Instruction Manual

3
Imperial Series – Machine Screw Jacks
2 General Information
2.1 General
This manual contains maintenance instructions for Power jacks 1800, 9000, 4800 and 9800 imperial
machine screw jacks. It describes and details procedures for disassembly, cleaning, inspection, rebuilding
and assembly of these screw jacks.
2.2 Industrial use only
The ball screw jacks described and illustrated in this manual are intended for industrial use only and should
not be used to lift, support, or otherwise transport people unless you have a written statement from Power
Jacks, which authorises the specific screw jack, as used in your application, as suitable for moving people.
2.3 Table of specifications
Model
Number
Upright
1802 &
9002
1805 1810 1815 1820 1825 9035 1850 1899 18150
Inverted
1801 &
9001
1804 1809 1814 1819 1824 9034 1849 1898 8149
Rated Load (Tons)
2 5 10 15 20 25 35 50 100 150
Diameter of Lifting Screw
(ins)
1
.20 Pitch
Acme
1½
.375 Pitch
Square
2
.500 Pitch
Square
2¼
.500 Pitch
Square
2½
.500 Pitch
Square
3⅜
.666 Pitch
Square
3¾
.666 Pitch
Square
4½
.666 Pitch
Square
6
.750 Pitch
Square
7
.1 Pitch
Square
Closed Height ** (in)
5¼ 7 7¼ 8 9¼ 11 12 13 24 24
Base Size (in)
3½ x 7
4½ x 6¼
6 x 8 7½ x 8
¾
7¾ x 9
¼
8¼ x 11 10¼x13 ¾ 10¼ x 15 ½ 9¾ x 19¾ 20¾ x 27½ 20¾ x 24½
Worm Gear
Ratios
Std. Ratio
6:1 6:1 8:1 8:1 8:1 10 2/3:1 10 2/3:1 10 2/3:1 12:1 12:1
Optional
24:1 24 24:1 24:1 24:1 10 2/3:1 10 2/3:1 10 2/3:1 36:1 36:1
Turns of worm
for 1” raise
Std. Ratio
24 16 16 16 16 16
16
16 16 12
Optional
96 64 48 48 48 48
48
48 48 36
Maximum HP
per actuator
Std. Ratio
2 4 5 5 5 8 8 15 25 25
Optional
½ 1½ 1½ 1½ 2½ 2½ 6 11 11
Torque at Full
Load* (in.lb)
Std. Ratio
120 450 950 1,430 2,050 3,360 4,600 7,500 16,000 28,100
Optional
50 185 490 820 1,170 1,900 2,750 4,200 8,600 15,500
Jack efficiency
Rating (%)
Std. Ratio
23.2 22.1 22.0 20.2 18.2 16.4 15.2 13.8 13.0 14.1
Optional
13.3 12.1 14.0 12.9 20.2 9.2 8.5 8.3 8.0 8.6
Weight with Base
Raise of 6” (lbs)
17 35 52 66 93 181 240 410 1,200 1,350
Weight for each
additional 1” Raise (lbs)
.33 .85 1.4 1.5 2.6 3.5 4.1 5.5 9.0 12.6
* For loads of from 25% to 100% of jack load rating. Torque requirements are approximately proportional to the load.
** Closed heights are for standard upright models and may vary with different screw ends, inverted models, or when bellows
boot is used
TABLE 2. 4800 AND 9400 SERIES
Actuator No 4802 & 9402 4805 4810 4815 4820 4825 9435 4850 4899 48150
Rated load (tons) 2 5 10 15 20 25 35 50 100 150
Torque at full load
(in-lbs)
Std Ratio 135 500 1005 1658 2261 3712 5060 8022 17004 31330
Optional 56 228 526 904 1228 1947 3025 4542 9210 17225
Jack efficiency rating % 19.6
11.9
19.9
10.9
19.8
12.6
18.0
11.7
16.9
10.8
14.8
8.3
13.7
7.7
12.4
7.3
11.7
7.2
12.7
7.7
Closed Height (in) 5¼ 7 7¼ 8 9¼ 12 13 14 26½ 26¼
Weight with Base raise of 6” (lb) 18 37 55 70 101 197 250 440 1325 1475
NOTE: Additional specifications are same as for Series 1800 and 9000. See Table 1.
Model Number
Upright 1802 & 9002 9005 9010 9015 9020 9025
Inverted 1801 & 9001 9004 9009 9014 9019 9024
Rated Load (tons) 2 5 10 15 20 25
Lifting Screw 1” dia
.250 Pitch
Acme
1½” dia
.250 Pitch
Acme
2” dia
.250 Pitch
Acme
2¼” dia
.250 Pitch
Acme
2½” dia
.250 Pitch
Acme
3⅜” dia
.250 Pitch
Acme
Worm Gear Ratio 25:1 25:1 25:1 25:1 25:1 25:1
Turns of Worm for 1” Raise 100 100 100 100 100 100
Torque at Full Load (in-lbs) 48 175 270 640 925 1500
Actuator efficiency Rating % 13.2 9.1 8.6 7.5 6.9 5.3
Maximum H.P per Screw Jack ½ ¾ 1½ 1½ 1½ 2½
Note: All other data for these models same as shown in Table 1