- Parts
- Transfer Cases
- Split-Shaft PTOs
- Speed Reducers & Speed Increasers
- Heavy-Duty Pump Drives
- Custom Transmissions and Gear Drives
Parts, Service, Replacements
800-341-4334 Email UsCotta Transmission Speed Reducers & Speed Increasers
Shop Now ›
Cotta speed reducers match engine speed to driven equipment speed allowing both the engine and load to operate at peak efficiency. These compact and heavy duty gearboxes are designed for use with the commercial offerings of major engine manufacturers.
Cotta engine mounted speed reducers are available with SAE flyweeel housings from #5 to #00, ratios to 8, and horsepower capacity to 2200. Above 2200 HP, remote mount models are generally used.
AR2053A Specifications
CAPACITY (nominal input torque): 300 lb. ft.
MAXIMUM INPUT SPEED: With C108 or C110 clutch - 3000 RPM, With SP111 or SP211 clutch - 2850 RPM
RATIOS: (STANDARD): 1.55, 2.0, (SPECIAL) 1:1, 1.4, 1.63, 1.80, 2.23, 2.50, 3.0 (3.94 is a special ratio - not available with SP211 clutch)
BELL HOUSINGS: SAE #2, #3, #4
CLUTCHES: C108, C110, SP111, SP211
OUTPUT SHAFT: 2.250" diameter, 5" long 5/8 x 5/16 keyway
REAR SUPPORT: 4 holes 1/2-13 on rear cover for customer’s support plate
LUBRICATION: Splash
WEIGHT: 400 lbs
AR2053A Overview
Model AR2053A is a heavy duty reduction gear having anti-engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are tapered roller and the case is heavy cast iron. A wide variety of ratios are available.
AR2053E Specifications
CAPACITY (nominal input torque): 300 lb. ft.
MAXIMUM INPUT SPEED: With C108 or C110 clutch - 3000 RPM, With SP111 or SP211 clutch - 2850 RPM
RATIOS: (STANDARD): 1.55, 1.96, (SPECIAL) 1.42, 1.66, 1.76, 2.20, 2.48, 3.0, 3.42, 3.71 (4.0 is a Special Ratio not available with SP211 clutch)
BELL HOUSINGS: SAE #2, #3, #4
CLUTCHES: C108, C110, SP111, SP211
OUTPUT SHAFT: 2.250" diameter, 5" long 5/8 x 5/16 keyway
REAR SUPPORT: 4 holes 1/2-13 on rear cover for customer’s support plate
LUBRICATION: Splash
WEIGHT: 415 lbs
AR2053E Overview
Model AR2053E is a heavy duty reduction gear having engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are tapered roller and the case is heavy cast iron. A wide variety of ratios are available.
GR15A Specifications
CAPACITY (nominal input torque): 1450 lb. ft.
MAXIMUM INPUT SPEED: 2300 RPM
RATIOS: 1.08, 1.16, 1.26, 1.36, 1.47, 1.60, 1.73, 1.89, 2.05, 2.25, 2.46
BELL HOUSINGS: SAE #1, #1/2, #0, #00
CLUTCHES: IBF214, SP314, SP218 14" and 18" rubber block drives and flywheel couplings
OUTPUT SHAFT: 4.000" diameter, 9" long with 1" x 1/2" keyway
REAR SUPPORT: Two mounting feet provided
LUBRICATION: Lube pump furnished, 25 pints sump capacity
Cooling: A heat exchanger furnished
WEIGHT: 1180 lbs
GR15A Overview
Model GR15A is a heavy duty anti-engine rotation reduction gear. A clutch and bell housing is included for mounting to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are anti-friction and the case is cast iron. A wide variety of ratios are available.
GR15E Specifications
CAPACITY: 1450 lb. ft.
MAXIMUM INPUT SPEED: 2300 RPM
RATIOS: 1.28, 1.40, 1.52, 1.66, 1.82, 2.00, 2.20, 2.43
BELL HOUSINGS: SAE #1, #1/2, #0, #00
CLUTCHES: IBF214, SP314, SP218 14" and 18" rubber block drives and flywheel couplings
OUTPUT SHAFT: 4.000" diameter, 9" long with 1" x 1/2" keyway
REAR SUPPORT: Two mounting feet provided
LUBRICATION: Lube pump furnished, 25 pints sump capacity
COOLING: A heat exchanger furnished
WEIGHT: 1330 lbs
GR15E Overview
Model GR15E is a heavy duty engine rotation reduction gear. A clutch and bell housing is included for mounting to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are anti-friction and the case is cast iron. A wide variety of ratios are available.
