Joyce Machine Screw Jacks - Manual (Page 12)

12
3-3 Specifications (continued)
Model
Number
WJ1125
WJ3225 DWJ1125
DWJ3225 WJ1130
WJ3230 DWJ1130
DWJ3230 WJ1135
WJ3235 (R)WJT1150
(R)WJT3250 WJ1175
WJ3275 WJ12100
WJ36100 WJ12150
WJ36150
WJ50250
Capacity 25 TON 25 TON 30 TON 30 TON 35 TON 50 TON 75 TON 100 TON 150 TON 250 TON
Lifting Screw
Diameter
(inches)
3 3/8 3 3/8 3 1/2 3 1/2 3 3/4 4 1/2 5 6 7 9
Thread
Pitch/Lead
(inches)
.666
Pitch
Stub
Acme
.5625 Pitch
1.125 Lead
Acme
.666 Pitch
Acme
.5625 Pitch
1.125 Lead
Acme
.666 Pitch
Acme
.666 Pitch
Acme
.666 Pitch
Mod.
Square.
.750 Pitch
Mod.
Square.
1.00 Pitch
Mod.
Square.
1.00 Pitch
ACME
Worm Gear
Ratio
11:1
32:1 11:1
32:1 11:1
32:1 11:1
32:1 11:1
32:1 11:1
32:1 11:1
32:1 12:1
36:1 12:1
36:1
50:1
Worm Shaft
Turns for 1"
Travel
16
48 9.5
28.5
16
48 9.5
28.5
16
48 16
48 16
48 16
48 12
36
50
Tare Torque
Inch lbs.
50 .50 60 60 .70 100 155 205 300 500
Starting
Torque Inch
lbs.
.088W*
.053W* .106W*
.063W* .088W*
.052W* .107W*
.064W* .093W*
.055W* .095W*
.050W* .107W*
.056W* .112W*
.059W* .134W*
.070W*
Operating
Torque Inch
lbs.
.055W*
.025W*
@ 200
RPM
.067W*
.030W*
@ 200 RPM
.055W*
.025W*
@
200 RPM
.067W*
.030W*
@ 200 RPM
.057W*
.026W*
@ 200 RPM
.063W*
.027W*
@ 150 RPM
.067W*
028W*
@ 150 RPM
.072W*
.031W*
@90 RPM
.084W*
.037W*
@90 RPM
.036W*
@60 RPM
Screw Torque
** (inch lbs.)
.313W* .384W** .313W* .384W* .328W* .378W* .418W* .495W* .595W* .711W*
Efficiency
Rating
approx.
18.3%
13.5% 25.1%
18.6% 18.3%
13.5% 25.1%
18.6% 17.4%
12.9% 15.8%
12.4% 14.8%
11.7% 13.9%
10.8% 15.7%
12.1%
8.8%
Basic Jack
Weight (lbs.)
164 164 164 164 240 387 610 1010 1350 3415
Add to Basic
Jack Weight
(lbs.) for each
Additional 1"
of Travel
3.0 3.0 3.1 3.1 3.4 6.1 6.5 10.0 12.2 21.0
Series DWJ may lower under load. External locking systems are required
W* = Load in pounds
**Screw torque is the torque required to keep the screw from rotating.
† Operating torque: torque required for a given load increases as speed decreases