SWBTEC
Excavator slewing ring bearing wholesale
This excavator slewing ring bearing is made of 42CrMo forged steel. After integrated induction hardening treatment, the raceway hardness reaches 55-62 HRC, the effective hardening layer depth exceeds 3mm, it can withstand the axial force and overturning moment of the excavator under high load conditions, and the design service life exceeds 6000 working hours.
MOQ: 1 pcs
Need drawings or samples that are compatible with a specific excavator model? Contact us！
Rate: ★★★★ 4.0 Rated by customer‘s email.
42CrMo4 Forged Steel
Material
55 – 62 HRC
Raceway Hardness
ISO 7-8 standards
Gear Precision
Excavator slewing ring bearing Features & Application
42CrMo4 forgings treated: 42CrMo4 forgings treated by vacuum degassing, compared with ordinary 50Mn steel, its tensile strength is increased by 20%, even in mining operations and other scenarios, can also prevent support fracture.
3mm to 5mm hardened layer depth: the raceway adopts numerical control induction hardening technology, and the hardening layer depth is controlled between 3mm and 5mm. This process reduces the early wear rate by 65%.
Gear anti fatigue design: In view of the frequent rotary braking of the excavator, we carry out the full tooth profile quenching treatment on the root of the gear to completely solve the problem of broken teeth.
Micron grinding accuracy: All mounting surfaces and raceways are ground with high precision, and the flatness tolerance is controlled within 0.05mm, ensuring a perfect fit with the upper frame and chassis and reducing slewing.
Extreme environment resistant: equipped with aging-resistant NBR (nitrile rubber) or FKM (fluorine rubber) sealing strips, temperature range -40°C to +100°C. Protects the internal raceways and steel balls.
100% NDT: Before leaving the factory, each slewing bearing is tested for surface cracks by magnetic particle inspection (MPI) and internal forging defects by ultrasonic inspection (UT) to ensure zero defect delivery.
Solve the “abnormal sound and jam in rotation”
Technical solutions
In heavy earthmoving operations, jamming caused by raceway deformation is a common fault. Our excavator slewing bearing adopts the four-point contact ball structure optimization design, and implements the “negative clearance” pre-tightening treatment in the processing process. This not only eliminates backlash due to long-term use, but also reduces noise due to vibration by 15dB, ensuring smooth operation.
Seal failure caused by “high dust and muddy environment”
Technical solutions
For mining and swamp excavation operations, ordinary single-lip seals are highly susceptible to grease leakage due to wear. We offer a reinforced 3 lip seal solution with high pressure resistant lithium grease. Field tests show that in an environment with extremely high sand content, the scheme prolongs the replacement cycle of grease by 2 times, and effectively prevents rusting and pitting of the raceway.
Excavator slewing ring bearing Specifications Datasheet
