Mechanical design

• Constructions
• Ball bearings
• Types of protection
• Types of cooling
• Noise values

 

— Ball bearings—
Bearing components and admissible load of the shaft end

	Size	Bearing Type	Grease Quantitiy g	approx. 3000 / min.		approx. 1500 / min.		approx. 1000 / min.		Rotor Weight max. N
				Fa N	Fr N	Fa N	Fr N	Fa N	Fr N
Con- struction DN / EN	63	6202-Z	1,1	140	250	180	310	200	360	11
	71	6203-Z	1,6	170	310	210	390	250	450	20
	80	6204-Z	2,6	220	410	280	520	320	590	36
	90	6205-Z	3,1	260	480	330	600	370	690	52
	100	6206-Z	4,8	360	670	450	840	520	970	82
	112	6207-Z	4,8	360	690	450	870	520	1000	116
	132	6208-Z	15,0	770	1400	970	1760	1110	2020	210
	160	6209-Z	19,0	1000	1800	1250	2200	1440	2630	400

Radial clearance: normal design, series DN: C3; servo-motors and torque motors: C 4 resp. C 5

The table includes the bearings installed ex works in the standard design.
Motors for special purposes can include other bearings. When ordering spare parts, we therefore need the motor number in order to determine the actually installed bearings.
The data on the admissible load refer to the customary applications (practically uniform load, operation in normal temperature and humidity range) with a bearing lifetime of approx. 20 000 hours.
If the stated values are only slightly exceeded, an adequate lifetime also can be attained with the standard bearings if the actual load is exactly calculated.

 

ATTENTION: With a vertical installation, the rotor weight must be taken into consideration when determining the axial load. With constructions with the shaft pointing upwards or with an axial force directed on the motor, please contact us.

The bearings are provided with a permanent lubrication. As the ambient temperatures can lead to a not always foreseeable impairment of the grease lifetime, at least an annual checking and if necessary new greasing of the bearings is recommendable.

The bearings are filled with the following - or technical equivalent - greases ex works:

Standard	SHELL Alvania R 3 (Lithium-grease)
Servo-motors	Mobil Oil Mobiltemp. SHC 100 (synth. grease)
Torque motors
Reluctance motors

When newly greasing the bearings, it must be ensured that the same resp. technically equivalent greases are used.
The stated grease quantities in no case should be exceeded as too large quantities of grease lead to louder running noises and to grease running out.

Special designs

• Motors for higher speeds (n > 3600 min¨¹)
• Motors for relubricating devices
• Motors for special applications (higher load than those mentioned above)
• Motors for speed-variable drives (FU) eventually necessitate, under consideration of the special conditions, individual solutions with regard to the bearing arrangement / lubrication. In such cases, please do not hesitate to contact us and give us, if possible, an exact description of the application.