The document describes JTC-Series cubic screw jacks. It provides details on their components, configurations, performance specifications, and applications. Key features include worm gear driven trapezoidal lead screws, ball bearings and seals, ductile iron housings, and self-locking capabilities without the need for brakes. They are used wherever controlled lifting, lowering, pushing and pulling is required in various industrial machinery and processes.

1. JTC-SERIES CUBIC SCREW JACKS
* The worm gear driven trapezoidal lead 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 trapezoidal 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.
* JTC-Series Cubic Screw Jacks major configuration devides the jacks into translating screw jacks, lifting nut rotating screw
jacks, anti-rotation keyed screw jacks, anti-backlash screw jacks, double clevis screw jacks etc. Upright and inverted type
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, JTC-Series Cubic 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 2.5 kN to 500 kN. Linear
speeds up to 1.5 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.
* JTC-Series Cubic Screw Jacks are used wherever controlled lifting, lowering, pushing and pulling is required. They can be
installed single unit, in pairs or multiple units screw jack lifting systems simultaneously lifting. Accessories such as electric
motors, hand wheels, digital counters, flex couplings, bevel gearboxes, bellow boots, limit switches, drive shafts, pillow
blocks, flange blocks, stop nuts, gear motors, worm gear reducer, rod ends etc.
* JTC-Series Cubic Screw Jacks Application in spray infeed conveyor lift system, theatre stage lifting platform, solar tracker,
satellite dish antenna azimuth, raising sluice gate, screw scissor lift table, Air dampers, Low temperature valve operators,
Drive wheel adjustment to change conveyor flow stops, Conveyor lifts, diverters, Knife blade filter drum skimmer, Furnace
combustion gun adjustment, synchronized lifting system, food processing oven lifts system, feeder leveler, roller
adjustment, tunnel ventilation damper adjustment, postform roller elevation, car lifting trolley, extrusion machine, roller
Laminating machine, complete mineral wool processing machinery, sandwich panel handling machinery, vintage industrial
crank desk and anywhere required raising, lowering, pulling, pushing and rolling linear motions.
JA CTO N IND US TRY CO ., LTD
TEL: 86-769-81585810, 81585852
SKYPE: jactonjack
EMAIL: sales@jactonjack.com
WEB: www.jacton-screwjacks.com
LI F T I N G SY S T E M S SO L U T I O NS
SC R E W JA C K S
BE V E L GE A R B O X E S
LI FT I N G SY S TE M S
SY S TE M S AC C E S S O R I E S
CU S TOM SC R E W JA C K S
CU S TOM AC M E SC R E W S

5. Model Performance Tables
JTC2.5
Tr14x4
Speed
(rpm)
Lift Speed
(mm/min)
F = 2.5kN F = 2kN F = 1.5kN F = 0.5kN
H L H L H L H L
1.20Nm 0.40Nm 0.90Nm 0.30Nm 0.70Nm 0.20Nm 0.20Nm 0.10Nm
