RA-EA / EC
Solid shaft gearheads

Powerhouses for machine tools

RA-EA and RA-EC gears are specially designed for positioning magazines in machine tools. A motor flange or pinion enables their rapid and simple integration in tool-changing systems for disc and chain magazines (ATC – Automatic Tool Changer).

Solid shaft precision gears, cost-effective installation

High shock-load capability (up to 5 times the rated torque), high rigidity

High precision (hysteresis loss < 1 arcmin), low inertia

Easy to integrate

The precision gears of the RH-EA/EC series offer impressive rigidity and shock-load capability (up to 5 times the rated torque). Their precision, with a hysteresis loss of less than 1 arcmin, is likewise unusually high.

Users also benefit from low mass inertia and cost-effective installation in the machine tool or pallet changer system.

 

Applications for RA-EA / EC solid shaft gearheads

 

 

Machine tool building

Tool magazines

Automatic Tool Changer

Which gearbox fits your application best? Find your optimum gear with just a few clicks.

Technical data

Specifications of RA-EA, RA-EC
Model RA-20EA / 20EC40EA / 40EC80EA / 80EC160EA / 160EC
Standard ratioEA1 80 / 104 / 120 / 160 80 / 104 / 120 / 152 80 / 100 / 120 / 152 80 / 100 / 128 / 144 / 170
EC2 81 / 105 / 121 / 161 81 / 105 / 121 / 153 81 / 101 / 121 / 153 81 / 101 / 129 / 145 / 171
Rated torque (Nm) 167 412 784 1.568
Allowable acc. / dec. torque (Nm) 412 1.029 1.960 3.920
Emergency stop torque (Nm) 833 2.058 3.920 7.840
Max. speed switching operation (rpm) 75 70 70 45
Hysteresis loss (arcmin) <1,0 <1,0 <1,0 <1,0
Torsional rigidity (Nm / arcmin) 49 108 196 392
Moment rigidity (Nm / arcmin) 882 1.666 2.156 3.920
Main bearing
capacity
Allowable moment (Nm) 1.764 3.332 4.312 7.840
Axial load (N) 3.920 5.194 7.840 14.700
1EA = case rotation / 2EC = shaft rotation
Dimensions RA-EA
Model RA-20EA40EA80EA160EA
Weight (kg) 14 25 35 77
A (Ø mm) 175 230 260 325
B h7 (Ø mm) 140 180 210 270
C (Ø mm) 100 140 170 180
D (Ø mm) 145 190 222 280
E h7 (Ø mm) 124 160 190 240
F (mm) 17 14 16 15
G (mm) 93,6 119,1 127 171
H (mm) 47,5 63,5 55,2 59,9
I (mm) 24,5 24 37 60,5
J (mm) 10 13 14 18
K (mm) 20 14 15 38
L (mm) 10 10 10 15
M (°) 60 60 45 30
N (Ø mm) 160 210 240 300
O (Ø mm) 6xØ9 6xØ11 8xØ11 12xØ13
         
         
Dimensions of RA-EC
Model RA-20EC40EC80EC160EC
Weight (kg) 14 25 35 71
A (Ø mm) 150 192 226 290
B h7 (Ø mm) 145 190 222 280
C (Ø mm) 124 160 190 240
D (Ø mm) 110 140 170 210
E h7 (Ø mm) 40 50 80 100
F (mm) 59,1 65 77 108
G (mm) 59 78 72 88,5
H (mm) 32 37 33 42,5
I (mm) 24,5 24 37 60,5
J (mm) 20 24 15 20
K (mm) 25 38 40 33
L (mm) 10 10 10 10
M (mm) 10 10 10 15
N (mm) 6 6 6 8
O (°) 30 30 20 37,5
P (Ø mm) 90 110 136 180
Q (Ø mm) 4xM10 6xM12 9xM12 6xM16

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