–Based on the corresponding excavator slewing bearing specifications
| Hitachi | Komatsu | ||||
| 1 | EX45 | 35 | ZX250-3 | 64 | PC20HT |
| 2 | ZX55 | 36 | ZX270 | 65 | PC30 |
| 3 | EX60-1 | 37 | ZX270-3 | 66 | PC30-2 |
| 4 | EX60-2/3 | 38 | ZX280-3 | 67 | PC30-7 |
| 5 | EX60-5 | 39 | EX300-1 | 68 | PC30-8 |
| 6 | EX80-5 | 40 | EX300-2/3 | 69 | PC35 |
| 7 | ZX60 | 41 | EX300-5 | 70 | PC40 |
| 8 | ZX60-3 | 42 | ZX330 | 71 | PC40-7 |
| 9 | EX65 | 43 | ZX330-3 | 72 | PC50/55/56 |
| 10 | ZX70 | 44 | EX330-5 | 73 | PW60-1 |
| 11 | ZX80 | 45 | ZX350 | 74 | PC60-5 |
| 12 | EX90 | 46 | EX350-5 | 75 | PC60-6(Z=76) |
| 13 | EX100-1 | 47 | EX370-5 | 76 | PC60-6(Z=80) |
| 14 | EX100-2/3/5 | 48 | ZX350-3 | 77 | PC60-7(Z=76) |
| 15 | EX120-1 | 49 | ZX370 | 78 | PC60-7(Z=80) |
| 16 | EX120-2/3/5 | 50 | EX450 | 79 | PC71 |
| 17 | ZX120 | 51 | ZX450 | 80 | PC70-6 |
| 18 | ZX130 | 52 | EX400-1 | 81 | PC70-7 |
| 19 | ZX135 | 53 | EX400-3 | 82 | PC75U |
| 20 | EX150 | 54 | EX400-5 | 83 | PC78 |
| 21 | ZX160 | 55 | ZX480 | 84 | PC90 |
| 22 | EX200-1/2/3 | 56 | UH045-7 | 85 | PC90-6 |
| 23 | EX200-5 | 57 | UH07-5 | 86 | PC100-3/120-3 |
| 24 | EX210-5 | 58 | UH07-7 | 87 | PC100-5/120-5 |
| 25 | ZX200 | 59 | UH04-1 | 88 | PC100-6 |
| 26 | ZX200-5 | 60 | UH063 | 89 | PC120-6(4D95) |
| 27 | ZX210 | 61 | UH055-7 | 90 | PC120-6(4D102) |
| 28 | ZX200-3 | 91 | PC130-7 | ||
| 29 | ZX210-3 | 92 | PC128U | ||
| 30 | ZX225 | 93 | PC150-5 | ||
| 31 | EX220-1/3/5 | 94 | PC150-7 | ||
| 32 | ZX230 | 95 | PC160-7 | ||
| 33 | ZX240 | 96 | PC190 | ||
| 34 | ZX240-3 | 97 | PC200-1/220-1 | ||
| Komatsu | Kobelco | ||||
| 98 | PC200-2 | 132 | SK60-3 | 166 | SK330-8 |
| 99 | PC200-3/220-3 | 133 | SK03 | 167 | SK350 |
| 100 | PC200-5 | 134 | SK03N2 | 168 | SK350-8 |
| 101 | PC200-6A | 135 | SK04 | 169 | SK14 |
| 102 | PC200-6B | 136 | SK75 | ||
| 103 | PC200-7(Z=92) | 137 | SK100-3/4/5 | ||
| 104 | PC200-7(Z=110) | 138 | SK115 | ||
| 105 | PC200-8 | 139 | SK120-1/2/3/5 | ||
| 106 | PC210-6 | 140 | SK135 | ||
| 107 | PC220-5 | 141 | SK140-8 | ||
| 108 | PC220-6 | 142 | SK045N2 | ||
| 109 | PC220-7 | 143 | SK041 | ||
| 110 | PC220-8 | 144 | SK907B | ||
| 111 | PC228 | 145 | SK07-5 | ||
| 112 | PC240-7 | 146 | SK200-1/2/3/5 | ||
| 113 | PC240-8 | 147 | SK200-6/210-6 | ||
| 114 | PC270-7 | 148 | SK200-8 | ||
| 115 | PC300-2/3 | 149 | SK210-9 | ||
| 116 | PC300-5 | 150 | SK07-1 | ||
| 117 | PC300-6 | 151 | SK07-2(1) | ||
| 118 | PC300-7/8 | 152 | SK07-2(2) | ||
| 119 | PC350-6 | 153 | SK07-1-N2 | ||
| 120 | PC350-7 | 154 | SK07-N2 | ||
| 121 | PC350-8 | 155 | SK210-8 | ||
| 122 | PC360-7 | 156 | SK220-3 | ||
| 123 | PC400 | 157 | SK230-6 | ||
| 124 | PC400-3 | 158 | SK235 | ||
| 125 | PC400-5 | 159 | SK250-8 | ||
| 126 | PC400-6 | 160 | SK260-8 | ||
| 127 | PC400-7/8 | 161 | SK270-4 | ||
| 128 | PC410-5 | 162 | SK300-1 | ||
| 129 | PC450 | 163 | SK300-3 | ||
| 130 | PC450-6 | 164 | SK310 | ||
| 131 | PC450-8 | 165 | SK330-6E | ||
| Caterpillar | Hyundai | ||||
| 170 | E70B | 204 | CAT330C(2) | 210 | R55-5 |
| 171 | E110 | 205 | CAT330D(1) | 211 | R55-7 |
| 172 | E120B | 206 | CAT330D(2) | 212 | R60-5 |
