RM Gearbox

The Twin Disc RM20 series is a gearbox product with speed reduction and speed increasing ratios comprising of the RM20S & RM20D models. 

The “S” & “D” in the model number refers to the rotation of the output shaft. 

  • S = rotation is the same as the engine
  • D = rotation is anti-engine


The Twin Disc RM series gearboxes are compact, yet heavy duty gearboxes built for industrial application to mount with industrial diesel engines or electric motors. The Twin Disc RM gearboxes are a very economical option for an array of industrial off-highway applications including water pumps, slurry pumps, fans, blowers, cement mixers, and more.

One of the best features of these gearboxes are their modular design built to be flexible and configurable for the widest range of industrial applications. Each series has the option for the output shaft to turn engine or ant-engine direct. There are an array of engine connection options including drive plate/coupling mounted, and clutch mounted to an industrial SAE engine.

The RM20 series is offered in ratios ranging from 0.57:1 increasing to a 2.71:1 reduction ratio and is rated for up to 56 lb-ft of input torque.

Whether you're working on a new application and need help selecting the right Twin Disc RM20 gearbox, or you need support for an existing unit in your equipment, our experts are here to help. Get in touch with the gearbox experts today!

Models:

RM20D

Ratio
(X :1)
Part Number Configuration Max. Input Torque
Nm (lb-ft)
Max. Power Allowed
Without Heat Exchanger
kW (hp)
Maximum
Input Shaft
Speed
SAE
Housing
Flywheel
Size
0.57 ITR11311004 Housing 75 (56) 15 (20) 2700 5 6.5″
1 ITR11311005 Housing 75 (56) 15 (20) 3500 5 6.5″
2 ITR11311006 Housing 55 (41) 15 (20) 3500 5 6.5″
2.71 ITR11311007 Housing 50 (37) 15 (20) 3500 5 6.5″
0.57 ITR11321004 Housing 75 (56) 15 (20) 2700 5 7.5″
1 ITR11321005 Housing 75 (56) 15 (20) 3500 5 7.5″
2 ITR11321006 Housing 55 (41) 15 (20) 3500 5 7.5″
2.71 ITR11321007 Housing 50 (37) 15 (20) 3500 5 7.5″
0.57 ITR11111004 with BD110 PTO 75 (56) 15 (20) 2700 5 6.5″
1 ITR11111005 with BD110 PTO 75 (56) 15 (20) 3500 5 6.5″
2 ITR11111006 with BD110 PTO 55 (41) 15 (20) 3500 5 6.5″
2.71 ITR11111007 with BD110 PTO 50 (37) 15 (20) 3500 5 6.5″
0.57 ITR11111104 with BD110 PTO 75 (56) 15 (20) 2700 5 7.5″
1 ITR11111105 with BD110 PTO 75 (56) 15 (20) 3500 5 7.5″
2 ITR11111106 with BD110 PTO 55 (41) 15 (20) 3500 5 7.5″
2.71 ITR11111107 with BD110 PTO 50 (37) 15 (20) 3500 5 7.5″
0.57 ITR11122004 with BD112 PTO 75 (56) 15 (20) 2700 4 7.5″
1 ITR11122005 with BD112 PTO 75 (56) 15 (20) 3500 4 7.5″
2 ITR11122006 with BD112 PTO 55 (41) 15 (20) 3500 4 7.5″
2.71 ITR11122007 with BD112 PTO 50 (37) 15 (20) 3500 4 7.5″
0.57 ITR11220004 with BDS112 Remote PTO 75 (56) 15 (20) 2700 N/A N/A
1 ITR11220005 with BDS112 Remote PTO 75 (56) 15 (20) 3500 N/A N/A
2 ITR11220006 with BDS112 Remote PTO 55 (41) 15 (20) 3500 N/A N/A
2.71 ITR11220007 with BDS112 Remote PTO 50 (37) 15 (20) 3500 N/A N/A

RM20S

Ratio
(X :1)
Part Number Configuration Max. Input Torque
Nm (lb-ft)
Max. Power Allowed
Without Heat Exchanger
kW (hp)
Maximum
Input Shaft
Speed
SAE
Housing
Flywheel
Size
0.64 ITR11311003 Housing 75 (56) 12 (16) 2800 5 6.5″
1.89 ITR11311001 Housing 55 (41) 12 (16) 3500 5 6.5″
2.47 ITR11311002 Housing 50 (37) 12 (16) 3500 5 6.5″
0.64 ITR11321003 Housing 75 (56) 12 (16) 2800 5 7.5″
1.89 ITR11321001 Housing 55 (41) 12 (16) 3500 5 7.5″
2.47 ITR11321002 Housing 50 (37) 12 (16) 3500 5 7.5″
0.64 ITR11111003 with BD110 PTO 75 (56) 12 (16) 2800 5 6.5″
1.89 ITR11111001 with BD110 PTO 55 (41) 12 (16) 3500 5 6.5″
2.47 ITR11111002 with BD110 PTO 50 (37) 12 (16) 3500 5 6.5″
0.64 ITR11111103 with BD110 PTO 75 (56) 12 (16) 2800 5 7.5″
1.89 ITR11111101 with BD110 PTO 55 (41) 12 (16) 3500 5 7.5″
2.47 ITR11111102 with BD110 PTO 50 (37) 12 (16) 3500 5 7.5″
0.64 ITR11122003 with BD112 PTO 75 (56) 12 (16) 2800 4 7.5″
1.89 ITR11122001 with BD112 PTO 55 (41) 12 (16) 3500 4 7.5″
2.47 ITR11122002 with BD112 PTO 50 (37) 12 (16) 3500 4 7.5″
0.64 ITR11220003 with BDS112 Remote PTO 75 (56) 12 (16) 2800 N/A N/A
1.89 ITR11220001 with BDS112 Remote PTO 55 (41) 12 (16) 3500 N/A N/A
2.47 ITR11220002 with BDS112 Remote PTO 50 (37) 12 (16) 3500 N/A N/A

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