Quick Ref: MSAT-4049
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Machine Screwjack Actuator, 100t to 250t

Model:  MSAT-4049

Custom Dropdown
Part N° Rated Load (ton) Diameter of Lifting Screw (in) Closed Height** (in) Base Size (in) Weight with Base Raise of 6" (lb) Weight for Each Additional 1" Raise (lb) Guide Price Quantity
4049-T22623 100 6 .750 Pitch Square 24 20.75 x 24.5 1,200 9 Quote Required
4049-T22624 150 7, 1,000 Pitch Square 24 20.75 x 24.5 1,350 12.6 Quote Required
4049-T22625 250 9, 1000 Pitch Square 30 29.5 x 41 2,700 23 Quote Required
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Screwjack Actuator.

Machine Screw Rotating Jack

Machine Screwjack Actuators

These screw actuators offer a positive mechanical action, precise positioning and uniform lifting speeds.

The standard configurations include, upright or inverted units with translating or rotating lifting screws, with top plates, threaded or clevis end fittings.

They can be controlled accurately for positioning within thousands of one inch.

Unevenly distributed loads can be lifted with uniform speeds.

All actuators are designed and built to be positive acting, giving accurate response to motive power.

Top Plate Clevis End Threaded End
Top Plate
Clevis End
Threaded End

Translating Machine Screwjack Actuators - 100, 150 and 250 ton.

* For loads of from 25% to 100% of Actuator load rating. Torque requirements are approximately proportional to the load.

** Closed heights are for standard upright top plate models and may vary with different screw ends, inverted models, or when bellows boot is used.

Actuator Number Rated Load (ton) Diameter of Lifting Screw (in) Closed Height** (in) Base Size (in) Worm Gear Ratios Turns of Worm for 1" Raise Maximum HP Per Actuator Torque at Full Load (in-lbs) Actuator Efficiency Rating (%) Weight with Base Raise of 6" (lb) Weight for Each Additional 1" Raise (lb)
Upright Inverted Standard Ratio Optional Standard Ratio Optional Standard Ratio Optional Standard Ratio Optional Standard Ratio Optional
9099 9098 100 6 .750 Pitch Square 24 20.75 x 24.5 12:1 36:1 16 48 25 11 16,000 8,600 13.0 8 1,200 9
18150 18149 150

7, 1,000 Pitch Square

24 20.75 x 24.5 12:1 36:1 12 36 25 11 28,100 15,500 14.1 8.6 1,350 12.6
2250 2249 250 9, 1000 Pitch Square 30 29.5 x 41 50:1 - 50 - 35 - 20,000 - 8.0 - 2,700 23

Anti-Backlash Actuators

Actuator Number Rated Load (ton) Torque at Full Load (in-lbs) Actuator Efficiency Rating (%) Closed Height (in) Weight with Base Raise of 6" (lb)
Standard Ratio Optional Standard Ratio Optional
9499 100 17600 9460 11.7 7.2 26.5 1325
48150 150 30900 17050 12.7 7.7 26.25 1475
2250 250 22000 - 7.2 - 36.6 2975

Maximum Free Vertical Movement of Actuator Lifting Screw

Actuator Model Free Movement (in)
100-ton .18
150-ton .23
250-ton .23

Maximum Free Rotational Movement of Actuator Worm Shaft

Actuator Model/Ratio Free Movement (degrees)
100-ton

12:1

36:1

20

45

150-ton

12:1

36:1

20

45

250-ton 50:1 45

Minimum Gear Internal Thread Thickness at ID Land

 Actuator Model
Minimum Gear Thread Thickness (in)
 100-ton .18
 150-ton  .23
 250-ton  .23

Minimum Gear Tooth Thickness at OD Land at Centre

Actuator Model Minimum Gear Tooth Thickness (in)
100-ton .14
150-ton .14
250-ton .18
100 250 Ton Parts Image

Translating Machine Screw Actuator Parts List - 100t, 150t and 250t.

Index Number Part Name Quantity
1 Bushing 1
2 Base Plate 1
3 Shell, Actuator 1
4 Pipe, Bottom 1
5 Screw, Lifting 1
6a Worm Gear 1
6b Worm Gear and anti-backlash nut assembly (Mfg'd and sold in sets only) 1
7 Bearing, Bottom Load 1
8 Bearing, Top Load 1
9 Screw, Cap 12
10 Washer, Lock 12
11 Flange, Worm 2
12 Shim, Flange 2
13 Seal, Oil 2
14 Worm 1
15 Bearing, Worm 2
17 Grease Fitting 2
18 Lock Screw 1
19 Eye Bolt (250 ton only) 2
* Shell Cap (anti-backlash models) 1
* Set Screw (anti-backlash models) 2
* Guide Bushing (inverted models) 1
* Name Plate 1
100-250-ton-operations-manual.pdf

Operations Manual

(approx. 2.4Mb)
OneHundredTonMS.pdf

100 ton Specs

(approx. 0.5Mb)
OneHundredFiftyTonMS.pdf

150 ton Specs

(approx. 0.5Mb)
TwoHundredFiftyTonMS.pdf

250 ton Specs

(approx. 0.5Mb)

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