| 173 | E180 | 207 | CAT345B | 213 | R60-7 |
| 174 | E200A | 208 | CAT345C | 214 | R70-7 |
| 175 | E200B | 209 | CAT345D | 215 | R80-7 |
| 176 | E307B | 216 | R80-9 | ||
| 177 | E307C | 217 | R110-7 | ||
| 178 | E307D | 218 | R130-5 | ||
| 179 | E308 | 219 | R130-7 | ||
| 180 | E308C | 220 | R140-7 | ||
| 181 | E312 | 221 | R150-7 | ||
| 182 | CAT215 | 222 | R150-9 | ||
| 183 | CAT215B | 223 | R190-5 | ||
| 184 | CAT225 | 224 | R200 | ||
| 185 | CAT229 | 225 | R200-5 | ||
| 186 | CAT250 | 226 | R205-7 | ||
| 187 | CAT280 | 227 | R210-3 | ||
| 188 | CAT311 | 228 | R210W-7 | ||
| 189 | CAT312 | 229 | R210LC-7 | ||
| 190 | CAT312B | 230 | R210W-9 | ||
| 191 | CAT313D | 231 | R215-7 | ||
| 192 | CAT320 | 232 | R220-5 | ||
| 193 | CAT320B | 233 | R225-7 | ||
| 194 | CAT320C/D | 234 | R245 | ||
| 195 | CAT322C | 235 | R260-5 | ||
| 196 | CAT323 | 236 | R280 | ||
| 197 | CAT325 | 237 | R290 | ||
| 198 | CAT325C | 238 | R300 | ||
| 199 | CAT325D | 239 | R290-3 | ||
| 200 | CAT329D | 240 | R290-7 | ||
| 201 | CAT1090 | 241 | R290-9 | ||
| 202 | CAT1190 | 242 | R300-5 | ||
| 203 | CAT330C(1) | 243 | R300-7 | ||
| Hyundai | Sumitomo | Doosan | |||
| 244 | R305-7 | 252 | SH60 | 287 | DH55-3 |
| 245 | R350-7 | 253 | SH100 | 288 | DH55-5 |
| 246 | R320-7 | 254 | SH120-1 | 289 | DH60-5 |
| 247 | R335-7 | 255 | SH120A1/A2 | 290 | DH60-7 |
| 248 | R360 | 256 | SH120A3 | 291 | DH80 |
| 249 | R375-7 | 257 | SH120C3 | 292 | DH80-7 |
| 250 | R450 | 258 | SH130-5 | 293 | DH80-8 |
| 251 | R455-7 | 259 | SH160 | 294 | DH150-7 |
| 260 | SH200A1/A2 | 295 | DH200-3 | ||
| 261 | SH200A3 | 296 | DH220-2/3 | ||
| 262 | SH200A5 | 297 | DH215-7 | ||
| 263 | SH200C3 | 298 | DH215-9 | ||
| 264 | SH200G3 | 299 | DH220-5 | ||
| 265 | SH210-5 | 300 | DH220-7 | ||
| 266 | SH210A3 | 301 | DH220-9E | ||
| 267 | SH220A1 | 302 | DH225-7 | ||
| 268 | SH220A3 | 303 | DH225-9 | ||
| 269 | SH225 | 304 | DH258-7 | ||
| 270 | SH240-3 | 305 | DH280 | ||
| 271 | SH240-5 | 306 | DH280-3 | ||
| 272 | SH260 | 307 | DH290 | ||
| 273 | SH265 | 308 | DH300 | ||
| 274 | SH280 | 309 | DH300-5 | ||
| 275 | LS2800FJ2 | 310 | DH300-7(1) | ||
| 276 | SH300 | 311 | DH300-7(2) | ||
| 277 | SH300A2 | 312 | DX300LC | ||
| 278 | SH330 | 313 | DH320 | ||
| 279 | SH340 | 314 | DH10L | ||
| 280 | SH350 | 315 | DH360-5 | ||
| 281 | SH350B | 316 | DH370-7 | ||
| 282 | SH400 | 317 | DH370-9 | ||
| 283 | SH430 | 318 | DH420 | ||
| 284 | SH40T | 319 | DH500 | ||
| 285 | SH580 | ||||
| Volvo | Others | ||
| 350 | EC55 | 362 | JS140 old |
| 351 | EC914 | 363 | JS200/210 old |
| 352 | EC140 | 364 | JS235 |
| 353 | EC210 | 365 | JS8056 |
| 354 | EC210B | 366 | PS60 |
| 355 | EC240 | 367 | PS132 |
| 356 | EC240B | 368 | PS210/SE210 |
| 357 | EC290 | 369 | SE210-2 |
| 358 | EC290B | 370 | PS280 |
| 359 | EC330B | 371 | PS292 |
| 360 | EC360 | ||
| 361 | EC360B | ||
Huge OEM database matching:
We have drawing data for more than 3000 mainstream excavator models, covering 90% of the brands. You only need to provide the machine model or part number, we can confirm the size.
