Chapter 4 Preparations for Installation
13
4.2.5. O-rings
Use the O-rings indicated in the separately provided “External dimensions” drawings and specification sheet. If
there is no indication, select the size of the O-ring appropriate for the surface to be sealed.
For the catalog products described in “2.2. Parts codes of catalog products”, prepare the O-rings with the
numbers listed in Table 4-5 and Table 4-6.
If it is difficult to purchase the O-rings in the table below, select an O-ring based on the design
standard of each manufacturer by referring to the listed dimensions. Selecting an inappropriate
O-ring could cause leakage of the lubricant.
O-ring (I)
Prepare an O-ring (I) for sealing the installation section of the reduction gear and motor mounting flange. The
O-rings applicable to the O-ring (I) for the catalog products described in “2.2 Parts codes of catalog products”
are listed in the table below. If an O-ring cannot be used due to the structure, seal the section using a liquid
sealant, etc.
(Reference: “4.2.6 Liquid sealant”)
O-ring (I)
JIS B 2401: 2012, SAE AS568
Table 4-5
(Unit: mm)
(Unit: mm)
Model
O-ring
number
O-ring dimensions
Model
O-ring
number
O-ring dimensions
Inside
diameter
Width
Inside
diameter
Width
RV-25N
S110*
ø109.5
ø2.0
RV-125N
AS568-167
ø177.47
ø2.62
RV-42N
AS568-159
ø126.67
ø2.62
RV-160N
AS568-170
ø196.52
ø2.62
RV-60N
AS568-258
ø151.99
ø3.53
RV-380N
AS568-272
ø240.89
ø3.53
RV-80N
AS568-258
ø151.99
ø3.53
RV-500N
AS568-275
ø266.29
ø3.53
RV-100N
AS568-166
ø171.12
ø2.62
RV-700N
G340
ø339.3
ø5.7
* S110 is the manufacturer’s own standard.
O-ring (II)
Prepare an O-ring (II) for sealing the mounting surface of the reduction gear and shaft installation component.
The O-rings applicable to the O-ring (II) for the catalog products described in “2.2 Parts codes of catalog
products” are listed in the table below. If an O-ring cannot be used due to the model and the structure, seal the
section using a liquid sealant, etc.
(Reference: “4.2.6 Liquid sealant”)
Note
