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GF20DO GF30DO GF50DO GF80DO Hydraulic Rod End Industrial Ball Joint Spherical

China GF20DO GF30DO GF50DO GF80DO Hydraulic Rod End Industrial Ball Joint Spherical

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GF20DO GF30DO GF50DO GF80DO Hydraulic Rod End Industrial Ball Joint Spherical

MOQ： 500 pcs
Price： USD1.80-33.50/1 piece, EXW Shanghai, China MOQ: 500 pcs
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Swivelangle	±15 degrees
Packaging Details	carton
Manufacturer	ABC Hydraulics
Temperaturerange	-40°C to 120°C
Material	Steel
Productname	Hydraulic Rod End
Bearingtype	Spherical Plain Bearing
Payment Terms	T/T
Weight	150 grams
Delivery Time	20 work days
Threadtype	Metric
Rodendtype	Male
Surfacetreatment	Zinc Plated
Threadsize	M12
Supply Ability	10000.00pcs/ per month
Sealing	Rubber Seal
Loadcapacity	5000 N
Corrosionresistance	High
Application	Hydraulic Cylinders
Brand Name	SYX/OEM
Place of Origin	Shanghai, China
Model Number	GF20DO, GF25DO, GF30DO, GF35DO,GF40DO,GF45DO, GF50DO,GF60DO,GF70DO,GF80DO
Certification	IATF 16949:2016

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Product Details
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Product Specification


Swivelangle	±15 degrees	Packaging Details	carton
Manufacturer	ABC Hydraulics	Temperaturerange	-40°C to 120°C
Material	Steel	Productname	Hydraulic Rod End
Bearingtype	Spherical Plain Bearing	Payment Terms	T/T
Weight	150 grams	Delivery Time	20 work days
Threadtype	Metric	Rodendtype	Male
Surfacetreatment	Zinc Plated	Threadsize	M12
Supply Ability	10000.00pcs/ per month	Sealing	Rubber Seal
Loadcapacity	5000 N	Corrosionresistance	High
Application	Hydraulic Cylinders	Brand Name	SYX/OEM
Place of Origin	Shanghai, China	Model Number	GF20DO, GF25DO, GF30DO, GF35DO,GF40DO,GF45DO, GF50DO,GF60DO,GF70DO,GF80DO
Certification	IATF 16949:2016
High Light	GF Series Hydraulic Rod End Bearing ，Industrial Ball Joint Spherical Bearing ，Cylinder Rod End Ball Joint Bearing

GF…DO series are heavy‑duty welded‑base rod end bearings (spherical plain bearing rod ends) designed for hydraulic/pneumatic cylinders, industrial linkages, and structural articulation joints. They combine a GE…ES radial spherical plain bearing with a robust weldable steel housing featuring a rectangular mounting base, enabling direct welding to machine frames, cylinder rods, or structural components. Key features include accommodation of angular misalignment up to ±7°, support for high radial and axial combined loads, weldable housing for rigid permanent installation, steel‑on‑steel sliding contact with grease lubrication, compliance with DIN ISO 12240‑4, and availability in bore sizes from 20 mm to 80 mm.

Design: GF…DO (welded base, maintenance type) with GE…ES bearing insert. Bore diameter (d): 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120 mm (metric series). Angular misalignment: ±7° (static and dynamic). Material: housing is weldable steel, bearing is chrome steel (GCr15/100Cr6), heat‑treated. Surface: phosphated or black oxide for corrosion resistance. Lubrication: grease fitting (standard), relubricatable. Operating temperature: -30 °C to +120 °C, short‑term up to 150 °C. Load type: radial + axial combined with high static/dynamic load capacity. Mounting: rectangular welded base for direct welding to structures. Standards: DIN ISO 12240‑4, DIN 648 (industrial quality). Typical dimension example for GF40DO: d=40 mm, B=32 mm, d2=90 mm, C1=40 mm, H=77 mm, weight=2.4 kg.

Typical Applications

Typical applications include hydraulic/pneumatic cylinders (mobile machinery, industrial presses), construction machinery such as excavators, loaders, bulldozers, agricultural equipment including tractors, harvesters, sprayers, material handling equipment like forklifts, cranes, conveyor linkages, automotive and commercial vehicles for suspension and steering linkages, industrial machinery such as presses, forging machines, automation lines, marine and offshore equipment including hatch linkages and winch systems, and structural articulation joints in steel structures.

