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.
Hydraulic Cylinders
For easy interchangeability, the mounting footprint of these cylinders meets NFPA and JIC (Joint Industrial Congress) industry standards. All have two hydraulic ports: one to extend the piston rod and another to retract it. Cylinders with no cushion have a compact size. Those with an adjustable cushion reduce shock to internal components and lessen machine noise.
For technical drawings and 3-D models, click on a part number.
O'all | Mounting Hole | 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. | Thread Size | Pipe Size | Dash Size | Body Material | Max. Pressure, psi | Air Cushion Type | Each | |
NFPA and JIC Heavy Duty Mounting Pattern | ||||||||||||||||
2 1/2" Bore Dia. | ||||||||||||||||
1" | 12,270 | 10,320 | 8 1/4" | 9 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | No Cushion | 000000000 | 0000000 |
2" | 12,270 | 10,320 | 9 1/4" | 11 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | No Cushion | 000000000 | 000000 |
3" | 12,270 | 10,320 | 10 1/4" | 13 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | No Cushion | 000000000 | 000000 |
4" | 12,270 | 10,320 | 11 1/4" | 15 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 000000000 | 00000000 |
5" | 12,270 | 10,320 | 12 1/4" | 17 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 000000000 | 00000000 |
6" | 12,270 | 10,300 | 13 1/4" | 19 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
7" | 12,270 | 10,300 | 14 1/4" | 21 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
8" | 12,270 | 10,300 | 15 1/4" | 23 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
9" | 12,270 | 10,300 | 16 1/4" | 25 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
10" | 12,270 | 10,300 | 17 1/4" | 27 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
11" | 12,270 | 10,300 | 18 1/4" | 29 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
12" | 12,270 | 10,300 | 19 1/4" | 31 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
For Bore Dia. | Each | |
2", 2 1/2" | 00000000 | 000000 |
For Bore Dia. | Mounting Fasteners Included | Each | |
2", 2 1/2" | No | 00000000 | 000000 |
For Bore Dia. | Each | |
2", 2 1/2" | 00000000 | 000000 |
For Bore Dia. | Mounting Fasteners Included | Each | |
2 1/2" | Yes | 000000000 | 0000000 |
For Bore Dia. | Mounting Fasteners Included | Each | |
2 1/2" | Yes | 00000000 | 0000000 |
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 | |
2 1/2" Bore Dia. | ||||||||||||||||
1" | 11,210 | 7,650 | 6 1/8" | 7" | 1"-14 | 4" | 4" | 2 11/16" | 1/2" | 1/4 | 04 | Aluminum | 2,300 | No Cushion | 00000000 | 0000000 |
2" | 11,210 | 7,650 | 7 1/16" | 9" | 1"-14 | 4" | 4" | 2 11/16" | 1/2" | 1/4 | 04 | Aluminum | 2,300 | No Cushion | 00000000 | 000000 |
3" | 11,210 | 7,650 | 8 1/16" | 11" | 1"-14 | 4" | 4" | 2 11/16" | 1/2" | 1/4 | 04 | Aluminum | 2,300 | No Cushion | 00000000 | 000000 |
4" | 11,210 | 7,650 | 9 1/16" | 13" | 1"-14 | 4" | 4" | 2 11/16" | 1/2" | 1/4 | 04 | 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 |
Sensor-Ready Hydraulic Cylinders
These cylinders have a magnetic piston that can be used with tie rod-mount proximity switches (sold separately) to electronically indicate piston position. For easy interchangeability, their mounting footprint meets NFPA or NFPA and JIC (Joint Industrial Congress) industry standards. All have two hydraulic ports: one to extend the piston rod and another to retract it. Cylinders with an adjustable cushion reduce shock to internal components and lessen machine noise. Those with no cushion have a compact size.
For technical drawings and 3-D models, click on a part number.
O'all | Mounting Hole | 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. | Thread Size | Pipe Size | Dash Size | Body Material | Max. Pressure, psi | Air Cushion Type | Each | |
NFPA and JIC Heavy Duty Mounting Pattern | ||||||||||||||||
2 1/2" Bore Dia. | ||||||||||||||||
3" | 12,270 | 10,300 | 10 1/4" | 13 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | No Cushion | 00000000 | 000000000 |
4" | 12,270 | 10,300 | 11 1/4" | 15 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
5" | 12,270 | 10,300 | 12 1/4" | 17 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
6" | 12,270 | 10,300 | 13 1/4" | 19 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
7" | 12,270 | 10,300 | 14 1/4" | 21 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
8" | 12,270 | 10,300 | 15 1/4" | 23 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
9" | 12,270 | 10,300 | 16 1/4" | 25 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
10" | 12,270 | 10,300 | 17 1/4" | 27 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
11" | 12,270 | 10,300 | 18 1/4" | 29 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
12" | 12,270 | 10,300 | 19 1/4" | 31 1/4" | 3/4"-16 | 3 1/2" | 3 1/2" | 2 9/16" | 1/2"-20 | 1/2 | 08 | Steel | 2,500 | Adjustable Cushion | 00000000 | 00000000 |
Send an electronic signal to your system when the piston reaches a certain location. Mount one or two of these sensors on a cylinder tie rod; they must be flush against the cylinder tube. An LED indicator shows the piston location. These switches are PNP (also called "sourcing") output, so they send energy onwards. PNP output is most common in solid-state relays and PLCs used in the United States and Europe.
