JTW-SERIES MACHINE SCREW JACKS - skin. Machine Screw Jack.pdf JTW-SERIES MACHINE SCREW JACKS * The worm

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  • JTW-SERIES MACHINE SCREW JACKS

    * The worm gear driven machine screw jack incorporates a heat treatment standard #45 steel worm which drives a high

    strength bronze worm gear. The worm shaft is supported on anti-friction deep groove ball bearings with external seals

    provided to prevent loss of lubrication. Lubrication with synthetic grease ep2 lithium grease. The bronze worm gear is

    supported on anti-friction ball thrust bearings. Rotation of the bronze worm gear causes the acme thread lifting screw to

    translate or rotate, depending upon jack configuration. The jack housing is made of ductile iron and proportioned to support

    the rate capacity of the unit. The lifting screw is made of standard #45 steel.

    * JTW-Series Machine Screw Jacks major configuration devides the jacks into translating machine screw jacks, lifting nut

    rotating machine screw jacks, anti-rotation keyed machine screw jacks, anti-backlash machine screw jacks, double clevis

    machine screw jacks etc. Upright and inverted type machine jacks. Standard lifting screw end types such as top flange (top

    plate), clevis end (male clevis), threaded end and plain end, also can custom to make kinds of lifting screw ends.

    * In the absence of vibration load, JTW-Series Machine Screw Jacks has self lock and precisely position loads, will hold

    loads without backdriving, and no need any brake mechanism or locking system. Lifting force from 0.5 ton to 100 ton. Linear

    speeds up to 2.875 m/min. Can be driven by motors, hand wheels or both together, 11 sizes in two gear ratios for high and

    slow linear speeds. Can be mounted in any attitude. Generally maintenance free.

    * JTW-Series Machine Screw Jacks are used wherever controlled lifting, lowering, pushing and pulling is required. They can

    be installed single unit, in pairs or multiple units machine screw jack lifting systems simultaneously lifting. Accessories such

    as electric motors, hand wheels, digital counters, flexible couplings, bevel gearboxes, bellows boots, limit switches, drive

    shafts, pillow blocks, flange blocks, stop nuts, gear motors, worm gear reducer, rod ends etc.

    * JTW-Series Machine Screw Jacks Application in metallurgy industry, mining industry, chemical industry, construction

    industry and irrigation industry such as Large dish antenna movement, Workplace table adjustments, Vacuum furnace lid

    lifters, Roll lifts, Mandrel pushers Sluice gates, Unwind stands, Calender stacks, Translating lift for pallets, Unstacking unit

    for plate materials, Mobile scissor table suitable for pallet truck transfer, Height adjustment in a bottle testing system,

    Adjustment of steel shuttering for concrete beams, Scissor table combination for exact height positioning of a platform, High

    voltage switch gear Die set tables, Electron beam adjustments, Horizontal presses, Saw blade tension, Stage lifts for

    scenery changes, Robotics manipulator, Disc refiner blade adjustment etc.

    J A C TO N IN D U S T RY C O. ,LT D TEL: 86-769-81585810, 81585852 SKYPE: jactonjack EMAIL: sales@screw-jack.com WEB: www.screw-jack.com

    L I F T I N G S Y S T E M S S O L U T I O N S

    S C R E W J A C K S M I T E R G E A R B O X E S

    L I F T I N G S Y S T E M S S Y S T E M S AC C E S S O R I E S

    C U S T O M S C R E W J A C K S C U S T O M A C M E S C R E W S

  • Specifications

    Model JTW-

    1T JTW- 2.5T

    JTW- 5T

    JTW- 10T

    JTW- 15T

    JTW- 20T

    JTW- 25T

    JTW- 35T

    JTW- 50T

    JTW- 100T

    Max. lifting force(ton) 1 2.5 5 10 15 20 25 35 50 100

    Max.pulling force(ton) 1 2.5 5 9.9 9.9 16.6 25 35 50 100

    Lift screw sizes (mm) 24x4 30x6 40x7 58x12 58x12 65x12 90x16 100x20 120x20 160x23

    Gear ratio (H) 6:1 6:1 6:1 8:1 8:1 8:1 32:3 32:3 32:3 12:1

    Lift screw travel (mm), per turn of input shaft (H)

