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Round Head and Square Head Tie Rod Cylinders

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Round Head and Square Head Tie Rod Cylinders 3 S521 X 7-MR 521 X 7 Round Head and Square Head Tie Rod Cylinders Page Features & Benefi ts ..................................................................................... 3.2 General, Standard Ratings ..........................................................................3.2 Construction Information ............................................................................. 3.3 How a Longstroke™ is built Model Number Chart ...................................................................................3.4 How to Order Option List ................................................................................................... 3.4 Standard Specifi cations ...............................................................................3.5 - 3.6 Option Specifi cations ...................................................................................3.7 - 3.9 Description of the Options Mounting Kits ..............................................................................................3.10 Accessories ................................................................................................ 3.10 Air Spring Return .........................................................................................1.15 Position Sensors ..........................................................................................3.9 Directional Control Valves ............................................................................Section 11 Port Mounted Flow Control Valves ............................................................... Section 12 Specials .......................................................................................................ii & iii 2 Year Warranty ........................................................................................... Inside back cover 3.1 Specifi cations subject to change without notice or incurring obligation 5-9-13 Longstroke™ Cylinders Available in 2 styles Piston Rod Bushing, anodized aluminum 4 Bore sizes 2" thru 4" housing with Tefl on® lined Duralon® insert Strokes to 12" 3 Piston Seal, internally lubricated O'Ring for long life and improved performance Groove for magnetic piston position sensing PTFE Bearing Strip is located away from rod bearing for maximum load support Round Head Style Duralon® Rod Bearings Excel Load Capacity (psi) Friction Properties Machine Design 1972/73 Slip- Bearing Reference Issue Coefficient stick Porous Bronze .............. 4,500 Steel-on-steel .................... .50 Yes Porous iron ................... 8,000 Bronze-on-steel ................ .35 Yes Phenolics ...................... 6,000 Sintered Bronze-on-steel Nylon® ......................... 1,000 with mineral oil ...... .13 No TFE............................... 500 Bronze-on-steel Reinforced Telfon® ..... 2,500 with mineral oil ....... .16 No *TFE fabric ................... 60,000 Copper lead alloy-on-steel .22 Yes Polycarbonate ............... 1,000 Acetal-on-steel ................. .20 No Acetal ........................... 1,000 Nylon-on-steel ................. .32 Yes Carbon-graphite ........... 600 Duralon-on-steel .............. .05 - .16 No Square Head Style * Shows Duralon bearing classification. Not to be used for design purposes. Printed with permission by Rexnord Corp. Ratings – Standard Units all series • Double acting, single rod • Media . .Air • Duralon® rod bushing • Max. operating pressure . 250 psi • Female rod end with wrench fl ats • Min. operating pressure recommended . 15 psi • Internally lubricated Buna-N O-ring • Ambient & media temperature range . -25° to +250°F piston and rod seals. • Prelubrication . Magnalube®–G Grease • Ports at position #1 • Stroke tolerance . ± 1/64" • Optional – Hydraulic . 500 psi nonshock Sizing Guide Bore Diameter 2" 2-1/2" 3" 4" Rod Diameter 0.75 0.75 0.75 0.88 Rod Area 0.44 0.44 0.44 0.79 Push Area (Single Rod) 3.14 4.91 7.07 12.57 Pull Area 2.70 4.47 6.63 11.97 Round Head Base Weight, lb. 2.21 2.83 3.66 5.98 Square Head Weight, lb. 2.34 3.08 3.27 5.20 Weight Per Inch, lb. 0.18 0.21 0.23 0.34 4-0-08 Specifi cations subject to change without notice or incurring obligation 3.2 Longstroke™ Cylinders Standard Models Basic Construction Quick Reference to Components Standard: Single Rod, Double Acting No. Description 1 4 4 18 17 11 13 15 14 1 Rod End Head, aluminum, black anodized 2 Cap End Head, aluminum, black anodized 3 3 5 3 Recessed faces assure fl at mounting 4 1/4 NPT Ports 8 5 Full fl ow porting for fast response 12 6 Piston Rod Bushing, anodized aluminum housing with Tefl on® lined Duralon® insert 3 6 7 Piston Stop 8 Rod Seal, internally lubricated O'Ring for long life 16 21 9 Piston Rod, stainless steel, centerless ground, polished, and