Joyce RWB3250 - Manual (Page 12)

12
3-5 Specifications
Model
Number
WBL51
WBL201
WB51
WB201
(R)WB62
(R)WB122
(R)WB242
(R)HWB62
(R)HWB122
(R)HWB242
WB65
WB125
WB245
HWB65
HWB125
HWB245
WBL810
WBL2410
HWBL810
HWBL2410
Capacity 1 TON 1 TON 2 TON 2 TON 5 TON 5 TON 10 TON 10 TON
Lifting Screw
Diameter
(inches)
3/4 3/4 1 1 1-1/2 1-1/2 1-1/2 1-1/2
Thread
Pitch/ Lead
(inches)
.2 .2 .25 1.00 .474 1.00 .474 1.00
Worm Gear
Ratio
5:1
20:1
5:1
20:1
6:1
12:1
24:1
6:1
12:1
24:1
6:1
12:1
24:1
6:1
12:1
24:2
8:1
24:1
8:1
24:1
Worm Shaft
Turns for 1"
Travel
25
100
25
100
24
48
96 6
12
24
12.66
25.33
50.66 6
12
24
16.88
50.66 8
24
Tare Torque
(inch/Lbs.)
3 3 4 4 10 10 20 20
Starting
Torque
(inch/Lbs.)
. 014W*
.005W*
.014W*
.005W* .015W*
.009W*
.006W* .064W*
.039W*
.028W* .030W*
.019W*
.013W* .065W*
.041W*
.029W* .022W*
.010W* .047W*
.024W*
Operating
Torque †
(inch lbs.) @
Worm RPM
.012W*
.004W*
@ 500 RPM
.012W*
.004W*
@ 500 RPM
.013W*
.007W*
.004W*
@ 500 RPM
.051W*
.028W*
.017W*
@ 500 RPM
.025W*
.014W*
.008W*
@ 300 RPM
.052W*
.029W*
.018W*
@ 300 RPM
.019W*
.008W*
@ 200 RPM
.039W*
.016W*
@ 200 RPM
Screw
Torque **
(inch lbs.)
.035 W* .035 W* .044W .177 W* .084 W* .177W .084 W* .177 W*
Efficiency
Rating
% approx.
51.7
38.5 51.7
38.5
52.1
47.2
39.3 52.1
47.2
39.3 51.1
45.7
37.2 51.1
45.7
37.2
50.7
40.3 50.7
40.3
Ball Screw
Life at Rated
Load (Inches
travel X
1000)
108 858 642 190 1,015 512 127 64
Worm
Holding
Torque ††
.006W*
.002W*
.006W*
.002W*
.007W*
.004W*
.002W*
.033W*
.020W*
.014W*
.013W*
.007W*
.004W*
.033W*
.020W*
.014W*
.010W*
.004W*
.024W*
.012W*
Basic Jack
Weight (lbs.)
8 8 18 18 42 42 58 58
Add to Basic
Jack Weight
(lbs.) for
each
Additional 1"
of Travel
.25 .25 .4 .4 .7 .7 .9 .9
**Screw torque is the required torque to keep the screw from rotating
† Operating torque is the torque required for a given load (increases as speed decreases)
†† Torque required to prevent worm (input shaft) from backdriving.