Chapter 5 Installation
21
Chapter 5 Installation
This chapter describes the installation of this product.
Before installation, take care regarding the following precautions.
• Do not stand on top of the reduction gear or put anything on it.
• Be sure to install the reduction gear with the correct orientation.
Standing on top of the reduction gear or putting something on it could cause damage to the
reduction gear.
Installing the reduction gear with an incorrect orientation could cause damage to the customer’s
device and the reduction gear.
5.1. Bolt tightening torque
• Use the Nabtesco-recommended bolts for installing the reduction gear and tighten them with the specified
tightening torque.
• Use the serrated lock washer for a hexagon socket head cap screw to prevent the bolt from loosening and
protect the bolt seat surface from flaws.
(Reference: “4.2.3 Reduction gear installation bolts” and “4.2.4 Serrated lock washer for hexagon socket head
cap screw”)
The following are the bolt tightening torques specified by Nabtesco. Be sure to check the following when
tightening the bolts.
Table 5-1
Nominal size ×
pitch
(mm)
Tightening torque*
(Nm)
Tightening force
(N)
M5 × 0.8
9.01 ± 0.49
9,310
M6 × 1.0
15.6 ± 0.78
13,180
M8 × 1.25
37.2 ± 1.86
23,960
M10 × 1.5
73.5 ± 3.43
38,080
M12 × 1.75
129 ± 6.37
55,100
M14 × 2.0
205 ± 10.2
75,860
M16 × 2.0
319 ± 15.9
103,410
M18 × 2.5
441 ± 22.0
126,720
M20 × 2.5
493 ± 24.6
132,170
* The tightening torque values listed are for steel or cast iron material.
If softer material, such as aluminum or stainless steel, is used, limit the tightening torque. When
tightening the bolt with the limited torque, confirm that there is no strength problem by taking the
transmission torque and load moment into due consideration.
Note
Important