hard chrome plated (68-72Rc) 20 19 7 9 16 10 2 10 Piston, aluminum 11 Counter bore locates piston rod to maintain precise concentricity 12 Piston Bolt, steel, Loctited® and torqued Option -DR: Double Rod, see page 3.7 13 Piston Seal, internally lubricated O'Ring for long life and improved performance 1 4 4 18 17 11 13 15 14 14 PTFE Bearing Strip is located away from rod 5 bearing for maximum load support 3 3 15 Groove for magnet to activate position sensors 16 O'Ring bumpers reduce metallic slap of piston on 22 8 piston stop for quiet operation 17 Cylinder Tube, aluminum 8 Hard anodized ID (Rc60); Clear anodized OD 6 9 18 Cylinder Tube end seal 6 21 19 Stainless steel tie rods 16 20 Stainless steel hex nuts 20 19 7 9 16 10 2 21 Counterbore for nuts assures fl at mounting 22 Steel double rod stud, Loctited® and torqued 23 Guide pin, precision ground tool steel 24 Guide pin bushing, SAE 660 bearing bronze Option -K: Nonrotating, see page 3.8 25 Guide pin seal, Urethane O'Ring 26 Rubber disk prevents guide pin movement 1 18 23 17 11 13 15 14 Cylinder OD – is clear anodized aluminum for corrosion 26 resistance and an attractive appearance. 3 The Bore ID is Hard Anodized – Hard anodizing is an electrochemical process which provides a very dense 12 8 surface of aluminum oxide that actually impregnates the base aluminum. It forms an extremely hard (60 Rc) surface with a low coeffi cient of friction. Hardness, corrosion 3 resistance and wear resistance exceeds that of chrome 6 plated steel. 16 21 An Extra Long Rod Bearing – provides long and rigid 25 ® 2 support for the piston rod. The bearing material is Duralon 20 19 7 9 16 10 on all bore sizes. See page 3.2 for a chart comparing the exceptional physical properties of Duralon® to other common, though less durable, bearing materials. 24 The Piston Rod – is Hard Chrome Plated Stainless Steel. The standard rod end is fi ne female thread tapped and has long wrench fl ats. 3.3 Specifi cations subject to change without notice or incurring obligation 4-1-08 How to Order Model Number Code 321 X 8 – MR Series Bore Specify Stroke Options 2" 321 Standard strokes: Description Specify See Page 2-1/2" 521 1" Increments Double Rod -DR 3.7 3 Round head 3" 721 4" minimum Nonrotating, Square Head only -K 3.8 150 psi max. operating pressure 4" 1221 through 12" maximum Male Rod Thread 3.7 Single Rod -MR 2" S321 Double Rod, Rod End -MR Square head Optional Strokes: 2-1/2" S521 Shorter and Double Rod, Cap End -MR1 Double Rod, Both Ends -MR2 3" S721 fractional 4" S1221 Viton Seals (-15° to +400°F) -V 3.7 Hydraulic, Low Pressure -H 3.7 to 500 psi NONSHOCK Finish, Pro-Coat™ , Mounting Electroless Nickel -N 3.8 Rubber Bumpers 3.7 Rod end face, round head only . .Standard Rod End -BF Cap end face, round head only . .Standard Cap End -BR Both Ends -BFR Side tap, square head only . .Standard Adjustable Extend Stroke -AS 3.8 Cap end clevis, round head only 6" Stroke maximum Ports in line with slot . .PM Full stroke adjustment is standard Ports 90° to slot . .SM 3/8 NPT Ports -P38 3.7 Extended tie rods Port Positions 3.5 & 3.6 Rod end only . .WF All Ports Position #1 Standard Cap end only . .WR Position #2 -PA2 Rod & Cap end . .WFR Position #3 -PA3 Position #4 -PA4 Rod End Position #1 Standard Mounting Kits for Square Head Series Position #2 -PR2 Type See page Position #3 -PR3 End Lug mount kit 3.10 Position #4 -PR4 Cap End Position #1 Standard Side Lug mount kit 3.10 Position #2 -PC2 Position #3 -PC3 Position #4 -PC4 Mounting Kits for Round Head Series Any port not specifi ed will be in Position #1 Type See page as shown on page 3.5 & 3.6 Eye bracket kit 3.10 Magnetic Piston -E 3.9 for reed switches and Electronic Sensors Rod clevis 3.10 (Order Sensors separately) How to Order Examples 1. Specify code for Series and Bore. 321 X 8 - MR 2. Specify stroke Round Head Longstroke, 2" bore, 8" stroke, Note standard strokes listed above. Standard Mount – Face Mount on Rod End and Any stroke not listed is available, Cap End, Male Rod Thread to 12" maximum, at nominal increase in delivery time and cost. S721 X 7 - E 3. Specify mounting if other than standard Square Head Longstroke, 3" bore, 7" stroke, 4. Specify options Standard Mount – Side Tap Mount, Magnetic Piston 5-22-13 Specifi cations subject to change without notice or incurring obligation 3.4 Longstroke™Cylinders Round Head, Standard, Face Mount Rod and Cap End 3.38" + Stroke 2.13" + Stroke K Female 0.50 0.50 30° 22.5° 21.5° Rod Thread 1/4 NPT 1/4 NPT 90° 1 1/2" Hex Nut 1 1 1 4 4 4 5.00 BC 2.81 BC 3.25 BC 3.81 BC 3 F Rod Dia. 2 3 2 2 2 3 3 3 .33 Dia. .33 Dia. .33 Dia. .33 Dia. H 0.25 A 1.00 1.00 2" Bore2-1/2" Bore 3" Bore 4" Bore Rod End Cap End Extended Tie Rod Mount for Round Head Models 5/16-24 Thread Specify mounting option Z Z Rod End Cap End Rod End Only WF Cap End Only WR Rod and Cap Ends WFR BC BC WF WR 2" Bore 2-1/2",
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