Chapter 4
Preparations for installation
12
4.2.4. O-ring
If the reduction gear is shaped in a way that its shaft side is not hermetically sealed (refer to Fig. 2-6), it is
necessary to seal the shaft mounting surface. Use the O-rings indicated in the separately provided “Outer
dimensions” drawings and specification sheet. If there is no indication, select the size of the O-ring
appropriate for the surface to be sealed. If an O-ring cannot be used due to the structure, seal the section
using a liquid sealant, etc.
If it is difficult to purchase any of the O-rings described in the “Outer dimensions” drawings and
specification sheet, select an O-ring based on the design standard of each manufacturer by
referring to the dimensions listed above. Failure to do so could cause the leakage of lubricant.
4.2.5. Liquid sealant
When sealing the shaft mounting surface of the reduction gear and shaft installation component using
liquid sealants, prepare the following liquid sealants recommended by Nabtesco.
Table 4-2
Name
Manufacturer
Characteristics and applications
ThreeBond 1211
ThreeBond
• Silicone-based, solventless type
• Semi-dry gasket
HermeSeal SS-60F
Nihon Hermetics Co.
• One-part, non-solvent elastic sealant
• Metal contact surface (flange surface) seal
• Any product basically equivalent to
ThreeBond 1211
Loctite 515
Henkel
• Anaerobic flange sealant
• Metal contact surface (flange surface) seal
Do not use the above liquid sealants if the component of the customer’s device is made of copper or
copper alloy.
Note
Note