Product Selection Guide

Step 1: Define Load & Motion. For radial load dominant applications, use standard GF…DO. For high axial load, verify combined load rating and consider GF…DO with reinforced housing. For oscillatory motion up to ±7°, GF…DO is ideal; avoid pure rotation. Step 2: Bore Size & Shaft Fit. Select bore (d) to match shaft diameter (h6/h7 tolerance recommended). Ensure shaft hardness ≥ 55 HRC for steel‑on‑steel contact. Step 3: Mounting & Installation. Choose GF…DO for permanent rigid mounting via welded base. For threaded rod ends, select GI…KO/GI…LO series instead. Weld housing before installing bearing insert to prevent heat damage. Step 4: Environment & Maintenance. For standard environment, use GF…DO with grease lubrication (relubricate every 500–1000 hours). For corrosive environment, select stainless steel variant (GF…DO SS). For low‑maintenance demand, choose maintenance‑free PTFE‑lined version (GF…DO 2RS). Recommended models by application: GF30DO, GF40DO, GF50DO for general hydraulic cylinders; GF60DO, GF70DO, GF80DO for construction machinery; GF20DO, GF25DO, GF35DO for agricultural equipment; GF…DO‑SS for corrosive/marine environments; GF…DO‑2RS for low‑maintenance requirements.

FAQ
Q1: What is the difference between GF…DO and standard rod ends?

A: GF…DO features a rectangular welded base for direct welding to structures, while standard rod ends use male/female threads. GF…DO is designed for high‑load, permanent installations in hydraulic cylinders and heavy machinery.

Q2: Is the GF…DO series maintenance‑free?

A: Standard GF…DO is grease‑lubricated (maintenance type) and requires periodic relubrication. For maintenance‑free operation, choose the PTFE‑lined GF…DO‑2RS variant.

Q3: Can GF…DO bearings be used for continuous rotation?

A: No. They are designed for oscillating motion (≤ ±7°). Continuous rotation will cause rapid wear and failure.

Q4: What lubricant is recommended? A: Use high‑pressure lithium complex grease (NLGI 2) with EP additives. Relubricate every 500–1000 operating hours, or more frequently in harsh environments.

Q5: Can the housing be welded after bearing installation?

A: No. Welding generates high heat that will damage the bearing’s sliding surface and lubricant. Weld the housing first, then install the bearing insert. Q6: What is the allowable misalignment?

A: Up to ±7° angular misalignment, suitable for compensating shaft deflection and assembly tolerances.

Q7: Are stainless steel versions available?

A: Yes, GF…DO‑SS (stainless steel housing and bearing) is available for corrosive, marine, or food‑processing environments.

Q8: What is the service life?

A: Under proper lubrication and load conditions, service life typically exceeds 5000–8000 operating hours. Severe shock, contamination, or lack of lubrication will reduce life.

Q9: Can GF…DO be used in high temperatures?

A: Standard operating temperature is -30 °C to +120 °C. Short‑term operation up to 150 °C is possible with high‑temperature grease.

Q10: Are these bearings interchangeable with INA/SKF equivalents?

A: Yes, GF…DO conforms to DIN ISO 12240‑4 and is dimensionally interchangeable with INA GF…DO‑A and SKF GE…DO series.

Company Details

Bronze Gleitlager

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Business Type:

Manufacturer 
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Year Established:

1996 
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Total Annual:

30000000-50000000
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Employee Number:

150~200 
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Ecer Certification：

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Founded in 1996, Shanghai YongXing Bearing Manufacturing Co., Ltd. (SYX) has evolved from a leading manufacturer into a certified innovator at the forefront of precision motion technology. We specialize in engineering and producing high-performance spherical plain bearings, rod ends, and cam f... Founded in 1996, Shanghai YongXing Bearing Manufacturing Co., Ltd. (SYX) has evolved from a leading manufacturer into a certified innovator at the forefront of precision motion technology. We specialize in engineering and producing high-performance spherical plain bearings, rod ends, and cam f...

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Shanghai Yongxing Bearing Manufacturing Co., Ltd.
Rm907, No350, South Shanxi Rd. Shanghai, 200001, China
https://www.bearing-spherical.com/

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