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End clearance on piston rings depends on ring design, material andapplication. The following end clearances are provided as a standard for hydraulic cylinder applications. When using iron piston rings, it is crucial to use the correct groove design for proper performance of the cylinder. Please use the following guidelines when cutting an iron piston ring groove.

GROOVE WIDTH: To permit the ring to slide freely into the groove, the groove must be at least 0.001” wider than the maximum piston ring width with a tolerance of +0.003”/-0.000”.

GROOVE DEPTH: Grooves must be at least 0.015” deeper than the maximum radial wall thickness of the piston ring with a tolerance of +0.003”/-0.000”. This is to avoid any possibility of the ring bottoming in the groove when the ring is compressed to its working diameter.

RADIAL CLEARANCE: The radial clearance between the cylinder bore and piston should be less than 1/3 of the radial wall thickness of the piston ring to ensure sealing effectiveness.

Iron Material | 0.142 in Cross Section | Piston Seal

Cast Iron Rod Clevis Mount with a 2.5 in – 12 TPI threaded end and a 3 in pin hole.

Clevis mounts help maintain alignment and protect the cylinder from side load. Mounts attach to threaded stud ends, pivot holes, or bolt holes on the cylinder. Can be used with hydraulic cylinders with standard bore sizes.

WR-NYL, 6 X 1/2 Wear Ring

O-rings as elastic loops that seal static and dynamic applications. They are used to seal the space between cylinders, pistons, pipes and tubes and can be made from various materials.

70 Durometer | Buna-N Rubber Material | 1 9/16 in Nominal Inner Diameter | 3/32 in Cross Section | O-Ring

Features

• Pressure range varies according to diametral clearance
• Temperature range of -40 °F to -240 °F

Wear rings provide a hard-wearing surface that protects the cylinder walls and the piston rod from scoring and abrasion. By maintaining alignment and reducing side loads, these rings facilitate smoother piston movement and lower friction levels.

Nylon Material | 1 1/2 in Nominal Inner Diameter | 1/8 in Cross Section | Wear Ring

Features

• Protection Against Wear
• Reduced Friction
• Extended Cylinder Life
• Operational Efficiency

Solid Teflon backup ring with a flat cross-section.

PTFE can withstand high temperatures and is compatible with nearly all fluids.

PTFE Material | 6 in Nominal Inner Diameter | 1/8 in Cross Section | Backup Ring

Features

• High strength and abrasion resistance
• Wide temperature range
• Chemical resistance
• Low friction
• Easy installation
• Deals very well with surface wear

WS, 1/16 X 1/2Wear Strip BRONZE

HC-3500-12 has a 4 in OD and is made to fit a 3 in bore cylinder.

Head cap size is determined based on the bending stress.

A static seal or o-ring is used in between the head cap and barrel (except welded construction).

The main function of the head cap is to enclose the pressure chamber at one end. The cap is connected to the cylinder body by means of welding, threading, bolts, or tie rod.

HT-4500X3750 has a wall thickness of 0.375 in. The ID is 3.75 in and the OD is 4.5 in. The material is DOM 1026 Carbon Steel and has been stress-relieved and annealed.

Full mill lengths will be cut to lengths between 12 ft and 19 ft long. Packages longer than 44 inches may have additional freight charges.

MHT-70X80 has a wall thickness of 5 mm. The ID is 70 mm and the OD is 80 mm. The material is 1026 Carbon Steel and has been stress-relieved and annealed.

Full mill lengths will be cut to lengths between 12 ft and 19 ft long. Packages longer than 44 inches may have additional freight charges.