More competitive life cycle costs:
By optimizing the process, our slewing bearing reduces the purchase cost by 30%-40% while maintaining the same performance index as the original parts.
Flexible nventory programme:
For 20-ton general-purpose models, we keep stock all year round and can ship within 3-5 days. For non-standard custom orders, delivery time can be up to 25-30 days.
Factory of excavator slewing bearing
Heavy duty cnc turning center
In view of the large diameter (usually 800mm-2500mm) and flat characteristics of the excavator slewing bearing, we are equipped with 10 double-column vertical lathes (VTL) with a processing diameter of 3.5 meters. Compared with horizontal lathes, vertical machining can effectively avoid elliptical deformation caused by self-weight of large-diameter rings and ensure that the roundness error after turning is controlled within 0.02mm.
Quenching production line
We have the medium frequency induction hardening machine tool of Siemens CNC system, which is specially used to deal with complex raceway cross-section and tooth surface. The equipment can accurately control the heating temperature and cooling speed, ensure that the raceway hardening layer reaches 3mm-5mm evenly, and the hardness fluctuation is controlled within the range of ± 2 HRC, which perfectly solves the problem of “rail gnawing” in excavator operation.
Internal gear hobbing machine
Most of the excavator slewing bearing adopts internal tooth structure. We have introduced a professional CNC gear shaper, which is specially used to process high-strength internal gears with modulus 10-22. Through the modification technology, we have optimized the root fillet so that it can withstand the huge impact of the excavator start and emergency stop, and meet the AGMA 10 accuracy standard.
Detailed drawing of excavator slewing bearing
Manufacturing Process
Excavator slewing ring bearing manufacturing
Ring Rolling and Normalizing
We use 42CrMo steel ingots for rolling, ensuring the metal flow lines are distributed circumferentially, increasing the ring’s strength by 30%. Subsequent normalizing eliminates stress.
Raceway and Surface Hardening
Raceway: A double-lip profile sensor is used to enhance raceway hardness. Hardening is performed along the tooth grooves, specifically tailored to the characteristics of excavators.
Negative Clearance Adjustment
By selecting steel balls of different diameters, the slewing bearing is adjusted to a state of slight negative clearance or zero clearance. This step is specifically designed for excavators to eliminate swaying during operation.
Simulated Condition Testing
Before leaving the factory, the product undergoes simulated excavator slewing motion on a test bench to test the starting friction torque. Finally, a double-lip seal is installed and lubricating grease is applied.
Our certificates and FAQs
Totally. Our products are manufactured to strict OEM specifications, including mounting hole locations, gear parameters and load ratings, to ensure 100% interchangeable installation and consistent performance parameters with the original parts.
For regular models, we support 1 piece minimum order. For special customized models that need to be re-opened, MOQ is usually 5 pieces, which can be negotiated.
The surface of the product is coated with anti-rust oil and wrapped with two layers of waterproof film. The exterior is packed in a fumigation-free plywood wooden box with a fixed card slot inside to ensure no displacement or corrosion during shipping.
Yes. Our database covers the vast majority of brands. You only need to provide the excavator brand, model (such as Komatsu PC200-8) and year of production, we can usually match the correct slewing bearing.
Quenching and tempering is the overall heat treatment to improve toughness; quenching is surface hardening to improve wear resistance. For the excavator slewing ring, we usually recommend that the raceway must be induction hardened, and the gear is recommended for tooth surface quenching to cope with high-strength mining impact.
Accepted. We welcome SGS, BV or your designated third-party inspection agency to the factory for size, hardness and flaw detection before shipment.
sales@ngswbtec.com
Phone
+86 5634113031
+86 183-7996-8697
Fax
5634113031
Factory Address
Ningguo Dadao, Ningguo Economic Develope Zone, Ningguo,Xuancheng,Anhui,China
Get a Free Quote Today.
