Roemheld Hollow Cylinders
7250 psi maxSingle and Double Acting
Hollow Cylinders have a hole through the center of their plunger to accept a stud or drawbar. The version has a plunger extension underneath to prevent drawing in chips and coolant when the cylinder is used in inverted position. Useful for transmitting force to a remote location using a drawbar. Hollow Cylinders can be used for pulling or for pushing.
The plunger's center hole is threaded at the top end with counterbored relief below. These threads can optionally be drilled out to the counterbore diameter if an unthreaded center hole is required. A threaded center hole is ideal for pulling or pushing a drawbar. An unthreaded center hole is useful if the clamp is removed for workpiece loading.
Clamping Action
Applying fluid pressure advances the plunger, pulling up a stud or drawbar inserted through the center hole. Spring return (single acting) or fluid return (double acting).
Design Considerations
Hollow Cylinders exert considerable force, so always use a grade 8 stud or equivalent drawbar at 5000 psi and above.
Mounting & Fluid Supply
Mounting on a Clamp Strap:Use either a threaded-hole or unthreaded-hole clamp. Mount on the clamp strap's center stud (longer stud usually required). Use a Spherical Washer underneath the clamp to compensate for clamp-strap angle. When using a threaded-hole clamp, install with a flexible hose because the clamp body will move slightly during clamping.
Mounting on a Fixture Plate:Insert four socket-head cap screws through the flange base from above and screw into fixture. Alternatively, insert cap screws up through the fixture plate and screw into the clamp from below.
Mounting through a Bored Hole:Insert four socket-head cap screws through the flange base from below and screw into fixture. Alternatively, fasten with optional lock nut.
Fluid Connection:1/4" BSPP port (two for double-acting clamps). Do not use NPT fittings.
Material
Plunger > Steel, case hardened. Body > Steel, black oxide Finish.
Parts Specification
Max Pull Force (lbs) | Max Push Force (lbs) | Max Pull Force (kn) | Max Push Force (kn) | Center- Hole Stud Size | Rod Diameter (mm) | Stroke | A Body Thread (mm) | B Body Diameter (mm) | C Flange Diameter (mm) | G Body Height (mm) |
10600 lbs. | 8500 lbs. | 47 kN | 38 kN | M12 | 25mm | 16 | M60 x 1.5mm | 60mm | 85mm | 80mm |
Warning:
This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov