Argentina, Brazil as well as other countries and regions all over the world.
We are a trusted and reliable bearing supplier, choose us to be your good partner!
Our Advantages:
1. Professional production team with advanced production equipment and testing instruments.
2. Many years of export experience can provide customers with better service and problem-solving capabilities.
3. Customers all over the world enable us to better understand the market and provide customers with suitable bearings.
4. Sincerity, cooperation, mutual and provide good quality bearings for clients are the development idea of our company
5. Quick delivery, shipping goods on time. Save more time and cost for all customers.
FAQ
1. Q: Are you trading company or manufacturer ?
A: We have our own factory , our type is factory + trade.
2. Q: Could you accept OEM and customize?
A: Yes, we can customize products according to your sample or drawing.
3. Q: How long is your delivery time?
A: If stock, within 7 days to ship or based on your order quantity.
4. Q: Could you supply sample for free?
A: Yes, we can offer the sample for free,do you mind to buy a “ticket” for her?
More details, please contact with us. Thanks for your time!
/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
Contact Angle: | 25° |
---|---|
Aligning: | Non-Aligning Bearing |
Separated: | Unseparated |
Rows Number: | Single |
Load Direction: | Radial Bearing |
Material: | Gcr15 Chrome Steel |
Samples: |
US$ 0/Piece
1 Piece(Min.Order) | |
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Customization: |
Available
| Customized Request |
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How does Preload Affect the Performance and Efficiency of Ball Bearings?
Preload is a crucial factor in ball bearing design that significantly impacts the performance, efficiency, and overall behavior of the bearings in various applications. Preload refers to the intentional axial force applied to the bearing’s rolling elements before it is mounted. This force eliminates internal clearance and creates contact between the rolling elements and the raceways. Here’s how preload affects ball bearing performance:
- Reduction of Internal Clearance:
Applying preload reduces the internal clearance between the rolling elements and the raceways. This eliminates play within the bearing, ensuring that the rolling elements are in constant contact with the raceways. This reduced internal clearance enhances precision and reduces vibrations during operation.
- Increased Stiffness:
Preloaded bearings are stiffer due to the elimination of internal clearance. This increased stiffness improves the bearing’s ability to handle axial and radial loads with higher accuracy and minimal deflection.
- Minimized Axial Play:
Preload minimizes or eliminates axial play within the bearing. This is especially important in applications where axial movement needs to be minimized, such as machine tool spindles and precision instruments.
- Enhanced Rigidity:
The stiffness resulting from preload enhances the bearing’s rigidity, making it less susceptible to deformation under load. This is critical for maintaining precision and accuracy in applications that require minimal deflection.
- Reduction in Ball Slippage:
Preload reduces the likelihood of ball slippage within the bearing, ensuring consistent contact between the rolling elements and the raceways. This leads to improved efficiency and better load distribution.
- Improved Running Accuracy:
Preloading enhances the running accuracy of the bearing, ensuring that it maintains precise rotational characteristics even under varying loads and speeds. This is essential for applications requiring high accuracy and repeatability.
- Optimized Performance at High Speeds:
Preload helps prevent skidding and slipping of the rolling elements during high-speed operation. This ensures that the bearing remains stable, reducing the risk of noise, vibration, and premature wear.
- Impact on Friction and Heat Generation:
While preload reduces internal clearance and friction, excessive preload can lead to higher friction and increased heat generation. A balance must be struck between optimal preload and minimizing friction-related issues.
- Application-Specific Considerations:
The appropriate amount of preload depends on the application’s requirements, such as load, speed, accuracy, and operating conditions. Over-preloading can lead to increased stress and premature bearing failure, while under-preloading may result in inadequate rigidity and reduced performance.
Overall, preload plays a critical role in optimizing the performance, accuracy, and efficiency of ball bearings. Engineers must carefully determine the right preload level for their specific applications to achieve the desired performance characteristics and avoid potential issues related to overloading or inadequate rigidity.
What Role do Seals and Shields Play in Protecting Ball Bearings from Dirt and Debris?
Seals and shields are critical components of ball bearings that play a crucial role in protecting them from dirt, debris, moisture, and contaminants in various applications. These protective features help maintain the integrity of the bearing’s internal components and ensure reliable operation. Here’s how seals and shields contribute to bearing protection:
- Contaminant Exclusion:
Seals and shields create a physical barrier between the external environment and the bearing’s interior. They prevent dust, dirt, water, and other contaminants from entering the bearing and coming into contact with the rolling elements and raceways.
