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bending moment applied to the piston rod side.Note 2) At 0.5 MPa.Note 3) Direction of rotation viewed from the rod side when the piston rod is retracting.Note 4) Refer to "Rotary angle" diagram.MQRHCTheoretical ForceBore size(mm)Unit: NOperating pressure (MPa)Rod dia. Operating Piston area(mm)direction(cm2)0.30.50.71.0R260.8100139200H390.2149208298R3.7112185258370H4.9149245341490R6182300418600H8243400557800R10.53195257311050H12.53806258701250R16.550282511491648H19.659698013651961R28851140019502801H31.2948156021723121201225123216401650206320Note) Theoretical force (N)=Pressure (MPa) X Piston area (cm2) X 100Refer to the p.5.4-1 regarding made toorder for series MK2.RECNon-lubePort sizeMade to OrderREWithout auto switch –10 to +70°C (No freezing)Ambient and fluid temperatureMK/MK2RS1.5MPaProof pressureOrdeerMad1910·20Allowable moment Nm (1)Rotary Angle63R: Clockwise L: CounterclockwiseRotary stroke (mm)Head sideflange5090° ± 10°Rotary angle (4)With arm40Double actingOperationOperation direction R: Rod side (Clamp)H: Head side (Release)Weight/MountingClamp stroke(mm)102050Unit: gBore size (mm)2025324050260295353635——30033555568011701620————14201890Additional WeightUnit: g202532405023571325With arm100100200200350350Rear flange133153166198345531Bore size (mm)Rear boss mounting63Calculation method (Example) MK2G20-10RFN Standard calculation: MK2B20-10R Extra weight calculation: Rear flangeRear boss mountingWith arm63260g133g2g100g495g4.1-15CCSeriesMK2ConstructionWith arm (N)MK220, 25!6!7!5!8!9MK232Auto switchy !2 @4 o @7 r i !1 t q @6u !0 @5 w eRear boss mounting (F)@0@3@9 #0!3MK240 to 63Rear flange (G)!4@1@2@8Component PartsNo.qwertyuio!0!1!2!3!4!5!6Component PartsDescriptionNoteMaterialAluminum alloyRod coverAluminum alloyCylinder tubePistonAluminum alloyBushingCopper bearing materialOnly ø32 to ø63Guide pinStainless steelPiston rodStainless steelBumperUrethaneOnly ø20 to ø32Ring nutCopper alloyScraper pressureStainless steelMagnetHex.
socket head cap screw Chrome molybdenum steel Sharp end section: 90°R-shape snap ringSpring steelPlateAluminumOnly ø40 to ø53C type retaining ringCarbon tool steelArmRolled steelClamp boltChrome molybdenum steelNo.!7!8!9@0@1DescriptionMaterialHexagonal nutRolled steelHex. socket head cap bolt Chrome molybdenum steelSpring washerHard steelBoss mount ringAluminum alloyFlangeRolled steel@2Hex.
socket head cap bolt Chrome molybdenum steel Quantity@3@4@5@6@7@8@9#0O ringCoil scraperPiston sealGasketRod sealParallel pinWear ringBumper BReplacement Parts: Seal KitsBore size (mm)Part No.Contentsø20ø25Not disassembledø32ø40MK2-40-PSSet of above @3 @4 @5 @6 @7∗Seal kit includes O ring @3, coil scraper @4, piston seal @5, gasket @6 and rod seal @7.Order a seal kit according to applicable bore size.4.1-16ø50MK2-50-PSø63MK2-63-PSNBRPhosphor bronzeNBRNBRNBRStainless steelResinUrethaneNoteø20, 25: 2ø32 to 63: 4Rotary Clamp Cylinder/Heavy DutyPrecautionsBe sure to read before handling.Refer to p.0-39 to 0-46 for SafetyInstructions and commonprecautions on the productsmentioned in this catalog.SeriesMK2Precautions for Designing and Mounting ArmsWhen arms are to be made separately, their length and weight should be within the following range.1.
Allowable bending momentUse the arm length and operating pressure within graph 1 for allowable bendingmoment loaded piston rod.Graph 1Caution20HandlinglMK250/63MK/MK2MK232/4010Mounting bolt for MK2BWhen arm length is 8cm, pressure should beless thanMK220/25: 0.45MPaMK232/40: 0.55MPaMK250/63: 0.8MPa64OperatingrangeMounting bolt0.45 0.550.20.40.6Operating pressure (MPa)RHC0.81CC2. Moment of inertiaGraph 23MK250/632MK2B20-10MK2B20-20MK2B25-10MK2B25-20MK2B32-10MK2B32-20MK2B40-10MK2B40-20MK2B50-20MK2B50-50MK2B63-20MK2B63-50C8.510.510610.510.59D75858090901008090105135105135Mounting boltM5 X 75lM5 X 85lM5 X 80lM5 X 90lM5 X 90lM5 X 100lM5 X 80lM5 X 90lM6 X 105lM6 X 135lM8 X 105lM8 X 135l10–2Moment of inertia (kg·m2)Part No.C..XMTSWhen the arm is long and heavy, damage of internal parts may be caused due to inertia.Use the inertia moment and cylinder speed within graph 2 based on arm requirements.Note) Be sure to use a flat washer to mountcylinders via through holes.RECMQ0.1Flat washerREC..SExample) M5 X 75 l (MK2B)CMK220/252Mounting method: A through hole mounting boltis available.How to order: Suffix “(MK2B)” to the size ofbolts to be used.DRS8Arm length l (cm)q Mount the cylinder so that the clampingpiston will be approximately in the centre ofthe clamp stroke.w The auto switch is temporarily mounted forshipment, so adjust its position whenmounting the cylinder.
