Hydraulic cylinder Tie Rod Design - imperial - Duncan Rogers

SPECIAL VARIATIONSMany cylinders are manufacturedwith variations to meet specialcustomer needs. In addition tothose illustrated below, some ofthe more popular variations are:■ Cylinders With Gaiters■ Combination Mount Cylinders■ Locking Cylinders■ Precision Stroke Cylinders■ Precision Mount Cylinders■ Cylinders With Built-In Switch■ Actuators & Feed Back DevicesThrust KeyThrust keys should be considered for heavyloads or high shock conditions on all sidemounted cylinders (styles SF, FB, EL and SL).Thrust keys are available in bore sizes 1 1 /8”through 6”. Extending the rod glandr e t a i n e r, as shown, provides a key whichfits into a milled slot in the mountingsurface of the machine member. Combinedwith the mount this key assures that thecylinder will not shift in severe service.Spherical BearingsB o r e F A F K F F1 1 / 8 . 3 1 2 0 3 / 16 1 / 21 1 / 2 . 3 1 2 0 3 / 16 5 / 82 . 5 6 2 0 5 / 16 3 / 42 1 / 2 . 5 6 2 0 5 / 16 3 / 43 1 / 4 . 6 8 7 0 3 / 8 3 / 44 . 8 1 2 0 7 / 16 7 / 85 . 8 1 2 0 7 / 16 7 / 86 . 9 3 7 0 1 / 2 1Pivot mounting brackets and pivot rod eyescan be provided with spherical bearings tocompensate for misalignment on bothends of cylinders. Consider also the use ofthe Uni-Lign described on page 8.Non-Rotating Piston RodTwo methods of non-rotating piston rodsare employed. The internal rod type (Fig. A. )is generally used since it requires lessspace and is neater. The type shown inFig. B. must be used on small borecylinders where internal space is limited.Fig. AFig. BRod Gland DrainWhen not even a drop of external leakagecan be tolerated, the rod gland drain backprovides a signal that the rod seal set hasworn to the point of replacement - withoutthe danger of contamination from leakage.Tandem Cylinders andMulti-Stage CylindersThe tandem cylinder (Fig. C.) has twopistons connected to a common rod,resulting in twice the force output of asingle cylinder. Multi-stage cylinders (Fig. D)offer multiple, positive strokes bypressurising one cylinder, the other, or both.Contact the factory for other variations.Vacuum Rod SealWhen a cylinder is to be operated underwater, provision is made to prevent thewater from being drawn into the cylinderat the time of valve shift or pressuredifferential.Subsea CylindersSubsea cylinders can be offered with achoice of rod and external treatments.Please discuss your application with ourfactory.Stainless Steel Piston RodsMany applications, especially thosesubjected to water spray, require the useof stainless steel piston rods. We stock431-S29T hard chrome plated, stainlesssteel and will furnish that type unlessotherwise specified. Other types ofstainless steel can be provided on request.Limit Switch CylindersMechanically operated switches areavailable on square head cylinders Pleaserequest brochure.Feedback CylindersCylinders can be supplied with variousfeedback devices either internally orexternally. Consult factory.PLEASE REQUEST A QUOTATION FOR ANYSPECIAL CYLINDER REQUIREMENTS.SEE PAGES 4 AND 5 FOR INFORMATIONCONCERNING HlGH TEMPERATURE ANDWATER HYDRAULIC CYLINDERSAdjustable StrokeShown is an integral stroke adjustment(externally adjusted) that is accomplished bythe use of a bump rod threaded into thecylinder cap. Seals are incorporated to preventexternal leakage and a lock nut is included.Fig. CFig. D15