Nabtesco RV E Series - Page 82

Appendix: Design Scheme of Input Gear
74

Pass-through capacity of input gear
The following table shows which ratios can and cannot allow the input gear to pass through.
(Unit: mm)
Model
Hole
diameter
Depth Speed ratio adequate for shaft passage
Speed ratio inadequate for
shaft passage
d1 d2 1 2 Shaft rotation Case rotation Shaft rotation
Case
rotation
RV-6E 19 21 18 - 53.5, 59, 79, 103 52.5, 58, 78, 102 31.43 30.42
RV-20E, RV-15 22 24 18.5 18.5 81, 105, 121, 141 80, 104, 120, 140 57 56
RV-40E, RV-30 27 30 23.5 19.5 81, 105, 121, 153 80, 104, 120, 152 57 56
RV-80E, RV-60 37 40 23 17.5 81, 101, 121, 153 80, 100, 120, 152 57 56
RV-110E 39 42 20 - 81, 111, 127.7, 161, 175.2 80, 110, 126.7, 160, 174.2 - -
RV-160E,
RV-160
43 47 30 22 81, 101, 129, 145, 171 80, 100, 128, 144, 170 66 *1 65 *1
RV-320E,
RV-320
47
52 34 28.3
81, 101, 118.5, 129, 141, 171,
185
80, 100, 117.5, 128, 140, 170,
184
66 *1 65 *1
RV-450E,
RV-450
57 62 40 28.5
81, 101, 118.5, 129, 154.8,
171, 192.42
80, 100, 117.5, 128, 153.8,
170, 191.42
66 *1 65 *1
RV-550 66 72 - - 123, 141, 163.5, 192.42 122, 140, 162.5, 191.42 - -
*1 It is not included in the input gear tooth specifications. For any requests, contact us.
As the speed ratio becomes smaller, the outer diameter of the spur gear teeth of the input gear becomes larger. Therefore, it is
impossible to install the input gear by means of passing through the reduction gear.
In such a case, prepare the deep groove ball bearing and C type retaining ring according to the illustration below.
The dimensions of the standard input spline are marked with * on pages 73 and 74.
1 = E type
2 = Original type
Input spline
Input gear
C type retaining
ring for hole
C type
retaining ring
for shaft
Deep groove ball bearing