Specifications subject to change without notice or incurring obligation 3 Longstroke ™ Cylinders 7-2-01 Male Rod Thread Option Single Rod -MR Double Rod, Rod End Only -MR Double Rod, Cap End Only -MR1 Double Rod, Rod & Cap Ends -MR2 A high strength stud is threaded into the standard female rod end and retained with Loctite ® . This method eliminates the small diameter thread relief area normally required when machining male threads. This provides a much stronger rod end which can be repaired, rather than replacing the complete rod, should the thread be damaged. Double Rod Option -DR Standard piston rod and rod bushing on both ends of the cylinder. Use when attachment to both ends of the cylinder is required, or to indicate piston position location. Also see Option –E on page 3.9. Rubber Bumpers Option Rod End only -BF Cap End only -BR Both Rod & Cap Ends -BFR BORE THREAD 2" 1/2–20 x 1.00 2 1/2" 1/2–20 x 1.00 3" 1/2–20 x 1.00 4" 5/8-18 x 1.25 Thread Rod Stud Loctite ® No Relief No Weakness Hydraulic Low Pressure Service to 500 psi non-shock Option -H A U Cup rod seal is placed inboard in an SAE 660 bronze bushing to eliminate leakage past the rod seal. An additional O'ring is used as an outboard wiper. Use with Air-Oil systems and low pressure hydraulic systems when the rigidity and precision smoothness of hydraulics and control is required. Viton Seals Option -V Use for elevated temperatures (–15° to + 400°F) or compatibility with exotic media. Consult engineering for compatibility information. Rubber Bumpers Option -BFR shown Standard rubber mass will compress and give full stoke at 60 to 80 psi.This mass can be adjusted to meet your specific pressure and/or dynamic load requirements. A rubber doughnut is bonded to the cylinder head to act as the piston stop and absorb the impact of the piston.This reduces noise and absorbs energy, thus reducing destruction of the cylinder and tooling due to pounding. The amount of rubber that extends beyond the normal piston stop is designed to compress and allow full stroke of the cylinder at 60 to 80 psi. If your application uses lower pressure or has high energy, consult engineering with application details so that rubber mass can be adjusted to meet your specific requirements. Because of the temperature limitations of the adhesives involved (-25° to + 220°F) Rubber Bumpers are available in cylinders with standard internally lubricated Buna-N seals only. Use to reduce noise and absorb impact. Note! On applications such as punching, shearing, setting blind rivets, etc. where high forces are built up and then released very quickly, the proper method of "CATCHING" this type of load is to adjust the cylinder piston and the tooling so that at the point of breakthrough the piston is very close to the bumper. This reduces the dynamic load that the piston and bumper are required to absorb. 3.7 .25 + stroke Typical for ALL bores and ALL mounting styles. Temperature Range (–25° to + 220°F) 3/8 NPT Ports Option -P38 Use 3/8 NPT ports for higher flows, air over oil systems, etc.