M-SERIES IMPERIAL BALL SCREW JACKS
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Basic Information
Model |
Capacity (Short Tons) |
Lifting Screw |
Weight with base raise of 6” (lbs) |
Weight for each additional 1” raise (lbs) |
Drawing (DWG, DXF or PDF) |
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Diameter |
Lead 1 |
Lead 2 |
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M28631 |
0.5 |
5/8 |
0.2 |
- |
2.75 |
0.1 |
|
M2802 |
2 |
1 |
0.25 |
1 |
20 |
0.33 |
On request |
M28003 |
3 |
1 11/64 |
0.413 |
- |
21 |
0.42 |
On request |
M2805 |
5 |
1.5 |
0.474 |
1 |
40 |
0.85 |
On request |
M2810 |
10 |
1.5 |
0.474 |
1 |
50 |
0.85 |
On request |
M2820 |
20 |
2.25 |
0.5 |
- |
115 |
1.5 |
On request |
M2825 |
25 |
3 |
0.66 |
- |
235 |
2.9 |
On request |
M28260 |
50 |
4 |
1 |
- |
520 |
5 |
On request |
Performance Information
Gear Ratio - Option 1
Model |
Worm Gear Ratio |
Turns of worm for 1” travel |
Max Input Power (hp) |
Start-up Torque at full load (in .lb) |
Running Torque at full load (in .lb) |
Efficiency |
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Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
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M28631 |
5:1 |
25 |
- |
1/3 |
10.5 |
- |
9.5 |
- |
0.67 |
- |
M2802 |
6:1 |
24 |
6 |
2 |
50 |
180 |
45 |
160 |
0.59 |
0.66 |
M28003 |
6:1 |
14.526 |
- |
2 |
110 |
- |
100 |
- |
0.66 |
- |
M2805 |
6:1 |
12.667 |
6 |
4 |
220 |
500 |
180 |
410 |
0.70 |
0.65 |
M2810 |
8:1 |
16.888 |
8 |
5 |
350 |
800 |
300 |
700 |
0.63 |
0.57 |
M2820 |
8:1 |
16 |
- |
5 |
700 |
- |
650 |
- |
0.61 |
- |
M2825 |
10 2/ 3:1 |
16.16 |
- |
8 |
925 |
- |
825 |
- |
0.60 |
- |
M28260 |
10 2/ 3:1 |
10.66 |
- |
15 |
2700 |
- |
2200 |
- |
0.68 |
- |
(for keyed and anti-backlash models consult Screw Jack) |
Gear Ratio - Option 2
Model |
Worm Gear Ratio |
Turns of worm for 1” travel |
Max Input Power (hp) |
Start-up Torque at full load (in .lb) |
Running Torque at full load (in .lb) |
Efficiency |
||||
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
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M28631 |
20:1 |
100 |
- |
1/6 |
5 |
- |
4.5 |
- |
0.35 |
- |
M2802 |
24:1 |
96 |
24 |
½ |
25 |
80 |
20 |
70 |
0.33 |
0.38 |
M28003 |
24:1 |
58.104 |
- |
½ |
50 |
- |
45 |
- |
0.37 |
- |
M2805 |
24:1 |
50.667 |
24 |
¾ |
90 |
206 |
80 |
183 |
0.39 |
0.36 |
M2810 |
24:1 |
50.667 |
24 |
1 ½ |
175 |
400 |
150 |
290 |
0.42 |
0.46 |
M2820 |
24:1 |
48 |
- |
1 ½ |
325 |
- |
300 |
- |
0.44 |
- |
M2825 |
32:1 |
48.48 |
- |
2 ½ |
475 |
- |
425 |
- |
0.39 |
- |
M28260 |
32:1 |
32 |
- |
6 |
1500 |
- |
1200 |
- |
0.41 |
- |
(for keyed and anti-backlash models consult Screw Jack) |
Gear Ratio - Option 3
Model |
Worm Gear Ratio |
Turns of worm for 1” travel |
Max Input Power (hp) |
Start-up Torque at full load (in .lb) |
Running Torque at full load (in .lb) |
Efficiency |
||||
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
Lead 1 |
Lead 2 |
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M2802 |
12:1 |
48 |
12 |
¾ |
30 |
135 |
25 |
105 |
0.53 |
0.51 |
M28003 |
12:1 |
29.052 |
- |
¾ |
68 |
- |
60 |
- |
0.55 |
- |
Model Numbers
Prefix |
Model Type |
Series |
Model |
Stroke (mm) |
Suffix |
For Future Use |
Translating Screw Jacks Rotating Screw Jacks
|
M |
Translating Screw Jacks Inverted = Decrease model number 1, e.g. 2804 Rotating Screw Jacks Increase model number 1, e.g. 2806 Lead 1 = standard Lead 2 = add 1 to end of model number, e.g. 28051 |
XXX |
1 = Option 2 Gear Ratio B = Bellows Boot G = Second Guide L = Left Hand Worm Shaft Only R = Right Hand Worm Shaft Only X = No Bottom Pipe, Guide Bush Instead |
