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Views: 0 Author: Site Editor Publish Time: 2026-08-15 Origin: Site
Selecting the correct hydraulic cylinder honed tube requires more than choosing a nominal bore size. Engineers and purchasing teams must evaluate the finished inner diameter, outside diameter, wall thickness, bore tolerance, steel grade, working pressure and cylinder application.
This hydraulic cylinder honed tube size chart provides a practical reference for comparing common ID, OD and wall thickness combinations. It also explains how to select E355, ST52, SAE 1026, 1045, 4140 and stainless steel grades for different hydraulic cylinder barrels.
Fengdie Metal is a professional hydraulic cylinder honed tube manufacturer supplying cold-drawn seamless honed tubing with customized bore sizes, H8 tolerances, controlled wall thickness and cut-to-length processing.
A hydraulic cylinder honed tube is a precision steel tube with an accurately finished internal bore. It is commonly used as the cylinder barrel through which the piston and seals move.
The product is also known as:
Honed cylinder tubing
Hydraulic cylinder barrel tube
Honed bore tube
Seamless honed steel tube
Hydraulic ram tube
Precision honed tubing
SRB tube
Ready-to-use cylinder tube
Unlike an ordinary seamless steel pipe, hydraulic cylinder tubing requires strict control of the finished ID, roundness, straightness and inner surface roughness. Most cylinder manufacturers specify an H8 bore tolerance and an internal roughness of approximately Ra 0.2–0.4 μm.
Customers who need more information about bore finishing can read our H8 tolerance, Ra 0.4 surface finish and SRB process guide.
The following hydraulic cylinder honed tube size chart covers frequently requested metric dimensions. The values are intended as a selection reference. Final stock availability, dimensional tolerances and mechanical properties should be confirmed before ordering.
| Finished ID(mm) | OD(mm) | Nominal Wall Thickness(mm) | Common Steel Grades | Appliction |
| 30 | 40 | 5 | E355, ST52, SAE 1026 | Small hydraulic cylinders |
| 32 | 42 | 5 | E355, ST52 | Pneumatic and light hydraulic equipment |
| 35 | 45 | 5 | E355, SAE 1026 | Agricultural machinery |
| 40 | 50 | 5 | E355, ST52 | Compact hydraulic cylinders |
| 40 | 55 | 7.5 | E355, 1045 | Medium-pressure cylinders |
| 45 | 55 | 5 | E355, SAE 1026 | Material-handling equipment |
| 50 | 60 | 5 | E355, ST52 | Standard industrial cylinders |
| 50 | 65 | 7.5 | E355, 1045 | Medium-duty cylinder barrels |
| 55 | 65 | 5 | E355, SAE 1026 | Lifting and positioning equipment |
| 60 | 70 | 5 | E355, ST52 | General hydraulic systems |
| 63 | 75 | 6 | E355, ST52 | Standard metric cylinders |
| 63 | 80 | 8.5 | E355, 1045 | Heavy-duty hydraulic cylinders |
| 70 | 80 | 5 | E355, SAE 1026 | Industrial automation |
| 70 | 85 | 7.5 | E355, 1045 | Construction machinery |
| 75 | 90 | 7.5 | E355, ST52 | Mobile hydraulic equipment |
| 80 | 95 | 7.5 | E355, ST52 | Excavators and loaders |
| 80 | 100 | 10 | 1045, 4140 | High-pressure cylinders |
| 90 | 105 | 7.5 | E355, ST52 | Agricultural and lifting cylinders |
| 90 | 110 | 10 | 1045, 4140 | Heavy-duty cylinder barrels |
| 100 | 115 | 7.5 | E355, ST52 | Industrial hydraulic presses |
| 100 | 120 | 10 | E355, 1045, 4140 | Construction equipment |
| 110 | 130 | 10 | E355, 1045 | Mining and material handling |
| 125 | 145 | 10 | E355, ST52, 1045 | Large hydraulic cylinders |
| 140 | 160 | 10 | E355, 1045 | Press and lifting equipment |
| 160 | 180 | 10 | E355, 1045, 4140 | Heavy construction machinery |
| 180 | 200 | 10 | E355, 1045 | Large-bore hydraulic systems |
| 200 | 220 | 10 | E355, 1045, 4140 | Industrial presses and cranes |
| 250 | 280 | 15 | 1045, 4140 | High-load cylinder barrels |
| 300 | 340 | 20 | 4140, custom alloy steel | Extra-large hydraulic cylinders |
| Steel Grade | Related Standard | Main Characteristics | Applications |
| E355 | EN 10305-1 / EN 10305-4 | Good strength, dimensional stability and weldability | General hydraulic and pneumatic cylinders |
| ST52 / ST52.3 | DIN 2391 | Widely used carbon-manganese cylinder tube grade | Construction, agriculture and industrial hydraulics |
| SAE 1026 | ASTM A519 | Good cold-drawing performance and machinability | Standard seamless hydraulic cylinder tubes |
| 20# Steel | GB/T 3639 | Economical low-carbon steel with good processing performance | Light and medium-duty cylinders |
| 45# / AISI 1045 | GB/T 3639 / ASTM A519 | Higher strength and wear resistance than low-carbon steel | Medium and heavy-duty hydraulic cylinders |
| SAE 4130 | ASTM A519 | High strength with good toughness and weldability | Mobile equipment and high-load systems |
| SAE 4140 / 42CrMo | ASTM A519 | High tensile strength, fatigue resistance and impact resistance | High-pressure and shock-loaded cylinders |
| 304 Stainless Steel | ASTM A511 | Good general corrosion resistance | Food equipment and wet environments |
| 316 Stainless Steel | ASTM A511 | Better resistance to chloride and chemical corrosion | Marine, chemical and offshore equipment |
Material properties can vary according to heat treatment and delivery condition. The final purchase order should state the required standard, grade, heat-treatment condition and EN 10204 inspection certificate.
