Shaft End, A-Side; Shaft Seal; Protective Device - Kollmorgen AKM 2G Manuel D'installation

1.4.2.5 Surface
The motors are coated with epoxy powder coating in matte black. This finish is not resistant against
solvents (e.g. trichlorethylene, nitro-thinners, or similar).

1.4.2.6 Shaft end, A-side

Power transmission is made through the cylindrical shaft end A, fit k6 to EN 50347, with a locking thread
but without a fitted keyway.
Motors are also available with keyway and inserted key according to DIN 6885. The shaft with keyway is
balanced with short (half) key.
Bearing life is calculated with 20.000 operating hours.
Order code Shaft end
N Smooth shaft
C Keyway, closed
Radial force
If the motors drive via pinions or toothed belts, then high radial forces will occur. The permissible values
at the end of the shaft may be read from the diagrams in chapter "Drawings" from
The maximum values at rated speed you will find at the technical data from
off from the middle of the free end of the shaft allows a 10% increase in F
Axial force
When assembling pinions or wheels to the axis and use of e.g. angular gearheads axial forces arise. The
maximum values at rated speed are found in the technical data.
Coupling
Double-coned collets have proved to be ideal zero-backlash coupling devices, combined, if required, with
metal bellows couplings. Shaft center hole per DIN 332 Form D.

1.4.2.7 Shaft seal

If AKM2G is connected to a machine flange with unsealed shaft region, then the shaft seal (option "T" or
"V") ensures the shaft sealing.
The "T" seal option is made of mineral filled PTFE seal (Teflon®) which is self-lubricating and is
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recommended for applications where regular lubrication of the shaft seal is not possible.
The "V" seal option is made of Viton® and is recommended for applications where regular
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lubrication of the shaft seal occurs such as lubricated gear boxes.
The shaft seal ensures the IP65 protection for the shaft area.
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The rated performance is achieved after some hours of shaft seal run-in. No special procedure for
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run-in is needed.
Some "shedding" of the shaft seal material, particularly the Teflon material®, is normal and does
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not affect the function.
Shaft seal is pre-lubricated by grease.
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1.4.2.8 Protective Device

The Standard AC voltage version of each motor is fitted with an electrically isolated PT-1000+ PTC. The
Low Voltage version of each motor is fitted with an electrically isolated PT-1000. The thermal sensors do
not provide any protection against short, heavy overloading.
The motor can be delivered with a PT-1000 +PTC, PT-1000, PTC, or KTY 84-130 equivalent sensors
optionally (see Thermal Device Options : Resistance vs. Temperature Graphs
With digital feedback systems SFD3 (CA), Hiperface DSL (GU), and EnDat 2.2 (LD) the temperature
sensor status is transmitted digitally and evaluated in the drive.
Available for
AKM2G 2-7
AKM2G 2-7
Kollmorgen | kdn.kollmorgen.com | August 2020
AKM2G Instructions | 1 English
Dimension drawings.
Technical Data. Power take-
.
R
options 0, 1, 2, and 3).
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