    0.667 1 1.167 1.5 1.5 1.5 1.5 1.875 1.875 1.917

    Efficiency % (H) 21 23 21 20.5 20.5 19.5 16 18 15 13

    Gear ratio (L) 24:1 24:1 24:1 24:1 24:1 24:1 32:1 32:1 32:1 36:1

    Lift screw travel (mm), per turn of

    input shaft (L) 0.167 0.25 0.292 0.5 0.5 0.5 0.5 0.625 0.625 0.639

    Efficiency % (L) 13 11 11.5 13 13 12.8 9 11 11 10

    Idling torque (N.m) 0.29 0.62 1.4 2.0 2.6 3.9 9.8 16.5 19.6 39.2

    Max. length of lift screw (mm), when

    tensile force 1200 1500 2000 2500 2500 3000 3500 4000 5500 6500

    Max. permissible power (kw)

    0.25 0.55 1.1 2.6 2.6 3.7 4.8 6 7.5 15

    Lubricant (kg) 0.05 0.1 0.25 0.5 0.5 0.75 1.1 1.9 2.2 2.5

    Weight without stroke (kg)

    4 7.3 16.2 25 25 36 70.5 87 420 1010

    Weight of screw (kg), per 100 mm stroke

    0.3 0.45 0.82 1.67 1.67 2.15 4.15 5.2 7.45 13.6

    Remarks: 1. H: high ratio, L: low ratio 2. Max. allowable power is under the conditions that ambient temperature 20 degree C, duty cycle 20%h and input speed 1500rpm. 3. Efficiency is under grease lubrication. 4. Self-locking under static conditions.

  • JTW-1T Performance Tables (Lift Screw Tr24x4)

    Speed (rpm)

    Lift Speed (mm/min)

    F = 1Ton F = 0.8Ton F = 0.6Ton F = 0.4Ton H L H L H L H L

    6.6Nm 2.7Nm 5.3Nm 2.1Nm 4Nm 1.6Nm 2.7Nm 1Nm H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)

    1500 1000 250 1.00 0.40 0.80 0.32 0.60 0.24 0.40 0.16 1000 666.7 166.7 0.67 0.27 0.53 0.21 0.40 0.16 0.27 0.11 750 500 125 0.50 0.20 0.40 0.16 0.30 0.12 0.20 0.08 500 333.3 83.3 0.33 0.13 0.27 0.11 0.20 0.08 0.13 0.05 300 200 50 0.20 0.08 0.16 0.06 0.12 0.05 0.08 0.03 200 133.3 33.3 0.13 0.05 0.11 0.04 0.08 0.03 0.05 0.02 100 66.7 16.7 0.07 0.03 0.05 0.02 0.04 0.02 0.03 0.01 50 33.3 8.3 0.03 0.01 0.03 0.01 0.02 0.01 0.01 0.01

    Speed (rpm)

    Lift Speed (mm/min)

    F = 0.3Ton F = 0.2Ton F = 0.1Ton H L H L H L

    2Nm 0.8Nm 1.3Nm 0.53Nm 0.66Nm 0.27Nm H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW)

    1500 1000 250 0.30 0.12 0.20 0.08 0.10 0.04 1000 666.7 166.7 0.20 0.08 0.13 0.05 0.07 0.03 750 500 125 0.15 0.06 0.10 0.04 0.05 0.02 500 333.3 83.3 0.10 0.04 0.07 0.03 0.03 0.01 300 200 50 0.06 0.02 0.04 0.02 0.02 0.01 200 133.3 33.3 0.04 0.02 0.03 0.01 0.01 0.01 100 66.7 16.7 0.02 0.01 0.01 0.01 0.01 0.00 50 33.3 8.3 0.01 0.00 0.01 0.00 0.00 0.00

    JTW-2.5T Performance Tables (Lift Screw Tr30x6)

    Speed (rpm)

    Lift Speed (mm/min)

    F = 2.5Ton F = 2.0Ton F = 1.5Ton F = 1.0Ton H L H L H L H L

    18Nm 7.1Nm 14Nm 5.7Nm 11Nm 4.3Nm 6.9Nm 2.9Nm H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)