For applications that require cold-drawn blanks before bore finishing, see our precision seamless steel tube specifications.
E355 and ST52 are among the most frequently requested steel grades for hydraulic cylinder tubes. They provide a practical balance of strength, weldability, machinability and cost.
An E355 or ST52 honed tube is commonly selected for:
Excavator hydraulic cylinders
Agricultural machinery
Forklifts
Hydraulic presses
Material-handling equipment
Industrial automation
Lifting platforms
Truck and trailer hydraulic systems
For most general-purpose hydraulic cylinders, E355 or ST52 is a cost-effective starting point. For high pressure, severe impact or demanding fatigue conditions, 1045 or 4140 alloy steel may be more suitable.
H8 is one of the most common finished-bore tolerances for hydraulic cylinder tubing. Under the ISO hole-basis system, the lower deviation for an H8 bore is zero, while the permitted variation is above the nominal diameter.
| Nominal Finished ID | Typical H8 Tolerance | Acceptable Bore Range |
| 30 mm | +0.033/0 mm | 30.000–30.033 mm |
| 40 mm | +0.039/0 mm | 40.000–40.039 mm |
| 50 mm | +0.039/0 mm | 50.000–50.039 mm |
| 63 mm | +0.046/0 mm | 63.000–63.046 mm |
| 80 mm | +0.046/0 mm | 80.000–80.046 mm |
| 100 mm | +0.054/0 mm | 100.000–100.054 mm |
| 125 mm | +0.063/0 mm | 125.000–125.063 mm |
| 160 mm | +0.063/0 mm | 160.000–160.063 mm |
| 200 mm | +0.072/0 mm | 200.000–200.072 mm |
| 250 mm | +0.072/0 mm | 250.000–250.072 mm |
Higher internal pressure generally requires a thicker cylinder wall or a stronger steel grade. The design must consider both normal working pressure and proof or test pressure.
A larger bore produces greater force but also increases stress on the cylinder barrel. Long-stroke cylinders additionally require better tube straightness to prevent uneven piston and seal wear.
A cylinder exposed to shock loads, vibration, side loading or frequent pressure cycles may require a thicker wall or alloy steel such as 4140.
The OD may require turning, threading, welding or mounting-hole machining. Sufficient material must remain after these operations.
Hydraulic cylinders used in marine, chemical or outdoor environments may require additional wall allowance, protective coatings or 304/316 stainless steel honed tubing.
The final wall thickness and pressure rating should be verified by the hydraulic cylinder designer according to the applicable design standard. A size chart is a useful sourcing reference, but it does not replace engineering calculations.
| Item | Conventional Honing | Skiving and Roller Burnishing |
| Process | Abrasive stones remove material gradually | Skiving removes material before rollers compress the surface |
| Typical Surface Finish | Ra 0.2–0.4 μm | Ra 0.1–0.4 μm |
| Bore Appearance | Controlled cross-hatch pattern | Smooth, mirror-like surface |
| Production Speed | Relatively slower | Faster for volume production |
| Suitable Orders | Custom sizes and smaller batches | Medium and high-volume production |
| Main Advantage | Excellent geometry correction and oil retention | High efficiency and work-hardened bore surface |
Working directly with a hydraulic cylinder honed tube manufacturer helps buyers maintain consistent dimensions and reduce unnecessary machining costs.
A qualified manufacturer should provide:
Certified raw materials
Stable ID, OD and wall thickness
H8 or customized bore tolerance
Controlled roundness and straightness
Verified inner surface roughness
Material traceability
Dimensional inspection reports
Non-destructive testing when required
Customized lengths and end processing
Export packaging with tube-end protection
As a China hydraulic cylinder tube manufacturer, Fengdie Metal supplies carbon steel, alloy steel and stainless steel honed tubing for hydraulic machinery, construction equipment, agricultural systems, industrial presses and OEM cylinder production.
Common finished bore sizes include 40, 50, 63, 80, 100, 125, 160 and 200 mm. Wall thicknesses of approximately 5–10 mm are frequently used for standard cylinders, while larger or high-pressure cylinders may require thicker walls.
ID is the finished inner diameter of the hydraulic cylinder tube. It forms the working bore for the piston and seals. OD is the outside diameter of the tube. Wall thickness equals half the difference between OD and ID.
Hydraulic cylinder honed tubing is usually selected primarily by the finished ID because the cylinder bore must match the piston and sealing system. The OD and wall thickness are then determined according to pressure, strength and machining requirements.
H8 is the most common finished ID tolerance. H7 can be supplied for applications requiring tighter bore control, while H9 may be acceptable for less demanding systems.
Ra 0.2–0.4 μm is commonly specified. However, seal performance also depends on Rz, cross-hatch pattern, peak structure and oil-retention valleys.
E355 and ST52 are suitable for many general hydraulic applications. SAE 1026 offers good machinability, 1045 provides higher strength, and 4140 is preferred for high-pressure or shock-loaded cylinders. Stainless steel 304 or 316 is used in corrosive environments.
Yes. A custom honed tube manufacturer can produce non-standard IDs, ODs, wall thicknesses and lengths according to customer drawings. Minimum order quantity and production time depend on the required size, grade and processing method.
