Epson G Series Maintenance Manual page 349

*5 Regarding purchase of grease
Due to the chemicals regulations of individual countries (the UN GHS), we are requesting our customers to
purchase the grease required for maintenance from the manufacturers listed in the table below as of April 2015.
Regarding purchase of the grease, please contact the following manufacturers. If there is anything unclear,
please contact the supplier of your region.
Product name
THK AFB-LF Grease
Harmonic Grease SK-1A
Krytox®GPL-224
Reduction Gear Unit
**
A reduction gear unit consists of the following three parts. When replacing the reduction
gear unit, be sure to always replace the waveform generator, flexspline, and circular spline
all together as one set.
Waveform generator
This waveform generator consists of an ellipsoidal cam with ball bearings on its outer
circumference.
The inner ring of bearings is secured to the cam, while the outer ring is capable of flexible
deformation through the ball bearings.
Flexspline
A thin, elastic, cup-shaped metal body with gear
teeth around the outer circumference of the
opening.
Circular spline
A rigid, ring-shaped body with gear teeth on the
inner circumference.
The circular spline has two more teeth than the
flexspline does.
The splines are greased. Be sure to keep the grease from being attaching to the clothes.
G series Maintenance Rev.3
G6 Maintenance 14. G6 Maintenance Parts List
Manufacturer
THK CO., LTD.
Harmonic Drive Systems Inc.
Chemours
URL
https://www.thk.com/
https://www.harmonicdrive.net/
https://www.chemours.com/en/brands-
and-products
Waveform generator
Circular spline Flexspline
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