Duff-Norton Machine Screw Rotating 500lb - 1 Ton User Manual

Installation, Operating and
Maintenance Instructions

With Parts List
Publication Part No. SK-2389-R1

®

Rotating

Machine Screw

Actuators

1/4 Through 1-Ton Capacity

Caution

This manual contains important information for the correct installation, operation and mainte­nance of the equipment described herein. All persons involved in such installation, operation, and
maintenance should be thoroughly familiar with the contents. To safeguard against the possibility
of personal injury or property damage, follow the recommendations and instructions of this
manual and keep it for further reference.

Warning

The equipment shown in this manual is intended for industrial use only and should not be used
to lift, support, or otherwise transport people.

®

Contents

Section I General Information ................................................................................................. 3

1-1. General .................................................................................................................... 3

1-2. Applications.............................................................................................................. 3

1-3. Specifications........................................................................................................... 3

1-4. Dimensions .............................................................................................................. 4

Table 2. Upright Models......................................................................................................... 4

1-4. Dimensions (Cont.) .................................................................................................. 5

Table 3. Inverted Models ....................................................................................................... 5

1-5. Important Precautions.............................................................................................. 5

1-6. Warranty and Warranty Repair ................................................................................6

Section II Maintenance ............................................................................................................ 6

2-1 Lubrication ............................................................................................................... 6

2-2. Rebuild Procedure ................................................................................................... 6

2-3. Required Tools ......................................................................................................... 6

2-4. Disassembly............................................................................................................. 6

2-5. Cleaning................................................................................................................... 7

2-6. Inspection................................................................................................................. 7

2-7. Assembly ................................................................................................................. 7

Figure 2-1. Expansion Plug Replacement.................................................................................. 8

Section III lllustrated Parts List.................................................................................................. 9

3-1. General .................................................................................................................... 9

3-2. Parts List................................................................................................................ 10

Figure 3-1. Exploded Illustration

Rotating Machine Screw Actuators.........................................................................11

Section I

General Information

1-1. General

1-2. Applications

This manual contains maintenance instructions for Duff
Norton 1/4 through 1- ton rotating machine screw actua­tors. It describes and details procedures for installation,
disassembly, cleaning, inspection, and assembly of these
actuators.

The actuators 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 Duff-Norton which autho­rizes the specific actuator unit, as used in your applica­tion, as suitable for moving people.

1.3. Specifications
Table 1. 1/4-ton through 1-ton Series Rotating Machine Screw Actuators

Actuator No. Upright UM2556 UM2626 UM2502
Standard Inverted DM2556 DM2626 DM2502
Actuator No. Upright UM3056 UM3626 UM3502
Special Inverted DM3056 DM3626 DM3502

Rated Load (lb) 500 1000 2000
Diameter of 1/2 5/8

Lifting Screw .250 Pitch .125 Pitch .200 Pitch
(inches) ACME ACME ACME
Base Size (in.) 2 1/4 x 4 2 1/4 x 4 2 3/4 x 5
Worm Gear Std. Ratio 5:1 5:1 5:1
Ratios Optional - - 20:1
Turns of Worm Std. Ratio 20 40 25
for 1" Raise Optional - - 100
Maximum H.P. Std. Ratio 1/3 1/3 1/2
Per Actuator Optional - - 1/4
Torque at Full Std. Ratio 13 21 55
Load* (in-lbs) Optional - - 2 5
Jack Efficiency Std. Ratio 33.0 20.0 24.5
Rating (%) Optional - - 14.0
Weight with Base
Raise of 6" (lb) 2.3 2.3 5.0

Weight for Each
Additional 1" Raise (lb) 0.1 0.1 0.3

3/4

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

3

1-4. Dimensions

(in)

Note: Housing Dimensions and Base Configurations vary.

Table 2. Upright Models

Model A B C F G H I J K

Number Rating (in)

U M - 25 5 6 1/4 Ton Raise + 1 1/2 5 / 8 2 3 /8 0.312 7 /8 3/8 2 1/4 4 Holes- 9/32 Dia. on 1 3/4 Dia. B.C. 1
UM-262 6 1/2 Ton Raise + 1 7/8 5 / 8 2 3/8 0.437 7/8 3 /8 2 1/4 4 Holes- 9/32 Dia. on 1 3/4 Dia. B.C. 1
UM-2502 1 Ton Raise + 1 3/4 5 / 8 3 1/4 0.500 1 1/2 1 / 2 3 1/4 4 Holes-13/32 Dia. on 2 3/8 Dia. B.C. 1 1/2

Note: Dimensions are subject to change without notice.

4

(in) (in) (in)(in)(in) (in) (in)