| Customization: | Available |
|---|---|
| Certification: | CE, ISO9001 |
| Pressure: | High Pressure |
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Factory Direct Excavator Hydraulic Cylinder 31q9-50120 for R320LC9 R320-9 Cheap Boom Hydraulic Cylinder 
| Product Name | Double Acting Excavator Hydraulic Cylinder |
| Model | R320LC9 R320-9 R300LC-5 R260LC-7 R305LC-7 R290LC-7 |
| Quality | Original Quality |
| Application | Excavator, Construction Machinery |
| Main Material | 25Mn Steel of the tube, 45Mn Steel of the rod, Imported Oil Seal Kits(NOK-Japna, SKF-USA) |
| Warranty | 12 Months |
| Cylinder Rod | High-frequency surface hardening with hardness up to 55, plus hard chromium plating for superior wear resistance. |
| Cylinder Tube | Made from 25Mn steel, offering excellent durability and anti-wear performance. |
| Cylinder Heads | Constructed from high-strength hardened steel for maximum durability. |
| Seals | Use of premium seals from Japan N-O-K and US S-KF to enhance sealing performance and prevent leaks. |
Guangzhou Guoli Engineering Machinery Co., Ltd. (GLPARTS) has specialized in manufacturing hydraulic cylinders for over 16 years. We provide custom solutions for all types of excavators-supporting boom, arm, and bucket cylinders for small, medium, and large machines.
From material selection to final assembly, every step is strictly controlled to ensure product quality and performance. With nearly a decade of experience in international trade, our hydraulic cylinders have been exported to over 100 countries worldwide.
Customer trust has been our driving force-and we continue to grow by staying committed to professionalism, precision, and long-term reliability.
| Part Number | Model |
| 31Q7-50120 Hydraulic Boom Cylinder | R250LC9 R250LC9A R260LC9S |
| 31NA-50111 Boom Cylinder | R360LC7 |
| 33NB-60130 Hydraulic Bucket Cylinder | R500-7 R800-7 |
| 31Q9-50110 Boom Cylinder | R320LC-9 R330LC-9A R330LC-9SH |
| 31QA-50130 Arm Cylinder | R380-9 R430-9 |
| 31N9-50111 Boom Cylinder | R320LC7 R320LC7A |
| 31N7-50110 Boom Hydraulic Cylinder | R250LC7 R250LC7A |
| 31N8-50115 Hydraulic Boom Cylinder | R290LC7 R290LC7A R300LC7 R305LC7 |
| 31N6-50111 Boom Cylinder | R210LC7 R210LC7H |
| 31Q6-50110 | R210LC9 R210LC9BC R210LC9BH R220LC9A RB220LC9S |
| 31N9-60110 Bucket Hydraulic Cylinder | R320LC7 R320LC7A |
| 31NB-50240 Arm Cylinder | R450LC-7 |
| 31N5-50131 Hydraulic Arm Cylinder | 160-7 170-7 180-7 |
| 31Q7-60110 Bucket Cylinder | R250LC9 R260LC9S |
| 31N6-70031 OUTRIGGER CYLINDER | R200-7 R200W7 |
| 31N9-50130 Arm Cylinder | R320LC7 R320LC7A |
| 31N8-60110 Bucket Cylinder | R290LC7 R290LC7H R305LC7 |
| 31N7-60110 Bucket Cylinder | R250LC7 R250LC7A |
| 31NA-50132 Arm Cylinder | R360LC7 R360LC7A R370LC7 |
| 31N8-50138 Hydraulic Arm Cylinder | R290LC7 R290LC7A R300LC7 R305LC7 |
| 31Q8-50131 Arm Cylinder | R290LC9 R290LC9MH R300LC9A R300LC9S R300LC9SH R520LC9 |
| 31N4-60110 Bucket Cylinder | R140LC-7 R140LC-7A R140W7 R140W7A |
| 31N7-50132 Bucket Cylinder | R250LC7 R250LC7A |
| 31N5-60110 BUCKET CYL ASSY | R160LC7 R160LC7A R170W7 R170W7A R180LC7 R180LC7A |
| 31Q9-60110 BUCKET CYLINDER ASSY | R320LC9 R330LC9S R330LC9SH |
| 31NB-60133 BUCKET CYL ASSY | R450LC7 R450LC7A |
| 31QB-63110 Bucket Cylinder ASSY | R520LC9 R520LC9S |
| 31N6-60110 BUCKET CYLINDER | R200W7 R210LC7 R210LC7H R210NLC7 |
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