(See the auto switchmounting position on p.4.1-20.)e Do not apply clamping and other loads whenthe piston rod is turning.MK232/40When arm's moment of inertia is5 X 10–3kg/m2, cylinder speed shouldbe less thanMK232/40: 66mm/sMK250/63: 120mm/sRefer to p.4.1-21 for calculating moment ofinertia.64MK220/25210–364Operatingrange210–46612050100Cylinder speed (mm/s)200To attach and detach the arm to and from thepiston rod, fix the arm with a wrench or vise andthen tighten the bolt. (Excessive force in thedirection of rotation applied to the piston rodmay damage the internal mechanism.)Refer to the following table for the tighteningtorque for mounting.Bore size (mm)20, 2532, 4050, 63NmStandard tightening torque4 to 68 to 1014 to 16AllenwrenchWrenchArm4.1-17SeriesMK2ø20, ø25+0.152–ø6.3 +0.05(Knock pin hole)Note: Actuators are drawn/shown in theirretractesor clamping position.2-M6 X 1 (Special cap bolt)2–ø6.624.5 + Clamp strokeøAh93251AD14J + Clamp strokeC72822–(0 to 10)B16M6 X 1.0With armRear flangeModelARear boss mountingCBDModelMK220-FMK225-FMK2G20 60 39 25.5 ±0.1 48±0.15MK2G25 64 42 28 ±0.1 52 ±0.15øAh9013 –0.043015 –0.043Auto switchMinimum bendingradius of lead wire 10In case of connector22E)(2GDøHh91110 –0.1–0.22-M5 X 0.8(ø5.5)FL)(2Eø12M8 X 1.25Effective threaddepth 11K5.5J + Clamp strokeBI + 2 X Clamp strokeF4 3C+0.152–ø3.3 +0.05depth 3M6 X 1G173AThrough hole & both ends tapped (standard)ModelA BCDEFGøHh9KL0MK2B20 36 46.8 36 48 24.5 13.5 ±0.15 7.5 ±0.15 20 –0.05275.5 62.5 314MK2B25 40 52 40 53.8 27.5 16±0.15IJ8 ±0.15 23 –0.052 78.5 65.5 320Note 1) Above figure is for D-A73, A80Note 2) Dimensions E and F are 7mm longer for the auto switches withconnector (D-A7C, A80C, J79C).Note 3) When the rod is extended, the clamp stroke and rotary stroke areadded to the appropriate dimensions.4.1-1852-ø5.5 through2 X 2–ø9 depth 7counter bore 3Rotary Clamp Cylinder/Heavy DutyMK2Seriesø32, ø40, ø50, ø63MK/MK2RSRERECModelAMK2G32MK2G40MK2G50MK2G63C..XWith armRear flangeB8 658 729 899 108CDEøFG4854678034 ±0.140 ±0.150 ±0.160 ±0.156 ±0.1562 ±0.1576 ±0.1592 ±0.155.55.56.69M6 X 1.0M6 X 1.0M8 X 1.25M10 X 1.5ModelMK232-NMK240-NMK250-NMK263-NABCDEFG1818222267678888202022224545656539465857.525254040M8 X 1.25M8 X 1.25M10 X 1.5M10 X 1.5MTSC..SMQRHCCCRear boss mountingNote 1) Below figure is for D-A73, A80.Note 2) Dimensions E and F are 7mm longer for the auto switcheswith connector (D-A7C, A80C, J79C).ModelMK232-FMK240-FMK2 5063 -FøAh9021 –0.052028 –0.052035 –0.062Through hole & both ends tapped (standard)ModelMK2B32MK2B40MK2B50MK2B63A B45526477606986103CDE3440506014 –0.1–0.214 –0.1–0.217 –0.1–0.217 –0.1–0.254617386F øG31.5354147.55.55.56.69øHI9 Depth 7 M10 X 1.59 Depth 7 M10 X 1.511 Depth 8 M12 X 1.7514 Depth 10.5 M12 X 1.75JKLMN1212151520 ±0.1524 ±0.1530 ±0.1535 ±0.157 ±0.157 ±0.158 ±0.159 ±0.15M6 X 1.0M6 X 1.0M8 X 1.25M10 X 1.517172228.5OPQRS14 4.5 101.5 76 3714 5 102.5 70 29.519 7 122 81.5 3419 7 125 85 35T øU7.5810.510.516162020VXøYh9Z1/81/81/41/4333.53.5030 –0.62030 –0.62037 –0.62048 –0.626.56.57.57.5Note 1) This cylinder rod is retracted.Note 2) Rotation direction is in the retracted direction from the rod side.Note 3) When the rod is extended, the clamp stroke and rotary