Rotary feedthroughs with highly variable ALMA flange and short solid shaft

For high transmittable torque
A wide variety of connection options
Compact design

These rotary feedthroughs guarantee maximum flexibility when connecting your attachments in a vacuum.

The short shaft end on the vacuum side is equipped with a flange connection with two centering options. To connect the follow-on components, two different thread sizes are available on one pitch circle.

On the atmospheric side of the rotary feedthrough housing there is a pitch circle with mounting threads for add-on components such as torque brackets, motor adapter flanges, etc.

Technical data

Leakage rate: < 1 x 10^-8 mbar x l/s
Operating temp., non-cooled: -20 bis 90 °C
Operating temperature, cooled: > 90 °C
Rotational speed: up to 4,000 rpm
Torque: up to 400 Nm
Pressure differential: up to 1 bar
Vacuum range: up to UHV
Shaft diameter: up to 79 mm
Flange diameter: up to 130 mm
Radial load: up to 400 N
Axial load: up to 300 N
Housing: Stainless steel
Shaft: Stainless steel, magnetic
Magnetic fluid: Maintenance-free

Available options

• Housing cooling
• Customer-specific versions

Model	ALMA-M-AF-044-A-U
Part number	1020634
Weight (kg)	1.500
Dimensions (mm)
Shaft diameter, vacuum side [Kg6]	44.0
Shaft diameter, atmospheric side [Pg6]	14.0
Shoulder diameter, atmospheric side [R]	15.0
Internal dia. of the shaft fit, vacuum side [LG6]	16.0
Centering depth shaft [M]	3.0
Total length [A]	100.0
Length, atmospheric side [F+G+H]	66.0
Length, vacuum side [D±0,05]	34.0
Total housing length [E+F+G]	75.0
Housing length, vacuum side [E]	30.0
Housing length, atmospheric side [F+G]	45.0
Housing fit diameter, vacuum side [Ng7]	54.0
Housing diameter, vacuum side [J0g-0,05]	53.95
Housing diameter, atmospheric side [Sg7]	58.0
Flange diameter [Ig7]	80.0
Flange length [F]	15.0
O-Ring diameter [D]	62,0
Pitch circle diameter [T]	50±0,10
Pitch circle diameter [U]	72±0,10
Pitch circle diameter [V]	36±0,10
Tapped hole (Ø x T) [A1]	M5 x 15 (6x)
Tapped hole (Ø x T) [A2]	M4 x 8 (6x)
Through-hole (Ø) [A3]	5.5 (6x)
Tapped through-hole (Ø x T) [A4]	M5 x 6 (6x)
Tapped through-hole (Ø x T) [A5]	M4 x 6 (6x)
Shaft specification
Max. rotational speed	4,000 min-1
Max. transmittable torque*	30.00 Nm
Friction torque	0.45 Nm
Max. axial load [Fa1]**	300 N
Max. axial load [Fa2]**	300 N
Max. radial load [Fr1]**	300 N
Max. radial load [Fr2]**	300 N

ALMA-M-AF-060-A-U
1019198
3.000
60.0
18.0
24.0
20.0
5.0
126.0
86.0
40.0
87.0
35.0
52.0
70.0
69.95
70.0
100.0
17.0
78,0
61±0,10
88±0,10
50±0,10
M6 x 17 (6x)
M5 x 10 (6x)
7 (6x)
M6 x 8 (6x)
M5 x 8 (6x)
2,000 min-1
70.00 Nm
0.5 Nm
300 N
300 N
300 N
300 N

ALMA-M-AF-064-A-U
1039773
5.000
64.0
22.0
24
20.0
5.0
166.0
122.0
44.0
110.0
35.0
75.0
75.0
74.95
80.0
115.0
25.0
90,0
65±0,10
103±0,10
55±0,10
M6 x 12 (6x)
M6 x 12 (6x)
7 (6x)
M5 x 11 (6x)
M4 x 11 (6x)
200-2,000 min-1
80.00 Nm
300 N
150 N
300 N
300 N

ALMA-M-AF-069-A-U
1039774
5.600
69.0
28.0
29.5
25.0
5.0
172.0
128.0
44.0
110.0
35.0
75.0
80.0
79.95
88.0
120.0
25.0
95,0
75±0,10
108±0,10
60±0,10
M6 x 12 (6x)
M6 x 12 (6x)
7 (6x)
M6 x 11 (6x)
M5 x 11 (6x)
200-2,000 min-1
150.00 Nm
300 N
150 N
350 N
350 N

ALMA-M-AF-079-A-U
1039775
7.300
79.0
28.0
39.5
30.0
5.0
180.0
136.0
44.0
110.0
35.0
75.0
90.0
89.95
98.0
130.0
25.0
105,0
85±0,10
118±0,10
70±0,10
M6 x 12 (6x)
M6 x 12 (6x)
7 (6x)
M6 x 11 (6x)
M5 x 11 (6x)
200-2,000 min-1
400.00 Nm
300 N
150 N
400 N
400 N

*   The torque calculation is based on mean calculated values.
** The load calculation is based on assumed values, which cover 95 % of applications.
    Individual calculations can be made for borderline applications.