Hollow Rod Cylinders
Single and Double Acting
- Three capacities from 4,600 lbs to 11,700 lbs clamp force at rated pressure.
- Also called Power Nuts, hollow cylinders will draw or tighten an appropriately sized bolt to clamp or actuate remote mechanisms.
- Keyhole shaped bodies make maximum use of space, sized to piston diameter with additional bulk added for the ports only, not the entire body.
- Easily used to add hydraulics to existing strap clamps or pull against C washers.
- Double acting models push and pull with equal force because both sides of the piston have identical areas.
Bolt size threads in piston ends allow the use of standard bolts or threaded rods for remote actuators. Vent port with bronze filter gives the cylinder a place to breathe and helps keep chips and coolants from drawing past wipers (double acting unclamp port or for single acting breather line installation). Pistons are retained by a specially designed end cap which reduces spring stresses allowing them to run longer and require less maintenance.
* The Cylinder Forces listed are for cylinders operating at 5000 psi, the maximum operating pressure. Cylinder force can be adjusted by changing the hydraulic pressure to the cylinder. To calculate the approximate output force for an application, multiply the Effective Piston Area by the predetermined operating pressure. The actual output force will vary slightly due to frictional losses, within the cylinder assembly, and/or return spring forces.
For proper sealing, mating surface must be flat within 0.003 with a maximum 63 µin Ra surface finish.
| Model No. | Clamp Capacity (lb.) Extend | Hydraulic Connection | Stroke (in.) | Body Size | Minimum Length (in) | Piston Area (sq. in.) Extend | Oil Capacity Extend (cu. in.) |
|---|---|---|---|---|---|---|---|
| 20-2113-03 | 4600 | SAE | 0.25 | 2.16 X 1.63 X 1.72 | 2.00 | 0.920 | 0.230 |
| 20-2115-04 | 6600 | SAE | 0.38 | 2.44 X 1.95 X 2.22 | 2.50 | 1.325 | 0.500 |
| 20-2120-05 | 11700 | SAE | 0.50 | 2.99 X 2.54 X 2.59 | 3.00 | 2.356 | 1.178 |
| 21-2113-03 | 4600 | SAE & Manifold | 0.25 | 2.16 X 1.63 X 1.72 | 2.00 | 0.920 | 0.230 |
| 21-2115-04 | 6600 | SAE & Manifold | 0.38 | 2.44 X 1.95 X 2.22 | 2.50 | 1.325 | 0.500 |
| 21-2120-05 | 11700 | SAE & Manifold | 0.50 | 2.99 X 2.54 X 2.59 | 3.00 | 2.356 | 1.178 |
| Model No. | Clamp Capacity (lb.) Extend | Hydraulic Connection | Stroke (in.) | Body Size | Minimum Length (in) | Piston Area (sq. in.) Extend | Oil Capacity Extend (cu. in.) |
|---|---|---|---|---|---|---|---|
| 20-2213-03 | 4600 | SAE | 0.25 | 2.16 X 1.63 X 1.72 | 2.00 | 0.920 | 0.230 |
| 20-2215-04 | 6600 | SAE | 0.38 | 2.44 X 1.95 X 2.22 | 2.50 | 1.325 | 0.500 |
| 20-2220-05 | 11700 | SAE | 0.50 | 2.99 X 2.54 X 2.59 | 3.00 | 2.356 | 1.178 |
| Model No. | A | B | C | D | E | F | G | H | J | K | L | M | P | Q | R | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20-2113-03 | 2.00 | 0.25 | 0.25 | 1.72 | 1.63 | 1.25 | 2.16 | 0.97 | 1/4 - 20 X 0.25 | 0.41 | 0.47 | 0.81 | 3/8 - 16 X 0.59 | 0.63 | 1.56 | N/A |
| 20-2115-04 | 2.50 | 0.38 | 0.25 | 2.22 | 1.95 | 1.44 | 2.44 | 0.94 | 5/16 - 18 X 0.31 | 0.53 | 0.72 | 1.00 | 1/2 - 13 X 0.59 | 0.75 | 1.88 | N/A |
| 20-2120-05 | 3.00 | 0.50 | 0.38 | 2.59 | 2.54 | 2.00 | 2.99 | 1.13 | 3/8 - 16 X 0.50 | 0.66 | 0.91 | 1.19 | 5/8 - 11 X 0.72 | 1.00 | 2.50 | N/A |
| 21-2113-03 | 2.00 | 0.25 | 0.25 | 1.72 | 1.63 | 1.25 | 2.16 | 0.97 | 1/4 - 20 X 0.25 | 0.41 | 0.47 | 0.81 | 3/8 - 16 X 0.59 | 0.63 | 1.56 | 0.750 |
| 21-2115-04 | 2.50 | 0.38 | 0.25 | 2.22 | 1.95 | 1.44 | 2.44 | 0.94 | 5/16 - 18 X 0.31 | 0.53 | 0.72 | 1.00 | 1/2 - 13 X 0.59 | 0.75 | 1.88 | 0.875 |
| 21-2120-05 | 3.00 | 0.50 | 0.38 | 2.59 | 2.54 | 2.00 | 2.99 | 1.13 | 3/8 - 16 X 0.50 | 0.66 | 0.91 | 1.19 | 5/8 - 11 X 0.72 | 1.00 | 2.50 | 1.000 |
| Model No. | A | B | C | D | E | F | G | H | J | K | L | M | P | Q | R | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20-2213-03 | 2.00 | 0.25 | 0.25 | 1.72 | 1.63 | 1.25 | 2.16 | 0.97 | 1/4 - 20 X 0.25 | 0.41 | 0.47 | 0.81 | 3/8 - 16 X 0.59 | 0.63 | 1.56 | N/A |
| 20-2215-04 | 2.50 | 0.38 | 0.25 | 2.22 | 1.95 | 1.44 | 2.44 | 0.94 | 5/16 - 18 X 0.31 | 0.53 | 0.72 | 1.00 | 1/2 - 13 X 0.59 | 0.75 | 1.88 | N/A |
| 20-2220-05 | 3.00 | 0.50 | 0.38 | 2.59 | 2.54 | 2.00 | 2.99 | 1.13 | 3/8 - 16 X 0.50 | 0.66 | 0.91 | 1.19 | 5/8 - 11 X 0.72 | 1.00 | 2.50 | N/A |
You have questions? WE HAVE ANSWERS!
Use the contact button below to be connected with one of our team of experts.