stroke are added to the appropriate dimensions.4.1-19MK2SeriesAuto Switch Specifications (ø20 to ø63)Refer to the p.5.3-2 for details of auto switch.Applicable Auto SwitchElectrical entry (Function)Solid state switchReed switchStyle Auto switch modelD-A7, A8D-A7쏔H, A80HD-A73C, A80CD-A79WD-A9쏔D-A9쏔VD-F7쏔, J79D-F7쏔VD-J79CD-F7쏔W, J79WD-F7쏔WVD-F7BALD-F7쏔FD-F7NTLD-F9쏔D-F9쏔VD-F9쏔WD-F9쏔WVD-F9BALD-P5DWLBore sizePage5.3-14Grommet (Perpendicular)Grommet (In-line)ø20 to ø63Grommet (Connector)5.3-155.3-165.3-26Grommet (2 colour indication, Perpendicular)Grommet (In-line)ø32, ø63Grommet (Perpendicular)5.3-195.3-20Grommet (In-line)5.3-34Grommet (Perpendicular)5.3-35Grommet (Connector)5.3-36Grommet (2 colour indication, in-line)Grommet (2 colour indication, Perpendicular)ø20 to ø635.3-445.3-45Grommet (2 colour, water resistant, in-line)5.3-57Grommet (2 colour, diagnostic output, in-line)5.3-53Grommet (With timer, in-line)5.3-60Grommet (In-line)5.3-395.3-39Grommet (Perpendicular)ø32, ø63Grommet (2 colour indication, in-line)5.3-67Grommet (2 colour, water resistant, in-line)Grommet (2 colour, strong magnetic field resistant, in-line)5.3-665.3-66Grommet (2 colour indication, Perpendicular)ø40 to ø635.3-64Auto Switch Mounting Position (Stroke end)ø20, ø25ø32 to ø63MountingModelMK2쏔20MK2쏔25MK2쏔32MK2쏔40MK2쏔50MK2쏔63ø32 to ø63Rail mountingD-A7, A8A28.52932.523.52828.5B66.510.513.516.519.5A2929.5332428.529B6.5711141720A2626.5302125.526Direct mountingD-F7BAD-F7쏔WD-F7쏔FD-J79WD-F7쏔WVD-A7쏔H, A80HD-A73C, A80C D-A79WD-F7쏔, J79D-F7쏔V, J79CB3.548111417A3333.5372832.533B10.51115182124D-P5DWA–––19.52424.5B–––9.512.515.5D-A9쏔D-A9쏔VA––31.522.52727.5B––9.512.515.518.5D-F9쏔WD-F9쏔WVD-F9BALD-F9쏔D-F9쏔VA––35.526.53131.5B––13.516.519.522.5A––34.525.53030.5B––12.515.518.521.5Auto Switch Mounting Bracket Part No.Bore size(mm)Mountingbracket No.20/25BQ-132/4050/63BQ-240/5063BQP1-050Note쐌 Auto switch mounting screw(M3 X 0.5 X 8l)쐌Square nut쐌Auto switch mounting screw(M3 X 0.5 X 10l)쐌Auto switch spacer쐌Auto switch mounting nut쐌Switch mounting bracket쐌Auto switch mounting nut쐌Cross-recessed panhead small screw(M3 X 0.5 X 16l)쐌Hexagon socket head cap bolt(M3 X 0.5 X 14l)Reed switchApplicable auto switchSolid state switchD-A7, A8D-A73C, A80CD-A7쏔H, A80HD-A79WD-F7쏔, J79, D-F7쏔VD-J79CD-F7쏔W, J79W, D-F7쏔WVD-F7BAL, D-F7쏔F, D-F7NTLD-P5DWThe set of stainless steel mounting screws (with nuts) described below is available and can be used depending on the operating environment.(The spacers for auto switches must be ordered separately, as they are not included.)BBA2: For D-A7/A8/F7/J7 typesThe stainless steel screws described above are used when the D-F7BAL switch is shipped mounted on to the cylinder.When the switches are shipped as individual parts, the BBA2 set is included.4.1-20Rotary Clamp Cylinder/Heavy DutySeriesMK2Caution/Precautions for HandlingBe sure to read before handling.When equipped with strong magneticresistant auto switch D-P5DWLRefer to p.0.44 to 0-46 for common auto switch precautions.If welding cables or welding gun electrodes arein the vicinity of the cylinder, the magnets in thecylinder could be affected by the externalmagnetic fields.
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