- Lubrication Retention:
Seals and shields help retain lubrication within the bearing. They prevent the lubricant from escaping and contaminants from entering, ensuring that the bearing remains properly lubricated for smooth operation and reduced friction.
- Corrosion Prevention:
Seals and shields protect bearing components from exposure to moisture and corrosive substances. By preventing moisture ingress, they help extend the bearing’s lifespan by minimizing the risk of corrosion-related damage.
- Extended Bearing Life:
Seals and shields contribute to the overall longevity of the bearing by reducing wear and damage caused by contaminants. They help maintain a clean internal environment, which promotes proper rolling contact and minimizes the risk of premature failure.
- Enhanced Performance in Harsh Environments:
In applications exposed to harsh conditions, such as outdoor machinery or industrial settings, seals and shields are vital. They protect bearings from abrasive particles, chemicals, and extreme temperatures, ensuring reliable performance despite challenging conditions.
- Noise and Vibration Reduction:
Seals and shields can help reduce noise and vibration generated by the bearing. They provide additional damping and stability, contributing to smoother operation and enhanced user comfort in noise-sensitive applications.
- Customized Protection:
Manufacturers offer a variety of seal and shield designs to suit different application requirements. Some seals provide higher levels of protection against contamination, while others are designed for high-speed or high-temperature environments.
- Trade-Offs:
While seals and shields offer significant benefits, they can also introduce some friction due to contact with the bearing’s inner or outer ring. Engineers must balance the level of protection with the desired operating characteristics, considering factors like friction, speed, and environmental conditions.
Overall, seals and shields play a vital role in maintaining the integrity and performance of ball bearings. By effectively preventing contaminants from entering and preserving lubrication, they ensure the smooth and reliable operation of machinery and equipment in a wide range of applications.
How does Lubrication Impact the Performance and Lifespan of Ball Bearings?
Lubrication plays a critical role in the performance and lifespan of ball bearings. Proper lubrication ensures smooth operation, reduces friction, minimizes wear, and prevents premature failure. Here’s how lubrication impacts ball bearings:
- Friction Reduction:
Lubrication creates a thin film between the rolling elements (balls) and the raceways of the bearing. This film reduces friction by separating the surfaces and preventing direct metal-to-metal contact. Reduced friction results in lower energy consumption, heat generation, and wear.
- Wear Prevention:
Lubricants create a protective barrier that prevents wear and damage to the bearing’s components. Without proper lubrication, the repeated rolling and sliding of the balls against the raceways would lead to accelerated wear, surface pitting, and eventual failure.
- Heat Dissipation:
Lubricants help dissipate heat generated during operation. The rolling elements and raceways can generate heat due to friction. Adequate lubrication carries away this heat, preventing overheating and maintaining stable operating temperatures.
- Corrosion Resistance:
Lubrication prevents moisture and contaminants from coming into direct contact with the bearing’s surfaces. This helps protect the bearing against corrosion, rust, and the formation of debris that can compromise its performance and longevity.
- Noise Reduction:
Lubricated ball bearings operate quietly because the lubricant cushions and dampens vibrations caused by the rolling motion. This noise reduction is crucial in applications where noise levels need to be minimized.
- Seal Protection:
Lubricants help maintain the effectiveness of seals or shields that protect the bearing from contaminants. They create a barrier that prevents particles from entering the bearing and causing damage.
- Improved Efficiency:
Properly lubricated ball bearings operate with reduced friction, leading to improved overall efficiency. This is especially important in applications where energy efficiency is a priority.
- Lifespan Extension:
Effective lubrication significantly extends the lifespan of ball bearings. Bearings that are properly lubricated experience less wear, reduced fatigue, and a lower likelihood of premature failure.
- Selection of Lubricant:
Choosing the right lubricant is essential. Factors such as speed, temperature, load, and environmental conditions influence the choice of lubricant type and viscosity. Some common lubricant options include grease and oil-based lubricants.
- Regular Maintenance:
Regular lubrication maintenance is crucial to ensure optimal bearing performance. Bearings should be inspected and relubricated according to manufacturer recommendations and based on the application’s operating conditions.
In summary, proper lubrication is essential for the optimal performance, longevity, and reliability of ball bearings. It reduces friction, prevents wear, dissipates heat, protects against corrosion, and contributes to smooth and efficient operation in various industrial and mechanical applications.
editor by CX 2024-05-02