For Bore Dia. | For Cylinder Body Material | Each | |
1 1/2"-4" | Steel | 000000 | 0000000 |
Corrosion-Resistant Hydraulic Cylinders
Made of 303 stainless steel, these hydraulic cylinders move heavy loads without corroding in wet areas. Four tie rods protect the barrel from impact and keep the end caps secure. These cylinders are double acting, meaning they pull loads as well as push them—and do so with nearly as much force. The mounting footprint meets NFPA and JIC (Joint Industrial Congress) compatibility standards.
Because they have a magnetic piston, these cylinders can be used with tie rod-mount proximity switches (not included) to indicate piston position. All have an adjustable cushion that cuts down on shock and noise.
For technical drawings and 3-D models, click on a part number.
O'all | Mounting Hole | Inlet/Outlet Connection— NPTF | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | |
NFPA and JIC Heavy Duty Mounting Pattern | ||||||||||||||||
2 1/2" Bore Dia. | ||||||||||||||||
1" | 1,960 | 1,840 | 7 1/16" | 8 1/16" | 7/16"-20 | 4 5/8" | 3" | 3 7/8" | 3/8" | 3/8 | 06 | 303 Stainless Steel | 400 | Adjustable Cushion | 0000000 | 0000000 |
2" | 1,960 | 1,840 | 8 1/16" | 10 1/16" | 7/16"-20 | 4 5/8" | 3" | 3 7/8" | 3/8" | 3/8 | 06 | 303 Stainless Steel | 400 | Adjustable Cushion | 0000000 | 000000 |
4" | 1,960 | 1,840 | 10 1/16" | 14 1/16" | 7/16"-20 | 4 5/8" | 3" | 3 7/8" | 3/8" | 3/8 | 06 | 303 Stainless Steel | 400 | Adjustable Cushion | 0000000 | 000000 |
6" | 1,960 | 1,840 | 12 1/16" | 18 1/16" | 7/16"-20 | 4 5/8" | 3" | 3 7/8" | 3/8" | 3/8 | 06 | 303 Stainless Steel | 400 | Adjustable Cushion | 0000000 | 00000000 |
8" | 1,960 | 1,840 | 14 1/16" | 22 1/16" | 7/16"-20 | 4 5/8" | 3" | 3 7/8" | 3/8" | 3/8 | 06 | 303 Stainless Steel | 400 | Adjustable Cushion | 0000000 | 00000000 |
12" | 1,960 | 1,840 | 18 1/16" | 30 1/16" | 7/16"-20 | 4 5/8" | 3" | 3 7/8" | 3/8" | 3/8 | 06 | 303 Stainless Steel | 400 | Adjustable Cushion | 0000000 | 00000000 |
Double-Ended Compact Hydraulic Cylinders
Push one heavy load while pulling another. These hydraulic cylinders have a rod that runs through both ends, so when it extends on one end, it retracts on the other. Built with a small body, they'll fit in tight spaces but operate with similar force to standard-sized hydraulic cylinders. This is in large part thanks to their two hydraulic ports: one port to extend the rod and another port to retract it. That means no matter which direction they're moving, they're giving it the same amount of power.
The piston is magnetic, so you can use these cylinders with sensors (sold separately) to activate relays and controllers. When the piston moves past a sensor, the sensor activates. You can use multiple sensors—one for each action you want to trigger.
For technical drawings and 3-D models, click on a part number.
O'all | Mounting Holes | Inlet/Outlet Connection | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Stroke Lg. | Max. Push Force, lbs. | Max. Pull Force, lbs. | Wd. | Lg. | Ht. | Ctr.-to-Ctr. | Dia. | Pipe Size | Thread Type | Body Material | Max. Pressure, psi | Air Cushion Type | Each | |
2 1/2" Bore Dia. | ||||||||||||||
1" | 26,460 | 26,460 | 3 1/16" | 6" | 3 1/16" | 2 3/8" | 11/32" | 1/4 | BSPT | Aluminum | 500 | No Cushion | 0000000 | 0000000 |
2" | 26,460 | 26,460 | 3 1/16" | 8" | 3 1/16" | 2 3/8" | 11/32" | 1/4 | BSPT | Aluminum | 500 | No Cushion | 0000000 | 000000 |
3" | 26,460 | 26,460 | 3 1/16" | 9 7/8" | 3 1/16" | 2 3/8" | 11/32" | 1/4 | BSPT | Aluminum | 500 | No Cushion | 0000000 | 000000 |
4" | 26,460 | 26,460 | 3 1/16" | 11 7/8" | 3 1/16" | 2 3/8" | 11/32" | 1/4 | BSPT | Aluminum | 500 | No Cushion | 0000000 | 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 |
Piston Seal Kits
Replace all the seals on the piston of a hydraulic cylinder.
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 | ||||||||||
2 1/2" | 2.128" | 0.282" | 330 | 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 | |||||||||||||
2 1/2" | 2.108" | 0.129" | 137 | 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 | |||||||||||||
2 1/2" | 2.193" | 0.129" | 139 | 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 | ||||||||||||
2 1/2" | 2.125" | 0.424" | Not Rated | 5 | 10,000 | -30° to 230° | Durometer 60D (Extra Hard) | Gray | Durometer 70A (Hard) | Black | 0000000 | 000000 |