    1500 1500 375 2.70 1.20 2.20 0.89 1.70 0.67 1.10 0.45

    1000 1000 250 1.80 0.74 1.50 0.60 1.10 0.45 0.72 0.30

    750 750 187.5 1.40 0.56 1.10 0.45 0.82 0.33 0.54 0.22

    500 500 125 0.91 0.37 0.72 0.30 0.54 0.22 0.36 0.15

    300 300 75 0.54 0.22 0.43 0.18 0.33 0.13 0.22 0.09

    200 200 50 0.36 0.15 0.29 0.12 0.22 0.09 0.14 0.06

    100 100 25 0.18 0.07 0.14 0.06 0.11 0.05 0.07 0.05

    50 50 12.5 0.09 0.05 0.07 0.05 0.05 0.05 0.05 0.05

    Speed (rpm)

    Lift Speed (mm/min)

    F = 0.5Ton F = 0.25Ton F = 0.1Ton H L H L H L

    3.5Nm 1.4Nm 1.7Nm 0.71Nm 0.7Nm 0.28Nm H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW)

    1500 1500 375 0.54 0.22 0.27 0.11 0.11 0.05

    1000 1000 250 0.36 0.15 0.18 0.07 0.07 0.05

    750 750 187.5 0.27 0.11 0.14 0.06 0.05 0.05

    500 500 125 0.18 0.07 0.09 0.05 0.05 0.05

    300 300 75 0.11 0.05 0.05 0.05 0.05 0.05

    200 200 50 0.07 0.05 0.05 0.05 0.05 0.05

    100 100 25 0.05 0.05 0.05 0.05 0.05 0.05

    50 50 12.5 0.05 0.05 0.05 0.05 0.05 0.05

  • JTW-5T Performance Tables (Lift Screw Tr40x7)

    Speed (rpm)

    Lift Speed (mm/min)

    F = 5Ton F = 4Ton F = 3Ton F = 2Ton H L H L H L H L

    44.2Nm 19.3Nm 35.4Nm 15.5Nm 26.5Nm 11.6Nm 17.7Nm 7.7Nm H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)

    1500 1750 437.5 6.90 3.00 5.60 2.40 4.20 1.80 2.80 1.20 1000 1167 291.7 4.60 2.00 3.70 1.60 2.80 1.20 1.90 0.80 750 875 218.8 3.50 1.50 2.80 1.20 2.10 0.90 1.40 0.60 500 583 145.8 2.30 1.00 1.90 0.80 1.40 0.60 0.90 0.40 300 350 87.5 1.40 0.60 1.10 0.50 0.80 0.40 0.60 0.20 200 233 58.3 0.90 0.40 0.70 0.30 0.60 0.20 0.40 0.20 100 117 29.2 0.50 0.20 0.40 0.20 0.30 0.10 0.20 0.10 50 58 14.6 0.20 0.10 0.20 0.10 0.10 0.10 0.10 0.10

    Speed (rpm)

    Lift Speed (mm/min)

    F = 1Ton F = 0.5Ton F = 0.25Ton H L H L H L

    8.8Nm 3.9Nm 4.4Nm 1.9Nm 2.2Nm 1.0Nm H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW)

    1500 1750 437.5 1.40 0.60 0.70 0.30 0.30 0.20 1000 1167 291.7 0.90 0.40 0.50 0.20 0.20 0.10 750 875 218.8 0.70 0.30 0.30 0.20 0.20 0.10 500 583 145.8 0.50 0.20 0.20 0.10 0.10 0.10 300 350 87.5 0.30 0.10 0.10 0.10 0.10 0.10 200 233 58.3 0.20 0.10 0.10 0.10 0.10 0.10 100 117 29.2 0.10 0.10 0.10 0.10 0.10 0.10 50 58 14.6 0.10 0.10 0.10 0.10 0.10 0.10

    JTW-10T Performance Tables (Lift Screw Tr58x12)

    Speed (rpm)

    Lift Speed (mm/min)

    F = 10Ton F = 8Ton F = 6Ton F = 4Ton H L H L H L H L

    108Nm 53Nm 87Nm 43Nm 65Nm 32Nm 44Nm 22Nm H: 1/8 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)

    1500 2250 750 17.00 8.30 14.00 6.70 11.00 5.00 6.80 3.30

    1000 1500 500 12.00 5.60 9.10 4.40 6.80 3.30 4.50 2.20

    750 1125 375 8.50 4.20 6.80 3.30 5.10 2.50 3.40 1.70

    500 750 250 5.70 2.80 4.50 2.20 3.40 1.70 2.30 1.10

    300 450 150 3.40 1.70 2.70 1.30 2.00 1.00 1.40 0.70

    200 300 100 2.30 1.10 1