Excavator slewing ring bearing wholesale
This excavator slewing ring bearing is made of 42CrMo forged steel. After integrated induction hardening treatment, the raceway hardness reaches 55-62 HRC, the effective hardening layer depth exceeds 3mm, it can withstand the axial force and overturning moment of the excavator under high load conditions, and the design service life exceeds 6000 working hours.
42CrMo4 Forged Steel
Material
55 – 62 HRC
Raceway Hardness
ISO 7-8 standards
Gear Precision
Rate: ★★★★ 4.0 Rated by customer‘s email.
MOQ: 1 pcs
Excavator slewing ring bearing Features & Application
42CrMo4 forgings treated: 42CrMo4 forgings treated by vacuum degassing, compared with ordinary 50Mn steel, its tensile strength is increased by 20%, even in mining operations and other scenarios, can also prevent support fracture.
3mm to 5mm hardened layer depth: the raceway adopts numerical control induction hardening technology, and the hardening layer depth is controlled between 3mm and 5mm. This process reduces the early wear rate by 65%.
Gear anti fatigue design: In view of the frequent rotary braking of the excavator, we carry out the full tooth profile quenching treatment on the root of the gear to completely solve the problem of broken teeth.
Micron grinding accuracy: All mounting surfaces and raceways are ground with high precision, and the flatness tolerance is controlled within 0.05mm, ensuring a perfect fit with the upper frame and chassis and reducing slewing.
Extreme environment resistant: equipped with aging-resistant NBR (nitrile rubber) or FKM (fluorine rubber) sealing strips, temperature range -40°C to +100°C. Protects the internal raceways and steel balls.
100% NDT: Before leaving the factory, each slewing bearing is tested for surface cracks by magnetic particle inspection (MPI) and internal forging defects by ultrasonic inspection (UT) to ensure zero defect delivery.
Solve the “abnormal sound and jam in rotation”
Technical solutions
In heavy earthmoving operations, jamming caused by raceway deformation is a common fault. Our excavator slewing bearing adopts the four-point contact ball structure optimization design, and implements the “negative clearance” pre-tightening treatment in the processing process. This not only eliminates backlash due to long-term use, but also reduces noise due to vibration by 15dB, ensuring smooth operation.
Seal failure caused by “high dust and muddy environment”
Technical solutions
For mining and swamp excavation operations, ordinary single-lip seals are highly susceptible to grease leakage due to wear. We offer a reinforced 3 lip seal solution with high pressure resistant lithium grease. Field tests show that in an environment with extremely high sand content, the scheme prolongs the replacement cycle of grease by 2 times, and effectively prevents rusting and pitting of the raceway.
Excavator slewing ring bearing Specifications Datasheet
–Based on the corresponding excavator slewing bearing specifications
| Hitachi | Komatsu | ||||
