Sumitomo FINE CYCLO FC-A 15 G - Page 24

FINE CYCLO Operating Manual
FC_GB_01_05 NO.991051 Issue: 01/05 page 7
In cases where higher torques than those given in Tab. 2 occur (please refer also to 6.5) or if the
tightening torques of the fasteners can not be relied upon, the use of dowel pins is neccesary.
In this case, please contact Sumitomo Drive Technologies.
In any case the allowable peak torques for emergency stops given in our catalogue are valid.In any case
the allowable peak torques for emergency stops given in our catalogue are valid. See tab. 3 & graph.
Number of
bolts
Bolt size
DIN 4762
Number of
dowel pins
Size of
dowel pins
(mm)
Number of
bolts
Bolt size
DIN 4762
Number of
dowel pins
Size of
dowel pins (mm)
15G 10 M5 2 6 6 M5 2 6
25G 10 M6 2 8 6 M6 2 8
35G 10 M8 2 10 6 M8 2 10
45G 10 M10 2 12 10 M8 2 10
65G 10 M12 2 16 10 M10 2 14
75G 9 M12 3 16 9 M10 3 16
FC-A
Slow speed shaft bolts Ring gear pin
Tab. 3
9.2 FC-A additional dowel pins for applications with peak torques higher than those given in Tab. 2
Tab. 2: Fixing
Number of
bolts
Size
DIN 4762
Tightening torque *
[Nm]
Number of
bolts
Size
DIN 4762
Tightening torque
* [Nm]
15G 12 M5 9.2 8 M5 9.2 470
25G 12 M6 16 8 M6 16 830
35G 12 M8 39 8 M8 39 1900
45G 12 M10 77 12 M8 39 3550
65G 12 M12 135 12 M10 77 7000
75G 12 M12 135 12 M10 77 8000
A
llowable
transmitted torque
by bolts [Nm] T2t
* Screw grade 12.9 - All screws to be used!
FC-A
Slow speed shaft bolts Ring gear housing bolts
Ø A Ø O Ø U
H7/h7 M7/h7 H7/h7
15 G 90 5 15,5 115 45 85 0.030 0.025/ 87
25 G 115 6 21 145 60 110 0.030 0.035/112
35 G 144 6 24 180 80 135 0.030 0.040/137
45 G 182 8 27 220 100 170 0.030 0.050/172
65 G 226 8 33 270 130 210 0.030 0.065/212
75 G 262 8 38 310 150 235 0.030 0.070/237
Location diameter Ø [mm]
Parallelism
b/ with Ø
Concentricity
Ø a
FC-A
Ø d
max.
C
min.
M
+
0,3
Tab. 1: Assembly tolerances
The depth of the output shaft flange recess must be equal to or greater than dimension “C”, acc. to
Tab. 1. To ensure the correct clearance the output flange dimension “M” must be maintained.
The recommended concentricity and parallelism accuracy of the mounting components (housing and
output shaft) should be within the figures “a” and “b”, acc. to tab. 1. The recommended location diam-
eters for the housing output flange and motor input adaptor are “A”, “O” and “U”, acc. to Tab. 1
The location diameter “A” should be fixed to the casing. As there is no sealing between output flange
and ring gear housing, the user should provide sealing when assembling (e.g. liquid sealing Loctite
No. 518 or 573) or O-Ring on customer’s housing.
Motors with standard flange concentricity and squareness tolerances according to DIN 42955 are
acceptable for standard applications. For high precision applications we recommend the use of
motors with reduced concentricity and squareness tolerance in accordance with DIN 42955 R.
Allowable transmitted torque could be limited by mounting bolts. The recommended bolt grade, quantity,
size and tightening torques for the output flange and ring gear housing are shown in Tab. 2.