H: 1/5 L: 1/20 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1200 300 0.18 0.10 0.15 0.10 0.10 0.10 0.10 0.10
1000 800 200 0.12 0.10 0.10 0.10 0.10 0.10 0.10 0.10
750 600 150 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10
500 400 100 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10
JTC5
Tr18x4
Speed
(rpm)
Lift Speed
(mm/min)
F = 5kN F = 4kN F = 2kN F = 1kN
H L H L H L H L
2.61Nm 0.83Nm 2.09Nm 0.67Nm 1.07Nm 0.35Nm 0.55Nm 0.19Nm
H: 1/5 L: 1/20 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1200 300 0.41 0.13 0.33 0.10 0.17 0.05 0.09 0.03
1000 800 200 0.27 0.09 0.22 0.07 0.11 0.04 0.06 0.02
750 600 150 0.20 0.06 0.16 0.05 0.08 0.03 0.04 0.01
500 400 100 0.14 0.04 0.10 0.03 0.06 0.02 0.03 0.01
JTC10
Tr20x4
Speed
(rpm)
Lift Speed
(mm/min)
F = 10kN F = 5kN F = 4kN F = 2kN
H L H L H L H L
5.6Nm 1.83Nm 2.86Nm 0.97Nm 2.3Nm 0.79Nm 1.21Nm 0.45Nm
H: 1/5 L: 1/20 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1200 300 0.88 0.29 0.50 0.18 0.36 0.12 0.19 0.07
1000 800 200 0.59 0.19 0.30 0.12 0.24 0.08 0.13 0.05
750 600 150 0.44 0.14 0.22 0.10 0.18 0.06 0.09 0.04
500 400 100 0.29 0.10 0.15 0.10 0.12 0.04 0.06 0.02
JTC25
Tr30x6
Speed
(rpm)
Lift Speed
(mm/min)
F = 25kN F = 20kN F = 10kN F = 5kN
H L H L H L H L
13.88N
m
4.45Nm 11.13N
m
3.58Nm 5.64Nm 1.85Nm 2.9Nm 0.99Nm
H: 1/6 L: 1/24 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 2.81 0.70 1.75 0.56 0.89 0.29 0.45 0.15
1000 1000 250 1.45 0.47 1.17 0.38 0.59 0.19 0.30 0.10
750 750 187.5 1.09 0.35 0.87 0.28 0.44 0.15 0.23 0.08
500 500 125 0.73 0.23 0.58 0.19 0.30 0.10 0.15 0.05
JTC50
Tr40x7
Speed
(rpm)
Lift Speed
(mm/min)
F = 50kN F = 40kN F = 20kN F = 10kN
H L H L H L H L
30.97N
m
9.73Nm 24.85N
m
7.83Nm 12.6Nm 4.04Nm 6.47Nm 2.15Nm
H: 1/7 L: 1/28 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 4.86 1.53 3.90 1.23 1.98 0.63 1.02 0.34
1000 1000 250 3.24 1.02 2.60 0.82 1.32 0.42 0.68 0.22
750 750 187.5 2.43 0.76 1.95 0.62 0.99 0.32 0.51 0.17
500 500 125 1.62 0.51 1.30 0.41 0.66 0.21 0.34 0.11

6. JTC100
Tr55x9
Speed
(rpm)
Lift Speed
(mm/min)
F = 100kN F = 60kN F = 40kN F = 20kN
H L H L H L H L
67.19
Nm
21.46
Nm
40.65
Nm
13.08
Nm
27.38
Nm
8.89
Nm
14.11
Nm
4.7
Nm
H: 1/9 L: 1/36 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 10.55 3.37 6.38 2.05 4.30 1.40 2.22 0.74
1000 1000 250 7.04 2.25 4.26 1.37 2.87 0.93 1.48 0.49
750 750 187.5 5.28 1.69 3.19 1.03 2.15 0.70 1.11 0.37
500 500 125 3.52 1.12 2.13 0.68 1.43 0.47 0.74 0.25
JTC150
Tr60x9
Speed
(rpm)
Lift Speed
(mm/min)
F = 150kN F = 120kN F = 100kN F = 50kN
H L H L H L H L
104.7
Nm
33.7
Nm
83.9
Nm
27.11
Nm
70.11
Nm
22.69
Nm
35.5
Nm
11.63
Nm
H: 1/9 L: 1/36 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 16.44 5.30 13.18 4.26 11.01 3.56 5.57 1.83
1000 1000 250 10.96 3.53 8.79 2.84 7.34 2.37 3.72 1.22
750 750 187.5 8.22 2.65 6.59 2.13 5.50 1.78 2.79 0.91
500 500 125 5.48 1.77 4.39 1.42 3.67 1.19 1.86 0.61
JTC200
Tr70x10
Speed
(rpm)
Lift Speed
(mm/min)
F = 200kN F = 150kN F = 100kN F = 50kN
H L H L H L H L
146
Nm
