JTW-20T Machine Screw Jack

JTW-20T Machine Screw Jack Pictures


JTW-20T Machine Screw Jack Features
1. Maximum load capacity 20 ton, maximum torque 228 Nm.
2. Lift screw diameter 65 mm, pitch 12 mm. Gearbox sizes 295x218x187mm. Center height 87mm, center distance 72mm. Worm shaft diameter 28mm.
3. 8:1, 24:1 gear ratios
4. Translating screw, rotating screw with aluminum bronze traveling nut, non-rotation keyed screw configurations in upright or inverted mounting orientation.
5. Precisely positioning, self-locking acme screw which supports the loads and hold position with no need to employ brake mechanism or other locking systems.
6. Manual machine screw jack by hand wheel or hand crank, electrical drive machine screw jack by electric motor or gearmotor driven, or both.
7. 3-phase or single phase motor driven with 1500 rpm input, standard lifting speed 2250 mm/min and 750 mm/min.
8. Top plate (I), clevis end (II), plain end(III) and threaded end (IV) are available. Custom made spherical hinge, forked head.
9. Individually or multiple jtw-20t machine screw jack lift system arrangements are available.

JTW-20T Machine Screw Jack Specifications


JTW-20T Machine Screw Jack Dimensional Drawing


JTW-20T Machine Screw Jack Ordering Information

JTW   -   20T   -   UR  -   300   -   H  -   II   -   C   -   HW
   1             2           3           4          5      6        7         8

1. Jack Brand
JT: "Jacton" brand screw jack
W: W series machine screw jack

2. Load Capacity
20T: 20 ton load
Before selecting 20T, please check above JTW-20T Machine Screw Jack specifications.

3. Screw Configuration & Mounting Orientation
US: Upright translating screw                UK: Upright keyed screw                 UR: Upright rotating screw
IS: Inverted translating screw                 IK: Inverted keyed screw                 IR: Inverted rotating screw


4. Travel Stroke
300, means travel stroke 300mm
We machined lifting screw stroke following buyers requirements


5. Gear Ratio
JTW-20T jack gear ratios include 8:1, 24:1.
H: High gear ratio 8:1, 1.5mm travel length per full turn of worm shaft.                                     
L: Low gear ratio 24:1, 0.5mm travel length per full turn of worm shaft. 
Custom made medium speed ratio 1/12, 1.0mm travel length per full turn of worm shaft. 

6. Lift Screw End Fittings
Standard lift screw end fittings includes top plate (I), clevis end (II), plain end(III) and threaded end (IV). Custom made spherical hinge, forked head etc. If special lifting screw end fitting needed, please send us the end fitting drawings, we will make them following the drawings.


7. Worm Shaft Input Types
A: left side worm shaft input.              
B: right side worm shaft input.             
C: double worm shaft input.
M1: right side motor flange direct input, left side worm shaft input.                                       
M2: right side motor flange direct input. 
M3: left side motor flange direct input, right side worm shaft input.                  
M4: left side motor flange direct input.


8. Accessories
N: No accessory
PP: Protective tube (lifting screw dust-proof and rustproof)
BB: Bellows boots (lifting screw dust-proof and rustproof)
HW: Hand wheel (hand operated)
DC: Digital counter or digital position indicator (installed on worm shaft, precision display stroke)
EM: Electric motor (motor driven)
GR: Gear reducer (motor driven with reduction gearbox)
WR: Worm gear reducer (motor driven with worm reduction gearbox)
LS: Limit switches (control stroke, when full extend or full retract travel, the motor will stop )
SN: Stop nut (installed at the bottom of lifting screw, prevent lifting screw from being removed from the jack housing)
PB: Pillow block bearing (when long distance between the supports, pillow block bearing is recommended)
FB: Flange pillow block bearing (when rotating screw jacks with long stroke or unguided, flange pillow block bearing is recommended)
FC: Flexible coupling (interconnections with drive shafts)
CS: Connecting shaft (for connecting drive shafts like screw jack lift system)
BG: Miter gearbox (right angle transmit rotary motions, power or torque in screw jack lift system)
SP: Swivel plate (installed on jack base with swivel pins for pivoting of loads)
RE: Rod end (solar tracking systems is required)


JTW-20T Machine Screw Jack Applications

JTW-20T Machine Screw Jack applications in coil sheet slitter line, paint coating line, corrugated machine, rewinding line, pickling line, cut to length line, electrolytic tinning line process, tension levelling line, continuous galvanizing line, beverage production line, continuous hot dip galvanizing line, continuous laminator line, adjusting synchronous coil feed lines rolls, steel mills line roller adjustment, bridge beams lifting system, continuous rotary blancher, continuous paper filter, foam concrete cutting machine, sanding machine, heavy vehicles mobile lifting platform, lower and upper linear freeze-dryer system, steel profiles alignment, bottle monitoring system height adjustment, conveyor adjustment, plate saw angle adjustment, wide belt grinding machine precise adjustment, open and close a sealed pressure tank, turning over foil coils and metallurgy industry, mining industry, chemical industry, construction industry, irrigation industry.