About Cylinder Seals
Rod wipers scrape dirt, dust, and moisture from the rod, preventing contamination inside your cylinder.
Rod seals maintain the pressure inside cylinders and prevent fluid from leaking out.
Wear rings guide the rod and piston to prevent uneven wear and optimize seal performance.
Head seals are a more reliable alternative to the standard O-ring/backup ring combination—they resist twisting and remain stable even in applications with fluctuating pressure.
Buffering seals protect hydraulic cylinders from pressure spikes and shock in high-pressure hydraulic applications.
Cushioning seals minimize wear and noise in air-powered cylinders by preventing the piston from slamming against the cylinder body.
Piston seals make a seal between their outside edge and the cylinder bore to prevent internal leaks.
Compact Hydraulic Cylinders
With a small body size, these cylinders fit into tight spaces but offer similar push forces to standard hydraulic cylinders. They’re double-acting cylinders, so they have two hydraulic ports—one to extend the piston rod and another to retract it. No matter the direction they’re moving, they can operate at nearly full force. This allows them to both push and pull multi-ton loads. All have a magnetic piston and can be used with sensors (sold separately) that electronically indicate piston position. Mount sensors to the cylinder with mounting brackets (sold separately).
For technical drawings and 3-D models, click on a part number.
O'all | Mounting Holes | Inlet/Outlet Connection— NPT | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stroke Lg. | Max. Push Force, lbs. | Max. Pull Force, lbs. | Retracted Lg. | Extended Lg. | Rod Thread Size  | Wd. | Ht. | Ctr.-to-Ctr. | Dia. | Pipe Size | Dash Size | Body Material | Max. Pressure, psi | Air Cushion Type | Each | |
3" Bore Dia. | ||||||||||||||||
| 3" | 18,070 | 12,350 | 8 15/16" | 11 7/8" | 1 1/4"-12 | 4 3/4" | 4 3/4" | 3 3/8" | 19/32" | 3/8 | 06 | Aluminum | 2,300 | No Cushion | 00000000 | 0000000 |
| 4" | 18,070 | 12,350 | 9 15/16" | 13 7/8" | 1 1/4"-12 | 4 3/4" | 4 3/4" | 3 3/8" | 19/32" | 3/8 | 06 | Aluminum | 2,300 | No Cushion | 00000000 | 000000 |
| AC Voltage | DC Voltage | Solid State Output | With Switch Component | Each | |
Reed Switch—for 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 4" Bore Dia. | |||||
|---|---|---|---|---|---|
| 24V AC, 48V AC, 100V AC | 24V DC, 48V DC, 100V DC | __ | __ | 00000000 | 000000 |
| __ | 24V DC, 100V DC | __ | LED | 00000000 | 00000 |
Solid State Switch—for 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 4" Bore Dia. | |||||
| __ | 24V DC | NPN | LED | 00000000 | 00000 |
| __ | 24V DC | PNP | LED | 00000000 | 00000 |
| For Bore Dia. | For Sensor Type | Material | Includes | Each | |
| 1 1/2", 2", 2 1/2", 3", 4" | Solid State Switch, Reed Switch | Zinc | Set Screw | 0000000 | 000000 |
Piston Seals for O-Ring Grooves
Avoid common O-ring failure in dynamic applications—the square base of these seals prevents twisting, while backup rings protect against extrusion.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
For Groove | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Bore Dia. | Dia. | Wd. | O-Ring Dash Number Equivalent | Max. Speed, ft./sec. | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Each | |
Buna-N Rubber with Nylon Plastic Backup Ring | ||||||||||
| 3" | 2.628" | 0.282" | 334 | 1.6 | 5,000 | -40° to 225° | Durometer 70A (Hard) | Black | 0000000 | 000000 |
High-Speed Piston Seals
PTFE gives these seals a slippery surface that allows rod speeds more than two times faster than our other piston seals.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
For Groove | O-Ring | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Bore Dia. | Dia. | Wd. | O-Ring Dash Number Equivalent | Max. Speed, ft./sec. | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Hardness | Color | Specifications Met | Each | |
Glass-Filled PTFE Plastic with Buna-N Rubber O-Ring | |||||||||||||
| 3" | 2.608" | 0.129" | 145 | 12 | 8,500 | -30° to 230° | Durometer 60D (Extra Hard) | Gold | Durometer 70A (Hard) | Black | ANSI B93.32, NFPA T3.19.18 | 0000000 | 00000 |
High-Stability High-Speed Piston Seals
A square O-ring prevents these piston seals from rocking in the groove. They have a slippery PTFE surface that allows rod speeds more than two times faster than our other piston seals.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
For Groove | O-Ring | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Bore Dia. | Dia. | Wd. | O-Ring Dash Number Equivalent | Max. Speed, ft./sec. | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Hardness | Color | Specifications Met | Each | |
Glass-Filled PTFE Plastic with Buna-N Rubber O-RIng | |||||||||||||
| 3" | 2.445" | 0.284" | 333 | 12 | 8,500 | -30° to 230° | Durometer 60D (Extra Hard) | Blue | Durometer 70A (Hard) | Black | ANSI B93.32, NFPA T3.19.18 | 0000000 | 00000 |
Piston Cup Seals
These Buna-N seals are reinforced with cotton thread for strength.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
High-Pressure Piston Seals
Rated for pressure up to 10,000 psi, these seals withstand the highest pressure of our piston seals. They have two high-strength backup rings that protect against extrusion.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
For Groove | O-Ring | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Bore Dia. | Dia. | Wd. | O-Ring Dash Number Equivalent | Max. Speed, ft./sec. | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Hardness | Color | Each | |
Glass-Filled PTFE Plastic with Nylon Plastic Backup Ring and Buna-N Rubber O-Ring | ||||||||||||
| 3" | 2.520" | 0.579" | Not Rated | 5 | 10,000 | -30° to 230° | Durometer 60D (Extra Hard) | Gray | Durometer 70A (Hard) | Black | 0000000 | 000000 |