47.75
Nm
109.9
Nm
36.05
Nm
73.66
Nm
24.34
Nm
37.47
Nm
12.63
Nm
H: 1/10 L: 1/40 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 22.94 7.50 17.25 5.66 11.56 3.82 5.88 1.98
1000 1000 250 15.29 5.00 11.50 3.77 7.71 2.55 3.92 1.32
750 750 187.5 11.47 3.75 8.62 2.83 5.78 1.91 2.94 0.99
500 500 125 7.65 2.50 5.75 1.89 3.85 1.27 1.96 0.66
JTC250
Tr80x10
Speed
(rpm)
Lift Speed
(mm/min)
F = 250kN F = 200kN F = 150kN F = 100kN
H L H L H L H L
200.4
Nm
67.32
Nm
160.6
Nm
54.05
Nm
120.8
Nm
40.78
Nm
80.94
Nm
27.51
Nm
H: 1/10 L: 1/40 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 31.46 10.57 25.21 8.49 18.96 6.40 12.71 4.32
1000 1000 250 20.97 7.05 16.80 5.66 12.64 4.27 8.47 2.88
750 750 187.5 15.73 5.28 12.60 4.24 9.48 3.20 6.35 2.16
500 500 125 10.49 3.52 8.40 2.83 6.32 2.13 4.24 1.44
JTC350
Tr100x 10
Speed
(rpm)
Lift Speed
(mm/min)
F = 350kN F = 300kN F = 150kN F = 100kN
H L H L H L H L
325.5
Nm
107.5
Nm
279.3
Nm
92.27
Nm
140.5
Nm
46.71
Nm
94.18
Nm
31.52
Nm
H: 1/10 L: 1/40 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 51.47 16.83 44.12 14.49 22.06 7.34 14.79 4.95
1000 1000 250 34.31 11.25 29.41 9.66 14.71 4.89 9.86 3.30
750 750 187.5 25.74 8.44 22.06 7.25 11.03 3.67 7.40 2.48
500 500 125 17.16 5.63 14.62 4.83 7.35 2.45 4.93 1.65
JTC500
Tr100x 10
Speed
(rpm)
Lift Speed
(mm/min)
F = 500kN F = 400kN F = 300kN F = 200kN
H L H L H L H L
441.6
Nm
147.7
Nm
353.7
Nm
118.4
Nm
265.8
Nm
89.17
Nm
177.8
Nm
59.91
Nm
H: 1/14 L: 1/56 (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
1500 1500 375 69.44 24.04 55.56 18.60 41.67 14.01 27.78 9.41
1000 1000 250 46.30 12.25 37.04 12.40 27.78 9.34 18.62 6.27
750 750 187.5 34.72 9.17 27.78 9.30 20.87 7.00 13.92 4.71
500 500 125 23.15 6.13 18.52 6.20 13.91 4.67 9.31 3.14

7. Specifications
Model
JTC
2.5
JTC
5
JTC
10
JTC
25
JTC
50
JTC
100
JTC
150
JTC
200
JTC
250
JTC
350
JTC
500
Max. lifting force (kN) 2,5 5 10 25 50 100 150 200 250 350 500
Max. pulling force
(kN)
2,5 5 10 25 50 100 150 200 250 350 500
Lift screw sizes (mm) 14x4 18x4 20x4 30x6 40x7 55x9 60x9 70x10 80x10 100x10 120x14
Gear ratio (H) 5:1 5:1 5:1 6:1 7:1 9:1 9:1 10:1 10:1 10:1 14:1
Lift screw travel
(mm), per turn of
input shaft (H)
0.8 0.8 0.8 1 1 1 1 1 1 1 1
Efficiency % (H) 34 30 28 27 25 19 19 19 19 15 15
Gear ratio (L) 20:1 20:1 20:1 24:1 28:1 36:1 36:1 40:1 40:1 40:1 56:1
Lift screw travel
(mm), per turn of
input shaft (L)
0.2 0.2 0.2 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
Efficiency % (L) 24 23 21 19 18 14 14 14 14 11 11
Idling torque (N.m) 0.06 0.1 0.26 0.36 0.76 1.66 1.9 2.54 2.64 3.24 3.96
Max. permissible
power (kw)
0.18 0.3 0.5 1.1 2.2 4.5 6 8 9 11 20
Max. permissible
torque (N.m) input
shaft
1.5 3.4 7.1 18 38 78 93 196 240 340 570
Lubricant (kg) 0.02 0.04 0.1 0.2 0.48 0.9 1.5 1.9 1.9 2.7 3.1
Weight without stroke
(kg)
1 3 5 6 18 32 32 57 57 85 160
Weight of screw (kg),
per 100 mm stroke
0.15 0.35 0.45 0.7 1.2 2 2.5 3.5 4.2 6.6 10.3
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.