| 1 | EX45 | 35 | ZX250-3 | 64 | PC20HT |
| 2 | ZX55 | 36 | ZX270 | 65 | PC30 |
| 3 | EX60-1 | 37 | ZX270-3 | 66 | PC30-2 |
| 4 | EX60-2/3 | 38 | ZX280-3 | 67 | PC30-7 |
| 5 | EX60-5 | 39 | EX300-1 | 68 | PC30-8 |
| 6 | EX80-5 | 40 | EX300-2/3 | 69 | PC35 |
| 7 | ZX60 | 41 | EX300-5 | 70 | PC40 |
| 8 | ZX60-3 | 42 | ZX330 | 71 | PC40-7 |
| 9 | EX65 | 43 | ZX330-3 | 72 | PC50/55/56 |
| 10 | ZX70 | 44 | EX330-5 | 73 | PW60-1 |
| 11 | ZX80 | 45 | ZX350 | 74 | PC60-5 |
| 12 | EX90 | 46 | EX350-5 | 75 | PC60-6(Z=76) |
| 13 | EX100-1 | 47 | EX370-5 | 76 | PC60-6(Z=80) |
| 14 | EX100-2/3/5 | 48 | ZX350-3 | 77 | PC60-7(Z=76) |
| 15 | EX120-1 | 49 | ZX370 | 78 | PC60-7(Z=80) |
| 16 | EX120-2/3/5 | 50 | EX450 | 79 | PC71 |
| 17 | ZX120 | 51 | ZX450 | 80 | PC70-6 |
| 18 | ZX130 | 52 | EX400-1 | 81 | PC70-7 |
| 19 | ZX135 | 53 | EX400-3 | 82 | PC75U |
| 20 | EX150 | 54 | EX400-5 | 83 | PC78 |
| 21 | ZX160 | 55 | ZX480 | 84 | PC90 |
| 22 | EX200-1/2/3 | 56 | UH045-7 | 85 | PC90-6 |
| 23 | EX200-5 | 57 | UH07-5 | 86 | PC100-3/120-3 |
| 24 | EX210-5 | 58 | UH07-7 | 87 | PC100-5/120-5 |
| 25 | ZX200 | 59 | UH04-1 | 88 | PC100-6 |
| 26 | ZX200-5 | 60 | UH063 | 89 | PC120-6(4D95) |
| 27 | ZX210 | 61 | UH055-7 | 90 | PC120-6(4D102) |
| 28 | ZX200-3 | 91 | PC130-7 | ||
| 29 | ZX210-3 | 92 | PC128U | ||
| 30 | ZX225 | 93 | PC150-5 | ||
| 31 | EX220-1/3/5 | 94 | PC150-7 | ||
| 32 | ZX230 | 95 | PC160-7 | ||
| 33 | ZX240 | 96 | PC190 | ||
| 34 | ZX240-3 | 97 | PC200-1/220-1 | ||
| Komatsu | Kobelco | ||||
| 98 | PC200-2 | 132 | SK60-3 | 166 | SK330-8 |
| 99 | PC200-3/220-3 | 133 | SK03 | 167 | SK350 |
| 100 | PC200-5 | 134 | SK03N2 | 168 | SK350-8 |
| 101 | PC200-6A | 135 | SK04 | 169 | SK14 |
| 102 | PC200-6B | 136 | SK75 | ||
| 103 | PC200-7(Z=92) | 137 | SK100-3/4/5 | ||
| 104 | PC200-7(Z=110) | 138 | SK115 | ||
| 105 | PC200-8 | 139 | SK120-1/2/3/5 | ||
| 106 | PC210-6 | 140 | SK135 | ||
| 107 | PC220-5 | 141 | SK140-8 | ||
| 108 | PC220-6 | 142 | SK045N2 | ||
| 109 | PC220-7 | 143 | SK041 | ||
| 110 | PC220-8 | 144 | SK907B | ||
| 111 | PC228 | 145 | SK07-5 | ||
| 112 | PC240-7 | 146 | SK200-1/2/3/5 | ||
| 113 | PC240-8 | 147 | SK200-6/210-6 | ||
| 114 | PC270-7 | 148 | SK200-8 | ||
| 115 | PC300-2/3 | 149 | SK210-9 | ||
| 116 | PC300-5 | 150 | SK07-1 | ||
| 117 | PC300-6 | 151 | SK07-2(1) | ||
| 118 | PC300-7/8 | 152 | SK07-2(2) | ||
| 119 | PC350-6 | 153 | SK07-1-N2 | ||
| 120 | PC350-7 | 154 | SK07-N2 | ||
| 121 | PC350-8 | 155 | SK210-8 | ||
| 122 | PC360-7 | 156 | SK220-3 | ||
| 123 | PC400 | 157 | SK230-6 | ||
| 124 | PC400-3 | 158 | SK235 | ||
| 125 | PC400-5 | 159 | SK250-8 | ||
| 126 | PC400-6 | 160 | SK260-8 | ||
| 127 | PC400-7/8 | 161 | SK270-4 | ||
| 128 | PC410-5 | 162 | SK300-1 | ||
| 129 | PC450 | 163 | SK300-3 | ||
| 130 | PC450-6 | 164 | SK310 | ||
| 131 | PC450-8 | 165 | SK330-6E | ||
| Caterpillar | Hyundai | ||||
| 170 | E70B | 204 | CAT330C(2) | 210 | R55-5 |
| 171 | E110 | 205 | CAT330D(1) | 211 | R55-7 |
| 172 | E120B | 206 | CAT330D(2) | 212 | R60-5 |
| 173 | E180 | 207 | CAT345B | 213 | R60-7 |
| 174 | E200A | 208 | CAT345C | 214 | R70-7 |
| 175 | E200B | 209 | CAT345D | 215 | R80-7 |
| 176 | E307B | 216 | R80-9 | ||
| 177 | E307C | 217 | R110-7 | ||
| 178 | E307D | 218 | R130-5 | ||
| 179 | E308 | 219 | R130-7 | ||
| 180 | E308C | 220 | R140-7 | ||
| 181 | E312 | 221 | R150-7 | ||
| 182 | CAT215 | 222 | R150-9 | ||
| 183 | CAT215B | 223 | R190-5 | ||
| 184 | CAT225 | 224 | R200 | ||
| 185 | CAT229 | 225 | R200-5 | ||
| 186 | CAT250 | 226 | R205-7 | ||
| 187 | CAT280 | 227 | R210-3 | ||
| 188 | CAT311 | 228 | R210W-7 | ||
| 189 | CAT312 | 229 | R210LC-7 | ||
| 190 | CAT312B | 230 | R210W-9 | ||
| 191 | CAT313D | 231 | R215-7 | ||
| 192 | CAT320 | 232 | R220-5 | ||
| 193 | CAT320B | 233 | R225-7 | ||
| 194 | CAT320C/D | 234 | R245 | ||
| 195 | CAT322C | 235 | R260-5 | ||
| 196 | CAT323 | 236 | R280 | ||
| 197 | CAT325 | 237 | R290 | ||
| 198 | CAT325C | 238 | R300 | ||
| 199 | CAT325D | 239 | R290-3 | ||
| 200 | CAT329D | 240 | R290-7 | ||
| 201 | CAT1090 | 241 | R290-9 | ||
| 202 | CAT1190 | 242 | R300-5 | ||
| 203 | CAT330C(1) | 243 | R300-7 | ||
| Hyundai | Sumitomo | Doosan | |||
| 244 | R305-7 | 252 | SH60 | 287 | DH55-3 |
| 245 | R350-7 | 253 | SH100 | 288 | DH55-5 |
| 246 | R320-7 | 254 | SH120-1 | 289 | DH60-5 |
| 247 | R335-7 | 255 | SH120A1/A2 | 290 | DH60-7 |
| 248 | R360 | 256 | SH120A3 | 291 | DH80 |
| 249 | R375-7 | 257 | SH120C3 | 292 | DH80-7 |
| 250 | R450 | 258 | SH130-5 | 293 | DH80-8 |
| 251 | R455-7 | 259 | SH160 | 294 | DH150-7 |
| 260 | SH200A1/A2 | 295 | DH200-3 | ||
| 261 | SH200A3 | 296 | DH220-2/3 | ||
| 262 | SH200A5 | 297 | DH215-7 | ||
| 263 | SH200C3 | 298 | DH215-9 | ||
| 264 | SH200G3 | 299 | DH220-5 | ||
| 265 | SH210-5 | 300 | DH220-7 | ||
| 266 | SH210A3 | 301 | DH220-9E | ||
| 267 | SH220A1 | 302 | DH225-7 | ||
| 268 | SH220A3 | 303 | DH225-9 | ||
| 269 | SH225 | 304 | DH258-7 | ||
| 270 | SH240-3 | 305 | DH280 | ||
| 271 | SH240-5 | 306 | DH280-3 | ||
| 272 | SH260 | 307 | DH290 | ||
| 273 | SH265 | 308 | DH300 | ||
| 274 | SH280 | 309 | DH300-5 | ||
| 275 | LS2800FJ2 | 310 | DH300-7(1) | ||
| 276 | SH300 | 311 | DH300-7(2) | ||
| 277 | SH300A2 | 312 | DX300LC | ||
| 278 | SH330 | 313 | DH320 | ||
| 279 | SH340 | 314 | DH10L | ||
| 280 | SH350 | 315 | DH360-5 | ||
| 281 | SH350B | 316 | DH370-7 | ||
| 282 | SH400 | 317 | DH370-9 | ||
| 283 | SH430 | 318 | DH420 | ||
| 284 | SH40T | 319 | DH500 | ||
| 285 | SH580 | ||||
| Volvo | Others | ||
| 350 | EC55 | 362 | JS140 old |
| 351 | EC914 | 363 | JS200/210 old |
| 352 | EC140 | 364 | JS235 |
| 353 | EC210 | 365 | JS8056 |
| 354 | EC210B | 366 | PS60 |
| 355 | EC240 | 367 | PS132 |
| 356 | EC240B | 368 | PS210/SE210 |
| 357 | EC290 | 369 | SE210-2 |
| 358 | EC290B | 370 | PS280 |
| 359 | EC330B | 371 | PS292 |
| 360 | EC360 | ||
| 361 | EC360B | ||
Huge OEM database matching:
We have drawing data for more than 3000 mainstream excavator models, covering 90% of the brands. You only need to provide the machine model or part number, we can confirm the size.
