Recommended Precautions For The Designer, Builder & Operator
IMPORTANT: READ THIS SHEET CAREFULLY BEFORE OPERATING.
Roemheld Power Workholding components are high quality products, engineered and manufactured to give you long, dependable and safe performance. For proper and safe operation, please follow all instructions on this sheet. Save these instructions for future reference.
SERVICE NOTE: Most Roemheld components are 100% individually tested for proper operation before leaving the factory. Please recheck these instructions if your new unit does not work properly. Should any component ever need service, please contact the factory. Do not disassemble the unit yourself — many are not user serviceable. Roemheld components incorporate advanced sealing technologies that eliminate the need for routine seal replacement.
TUBING: Use only steel tubing as specified in the Roemheld catalog: Seamless steel tubing, C1010, cold drawn, fully annealed, 5/16 OD, .065 wall thickness (Certified to 37,500 psi burst). Follow all tubing installation guidelines. We highly recommend the CLR-300-TL flaring tool to effectively flare this heavy-walled tubing.
HOSES: Use only hydraulic hoses as specified in the Roemheld catalog: 1/4 ID hydraulic hose, 30,000 psi min. burst pressure.
FLUID CONNECTIONS: Connect fluid lines to the 5/16 JIC 37° flare male connection on each clamp (two for double-acting clamps). This fitting accepts either 5/16 OD 37° flared tubing, or a hydraulic hose with 5/16 JIC 37° swivel nuts (female) at each end. Do not screw NPT pipe fittings into Roemheld Power Worholding components, or use NPT fittings anywhere in a workholding system. Roemheld fittings are 5/16 JIC 37°. These fittings offer a positive metal-to-metal seal. Do not use teflon tape or sealant. Do not use fitting sizes other than 5/16. This size is ideal for workholding fixtures. Smaller tube sizes have poor flow rates. Larger tube sizes are not readily available with sufficient wall thickness for high pressure operation, and are difficult to flare. Never use brass fittings.
OPERATING PRESSURE: Do not operate components above their maximum allowable fluid pressure stated in the Roemheld catalog (7500 psi for most components). Always use a gauge to monitor fluid pressure. Locate pressure gauge where the machine operator can easily read it. Often, placing it directly on the machining fixture is best. All Roemheld Electric and Air Power units include a fluid-pressure gauge.
ADDITIONAL SAFETY PRECAUTIONS: If losing fluid pressure (due to a cut hose, etc.) would pose any danger to the operator, install a pressure switch, or other pressure-monitoring device, to monitor system pressure.
This switch electrically signals the machine tool to shut down if fluid pressure is inadequate.
COMPONENT COMPATIBILITY: Do not mix non-Roemheld components into a Roemheld Power-Workholding Circuit. Other brands are not leakfree, and their performance may be unpredictable.
HYDRAULIC FLUID: Always use absolutely clean, fresh hydraulic fluid. Fill the fluid under absolutely clean conditions. Almost all service problems are caused by dirty, contaminated fluid. Fluid must be clean to 10 micron or better nominal filtration. Use only the following DIN 51524, HLP, ISO Grade fluids to preserve your warranty:
[as per DIN 51524]
Power units with poppet valves or single acting circuits
Mechanical pumps or double acting circuits|
BLEEDING AIR: Usually components will bleed trapped air automatically when you clamp and unclamp them several times. If manual bleeding is still necessary, bleed at an elevated tube or hose connection, farthest from the power source. With the clamps actuated (system pressurized) slightly loosen the connection. After fluid seeps out for a few seconds, retighten. Repeat at other connections if necessary. After bleeding, unclamp (depressurize system) and refill the power sources fluid reservoir.
FLOW CONTROL: When using Swing Clamps, Extending Clamps, or Fluid-Advanced Work Supports with a high-flow-rate power source, make sure the fluid flow rate to each component is under the maximum stated in the catalog. Otherwise the components may not activate properly. See the Roemheld catalog for flow control valves.
FLOOD COOLANT: Work supports and Swing Clamps have air vents protected by sintered-metal filters. These vents could draw in coolant if the components are submerged. To prevent this, attach an air vent tube via the tapped hole provided (see each component's catalog page for air-vent-fitting part numbers).
PRESS-TOOL CLAMPING: Clamping die sets on presses require different components and safety devices than found in our Roemheld Power Workholding catalog. Contact factory for press-tool clamping systems.
MOUNTING: Carefully follow mounting instructions as shown in the Roemheld catalog for each component.
CAUTION: ALWAYS KEEP HANDS CLEAR OF POWER CLAMPS DURING OPERATION. THESE COMPONENTS EXERT VERY HIGH FORCES AND CAN CAUSE SERIOUS INJURY. DISCONNECT POWER SOURCE BEFORE CONNECTING, DISCONNECTING, ADJUSTING, OR OTHERWISE HANDLING COMPONENTS.