Carbon Steel Welded Hydraulic Cylinder Rod End Bearing 10-80 mm Bore Size
Price:
$0.90 - $70.00
MOQ:
100pcs
Delivery Time:
5-8 working days
Brand:
SYX
Product Description
Welded Cylinder Bearing GK Series
Welded cylinder bearings, also known as joint bearings, are specifically designed for hydraulic cylinder connection parts, particularly rod end bearings with weldable earrings. Common models include GK series (such as GK17DO, GK20DO) and GF series. These bearings are widely used in construction machinery and hydraulic equipment to provide flexible rotational connections between cylinders and structural components.
This bearing type consists of an outer ring, inner ring, spherical plain bearings, and sealing structure. The outer ring features earrings that can be welded directly to equipment structures. Key characteristics include strong load-bearing capacity, impact resistance, and easy installation. Available in both non-lubricated and oil-lubricated types, some products include locking ports to enhance hydraulic cylinder connection reliability.
Product Specifications:
| Bearing Code | Dimensions (mm) | Load Rating kN | =a° | Unit Weight (kg) | ||||||||||||
| d | B | dk | C1 | d2 | h | l2 | l7 | d5 | d6 | e | rs | Dynamic | Static | |||
| GK10DO | 10 | 9 | 16 | 7 | 29 | 24 | 38.5 | 15 | 15 | 3 | 2 | 0.3 | 8.1 | 15 | 12 | 0.041 |
| GK12DO | 12 | 10 | 18 | 8 | 34 | 27 | 44 | 17.5 | 17.5 | 3 | 2 | 0.3 | 10 | 21 | 10 | 0.066 |
| GK15DO | 15 | 12 | 22 | 10 | 40 | 31 | 51 | 20 | 21 | 4 | 2.5 | 0.3 | 16 | 32 | 8 | 0.120 |
| GK17DO | 17 | 14 | 25 | 11 | 48 | 35 | 58 | 23 | 24 | 4 | 3 | 0.3 | 21 | 31 | 10 | 0.190 |
| GK20DO | 20 | 16 | 29 | 13 | 53 | 38 | 64.5 | 27.5 | 27.5 | 4 | 3 | 0.6 | 21 | 40 | 10 | 0.180 |
| GK25DO | 25 | 20 | 35.5 | 17 | 64 | 45 | 77 | 33 | 33.5 | 4 | 4 | 0.6 | 48 | 75 | 7 | 0.450 |
| GK30DO | 30 | 22 | 40.7 | 19 | 73 | 51 | 87.5 | 37.5 | 40 | 4 | 4 | 0.6 | 62 | 95 | 6 | 0.670 |
| GK35DO | 35 | 25 | 47 | 21 | 82 | 61 | 102 | 43 | 47 | 4 | 4 | 0.6 | 79 | 125 | 6 | 1.020 |
| GK40DO | 40 | 28 | 53 | 23 | 92 | 69 | 115 | 48 | 52 | 6 | 5 | 0.6 | 99 | 156 | 7 | 1.400 |
| GK45DO | 45 | 32 | 60 | 27 | 102 | 77 | 128 | 52 | 58 | 6 | 5 | 0.6 | 127 | 208 | 7 | 1.930 |
| GK50DO | 50 | 35 | 66 | 30 | 112 | 88 | 144 | 59 | 62 | 6 | 6 | 0.6 | 156 | 250 | 6 | 2.690 |
| GK60DO | 60 | 44 | 80 | 38 | 135 | 100 | 167.5 | 72.5 | 70 | 6 | 8 | 1 | 245 | 294 | 6 | 4.000 |
| GK70DO | 70 | 49 | 92 | 42 | 160 | 115 | 195 | 85.5 | 80 | 6 | 10 | 1 | 313 | 510 | 6 | 7.000 |
| GK80DO | 80 | 55 | 105 | 47 | 180 | 141 | 231 | 98 | 95 | 6 | 10 | 1 | 400 | 620 | 6 | 11.000 |
Product Features
- High Structural Rigidity: Welded earrings create integrated connections that are more secure than bolted connections, enhancing overall structural rigidity and torsional resistance
- Flexible Installation: Earring design allows installation from multiple angles and supports various connection methods including single earrings, double earrings, and flanges to accommodate different cylinder layouts
- Wear Resistant & Low Maintenance: Composite materials on inner and outer spherical surfaces enable self-lubrication during movement, reducing external lubrication requirements in frequent refueling conditions
- Cost Effective: Simple structure and easy installation reduce wearing part quantities and assembly time, lowering overall procurement and maintenance costs
Usage Questions & Answers
Where is this type of bearing used?
Widely used in various mechanical systems requiring strong load-bearing capacity including hydraulic cylinders, mining machinery, mechanical engineering, construction machinery, and production lines.
Why choose hydraulic cylinder bearings over other bearing types?
These bearings feature weldable faces that can be firmly welded, serving as reliable connections between cylinders and structural components.
How to choose an ideal bearing?
- Ensure inner diameter (d), outer diameter (D), and thickness (B) match shaft diameter and installation space requirements
- Verify earring bore diameter and welding dimensions comply with design drawings to ensure welding strength and positioning accuracy
- Select appropriate clearance: Choose larger clearance (C3 clearance) for high-temperature or high-speed working conditions to prevent jamming from thermal expansion
How to install correctly?
Cold Installation (Small Sizes)
- Apply uniform force to inner or outer ring using a sleeve and pressing machine
- Insert bearing into shaft or bearing seat without directly striking with a hammer
- Apply small amount of lubricating oil on contacting surfaces to reduce friction
Hot Installation (Larger Sizes)
- Heat bearing to 80-100℃ before inserting onto shaft
- Use induction heaters or oil bath heating for even heat distribution
- Avoid heating bearings with seals or dust covers above 80℃ to prevent seal material damage
Purchasing Guide
- Loading Type and Force: Determine radial load, axial load, or composite load, then estimate maximum force value. For high-impact or heavy-load scenarios (excavators, rollers), recommend self-aligning roller bearings or welded joint bearings with thickened outer rings
- Motion Form: Consider swing angle and frequency. Small-angle high-frequency swing suits self-lubricating joint bearings (GK series). Choose sealed radial joint bearings for large-angle low-frequency conditions
- Environmental Conditions: Select bearings with double-sided sealing (2RS), surface phosphating, or galvanizing treatment for harsh environments including high temperature, humidity, and dusty areas
- Installation Requirements: Accurately measure installation space and shaft diameter according to standard size charts
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Company
Shanghai Yongxing Bearing Manufacturing Co., Ltd.
Location
Rm907, No350, South Shanxi Rd. Shanghai, 200001, China
Contact Person
Catherine Wei