More competitive life cycle costs:
By optimizing the process, our slewing bearing reduces the purchase cost by 30%-40% while maintaining the same performance index as the original parts.
Flexible nventory programme:
For 20-ton general-purpose models, we keep stock all year round and can ship within 3-5 days. For non-standard custom orders, delivery time can be up to 25-30 days.
Factory of excavator slewing bearing
Heavy duty cnc turning center
In view of the large diameter (usually 800mm-2500mm) and flat characteristics of the excavator slewing bearing, we are equipped with 10 double-column vertical lathes (VTL) with a processing diameter of 3.5 meters. Compared with horizontal lathes, vertical machining can effectively avoid elliptical deformation caused by self-weight of large-diameter rings and ensure that the roundness error after turning is controlled within 0.02mm.
Quenching production line
We have the medium frequency induction hardening machine tool of Siemens CNC system, which is specially used to deal with complex raceway cross-section and tooth surface. The equipment can accurately control the heating temperature and cooling speed, ensure that the raceway hardening layer reaches 3mm-5mm evenly, and the hardness fluctuation is controlled within the range of ± 2 HRC, which perfectly solves the problem of “rail gnawing” in excavator operation.
Internal gear hobbing machine
Most of the excavator slewing bearing adopts internal tooth structure. We have introduced a professional CNC gear shaper, which is specially used to process high-strength internal gears with modulus 10-22. Through the modification technology, we have optimized the root fillet so that it can withstand the huge impact of the excavator start and emergency stop, and meet the AGMA 10 accuracy standard.
Detailed drawing of excavator slewing bearing
Manufacturing Process
Excavator slewing ring bearing manufacturing
Ring Rolling and Normalizing
We use 42CrMo steel ingots for rolling, ensuring the metal flow lines are distributed circumferentially, increasing the ring’s strength by 30%. Subsequent normalizing eliminates stress.
Raceway and Surface Hardening
Raceway: A double-lip profile sensor is used to enhance raceway hardness. Hardening is performed along the tooth grooves, specifically tailored to the characteristics of excavators.
Negative Clearance Adjustment
By selecting steel balls of different diameters, the slewing bearing is adjusted to a state of slight negative clearance or zero clearance. This step is specifically designed for excavators to eliminate swaying during operation.
Simulated Condition Testing
Before leaving the factory, the product undergoes simulated excavator slewing motion on a test bench to test the starting friction torque. Finally, a double-lip seal is installed and lubricating grease is applied.
Our certificates and FAQs
The factory has passed ISO 9001:2015 quality management system certification and CE certification.
Totally. Our products are manufactured to strict OEM specifications, including mounting hole locations, gear parameters and load ratings, to ensure 100% interchangeable installation and consistent performance parameters with the original parts.
For regular models, we support 1 piece minimum order. For special customized models that need to be re-opened, MOQ is usually 5 pieces, which can be negotiated.
The surface of the product is coated with anti-rust oil and wrapped with two layers of waterproof film. The exterior is packed in a fumigation-free plywood wooden box with a fixed card slot inside to ensure no displacement or corrosion during shipping.
Yes. Our database covers the vast majority of brands. You only need to provide the excavator brand, model (such as Komatsu PC200-8) and year of production, we can usually match the correct slewing bearing.
Quenching and tempering is the overall heat treatment to improve toughness; quenching is surface hardening to improve wear resistance. For the excavator slewing ring, we usually recommend that the raceway must be induction hardened, and the gear is recommended for tooth surface quenching to cope with high-strength mining impact.
Accepted. We welcome SGS, BV or your designated third-party inspection agency to the factory for size, hardness and flaw detection before shipment.
sales@ngswbtec.com
Phone
+86 5634113031
+86 183-7996-8697
Fax
5634113031
Factory Address
Ningguo Dadao, Ningguo Economic Develope Zone, Ningguo,Xuancheng,Anhui,China
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