OPERATING MANUAL
METO-FER® AUTOMATION AG
ROTARY ACTUATOR TYPE MD 20/180B
SERIES FROM 6-06
1. PRODUCT DESCRIPTION
1.1 Introduction
1.1.1. Utilization
The rotary actuator MD 20/180B is able to execute rotary movements in any
position. The rotary movement can be adjusted in its working area.
1.1.2. Safety Precautions
Before starting to operate the rotary actuator MD 20/180 B, it is necessary to
check that no body parts are within the working range of the element. In such a
case the unit must not be operated.
The maximum supply pressure of 8 bar must not be surpassed.
1.1.3. Danger Area
Any body parts are to be kept out of the working area (rotary area) of the unit in
order to avoid mangling.
1.2 Technical Data
1.2.1 Weights and Measurements
See also Sheet 6
Type Angle of Rotation Air consumption*
MD 20/180 B 0-180
o
*for each double stroke at 72.5 PSI (5 bar)
1.2.2. Performance Characteristics
Max load radial to shaft 40.0 Lb. (180N)
Max load axial to shaft 67.0 Lb. (300N)
Repeatability +/- 200 ARC SEC
Weight
Lb.(kg)
.004 scf/0.012 NL 2.64(1.2)
NL: Normal Liter
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Torque at 72.5 PSI (5 bar) 9.74. Lb. In. (1.1NM)
OPERATING MANUAL (MD 20/180 B)
1.2.3 Operating Source
40mm filtered, unoiled or oiled air (dew point 6oC)
Operating pressure P
1.2.4 Connections
Air connections M-5 (See sheet 6)
1.2.5 Environment
P
min
max
3 bar
8 bar
Temperature 50
o
F to 122oF (+ 10oC to + 50oC)
Relative humidity 95% (without condensation of water)
Purity of the environment air regular working place atmosphere
1.3 Features
1.3.1 Standard Features (included in delivery)
The unit delivered will have two patented end screws type AS 10/50 with fine
thread. These end screws adjust the angle of rotation within its working area.
Option: 2 pieces oil cushions OB 15/10L (2 pieces MU 01.008 nut + O-ring) and
compensation reservoir KOB 50. The cushions are used to cushion the end
position of the rotary actuator.
1.3.2 Special Equipment
The end screws can be fitted with the patented sensing elements (see Meto-Fer
Electronic catalog, pages 22 and 23) in order to check the end position.
®
2. SAFETY REGULATIONS
2.1 In general
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See chapters 1.1.1
1.1.2
1.1.3
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OPERATING MANUAL (MD 20/180 B)
2.2 Specifically
Do not make any changes or modifications to the unit (voids warranty).
3. CONSTRUCTION AND FUNCTION
The angle of rotation can be made infinitely variable with the end screws AS
10/50. Please note by needed rotation from 0o to 60o, put stop screw in Pos.B-B.
Rotation from 60o to 90o, put stop screws in Pos. A-A (see Sheet 6).
4. INITIAL OPERATION
4.1 Compressed Air
Remove the safety caps from the air connections. In order to regulate the velocity
of the movement, we recommend our flow controls DV-M5 (see sheet 5.021).
Unused air connections must be covered with the M-5 caps.
4.2 Adjustment of Angle
- loosen security nut on the stop screw
- adjust the required angle with the stop screw (Pos.101)
- tighten security nut on the end screw
4.3 Cushion Adjustment
The basic adjustment of the cushions has to be optimized by the user upon his
special requirements.
The position of the cushions can be seen on the construction drawing.
The brake resistance can be changed by adjusting the length of the brake path.
When using oil and elastomer cushions, it must e checked that the end stop is not
made by the cushions. The cushions should show a remainder stroke of 0.0394”
(1mm).
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OPERATING MANUAL (MD 20/180 B)
5. MAINTENANCE
5.1 Introduction
The rotary unit does not require any special maintenance procedure. Never use
any type of solvents in order to clean the unit.
5.2 Air Supply
The rotary actuator is equipped with oil-free seals and can be operated with dry
and non-oiled compressed air. If oiled compressed air is used, we recommend:
- Airpress compound SAE 5 (Klueber Order No. 063027)
6. REPAIR
6.1 Introduction
If the unit does no longer fulfill the desired requirements (leakage, wear, etc.) the
defective parts must be replaced.
6.2 Safety Precautions
Before dismounting the unit, it is necessary to check that the compressed air
supply is turned off. It is best to disconnect the compressed air supply from the
unit.
When repair work is done, only the original spare parts and lubrication must be
used.
6.3 Replacing the Seals
- Remove the slotted Ring Nut (Pos.204).
- Remove the Stop Plate (Pos.8) by loosening the Screws (Pos.206).
- Remove the Shaft (Pos.2).
- Remove the Top (Type B, Pos.6; Type B1, Pos.7).
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- Remove the Rack Pinion Piston (Pos.3).
OPERATING MANUAL (MD 20/180 B)
- Replace the Seals.
- Grease the Cylinder Bore, Rack Pinion, Shaft (see Chapter 7.2).
- With help of a distance block, make sure that the piston is in the middle of
the Cylinder.
- The parts are then reassembled in reverse order as described above.
6.4 Replacing the Ball Bearings
- Remove the slotted Ring Nut, Stop Plate and Shaft as described in Chapter
6.3.
- Remove the Ball Bearing (Pos.202).
- Extract the Ball Bearing (Pos.201).
- Grease and reassemble in reverse order as described above.
7. SPARE PARTS LIST
7.1 Spare Parts
When ordering spare parts, the type and serial number of the unit must be stated.
Position Part Number Description Quantity
5 MD 07.005 Cover Ring 1 Piece.
201 045.125.0135 Ball Bearing 1 Piece
202 025.125.0010 Ball Bearing 1 Piece
*213 025.100.0420 O-Rings 2 Pieces
*214 025.150.0110 Piston Seals 2 Pieces
Seal Kit Part No. 460.100.0113 all items marked with (*)
Repair Kit Part No. 460.110.0156 kit includes Pos.5, 201, 202
7.2 Lubrication
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Grease for seals Staburag NBU 4 Atemp.
(Klueber Order No. 005 040)
Grease for ball bearings Staburag NBU 4 Atemp.
(Klueber Order No. 005 040)
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