Eaton FSO-2105 - Gear Ratio

Identication
4
Ratio: Gear ratio. It is calculated by dividing the number of teeth in driven gear by the number of teeth in drive
gear, and then multiplying by the input gear pair ratio.
Example:
FSO-2105
Input pair: Input shaft = 26 teeth; = 37 teeth => 37/26 = 1.423 ~
First gear: Countershaft = 14 teeth; Mainshaft = 44 teeth => 44/14= 3.143 ~
1.423 x 3.143 = 4.472 ~
FSO 2105 FSO 2505
A A B
Torque
N.m 270 440 440
Lb.ft 200 325 325
ND Ratio ND Ratio ND Ratio
Input shaft 26 26 26
Countershaft 37 37 37
1st (CE)
(EP)
14
44
4.47
15
43
4.08
15
43
4.08
2nd (CE)
(EP)
22
38
2.46
23
37
2.29
23
37
2.29
3rd (CE)
(EP)
29
30
1.47
29
30
1.47
29
30
1.47
4th (CE)
(EP)
-
-
1.00
-
-
1.00
-
-
1.00
5th (CE)
(EP)
45
26
0.82
53
27
0.72
51
29
0.81
Reverse (CE)
(RV)
(EP)
12
29
32
3.79
12
29
32
3.79
12
29
32
3.79
ND = Number of teeth in gear
CE = Countershaft
EP = Mainshaft
RV = Reverse idle gear
Gear Ratio