GR1600A Specifications
CAPACITY (Maximum input torque): 3000 lb. ft.
MAXIMUM INPUT SPEED: 2200 RPM
RATIOS: 1.35, 1.44, 1.54, 1.65, 1.77, 1.90, 2.21, 2.39, 2.59, 2.81, 3.07
BELL HOUSINGS: SAE #1, #1/2, #0, #00
CLUTCHES: SP314, IBF314, SP218, SP318, IBF318, SP321, 14", 18" and 21" rubber block drives
OUTPUT SHAFT: 4.000" diameter, 9" long with 1" x 1/2" keyway
REAR SUPPORT: Two mounting feet are provided
LUBRICATION: Lube pump is furnished, 32 pints sump capacity
COOLING: A heat exchanger is furnished
WEIGHT: 1600 lbs
GR1600A Overview
Model GR1600A is a heavy duty reduction gear having anti-engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications and are precision ground. The bearings are tapered roller and the case is cast iron. A wide variety of ratios are available.
GR1600E Specifications
CAPACITY (nominal input torque): 2600 lb. ft.
MAXIMUM INPUT SPEED: 2200 RPM
RATIOS:* 1.28, 1.38, 1.48, 1.71, 2.0, 2.17, 2.35, 2.56, 2.80, 3.0
BELL HOUSINGS: SAE #1, #1/2, #0, #00
CLUTCHES: SP314, IBF314, SP218, SP318, IBF318, SP321
OUTPUT SHAFT: 4.000" diameter, 9" long with 1" x 1/2" keyway
GR1600E Overview
Model GR1600E is a heavy-duty reduction gear having engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications and are precision ground. The bearings are tapered roller and the case is cast iron. A wide variety of ratios are available.
GR16A Specifications
CAPACITY (Maximum input torque): 1650 lb. ft.
MAXIMUM INPUT SPEED: 2200 RPM
RATIOS: 1.50, 1.60, 1.72, 1.85, 2.0, 2.16, 2.33, 2.52, 2.75, 3.00
BELL HOUSINGS: SAE #1, #1/2, #0, #00
CLUTCHES: IBF214, SP314, SP218, SP318, 18" rubber block drive
OUTPUT SHAFT: 4.000" diameter, 9" long with 1" x 1/2" keyway
REAR SUPPORT: Two mounting feet provided
LUBRICATION: Lube pump furnished, 32 pints sump capacity
COOLING: A heat exchanger furnished.
WEIGHT: 1380 lbs
GR16A Overview
Model GR16A is a heavy duty anti-engine rotation reduction gear. A clutch and bell housing is included for mounting to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are anti-friction and the case is cast iron. A wide variety of ratios are available.
GR16E Specifications
CAPACITY (Maximum input torque): 1650 lb. ft.
MAXIMUM INPUT SPEED: 2200 RPM
RATIOS: 1.50, 1.66, 1.80, 1.95, 2.11, 2.29, 2.50, 2.73, 3.00
BELL HOUSINGS: SAE #1, #1/2, #0, #00
CLUTCHES: IBF214, SP314, SP218, SP318, 18" rubber block drive
OUTPUT SHAFT: 4.000" diameter, 9" long with 1" x 1/2" keyway
REAR SUPPORT: Two mounting feet provided
LUBRICATION: Lube pump furnished, 32 pints sump capacity
COOLING: A heat exchanger furnished.
WEIGHT: 1530 lbs
GR16E Overview
Model GR16E is a heavy duty engine rotation reduction gear. A clutch and bell housing is included for mounting to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are anti-friction and the case is cast iron. A wide variety of ratios are available.
GR3200A Specifications
CAPACITY (Maximum input torque): 5500 lb. ft.
MAXIMUM INPUT SPEED: 2200 RPM
RATIOS: 1.19, 1.50, 1.80, 1.92, 2.04, 2.18, 2.50, 2.89
BELL HOUSINGS: SAE #0, #00
CLUTCHES: SP318, IBF318, SP321, IBF321, 21" rubber block drives and flywheel couplings
OUTPUT SHAFT: 4.750" diameter with 1.25 x .4375 keyway
REAR SUPPORT: Rear mounting support feet
LUBRICATION: Lube pump is furnished
COOLING: A heat exchanger is furnished
WEIGHT: 1800 lbs
GR3200A Overview
Model GR3200A is a heavy duty reduction gear having anti-engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications and are precision ground. The bearings are taper roller and the case is cast iron. A wide variety of ratios are available.
GR3200E Specifications
CAPACITY (Maximum input torque): 4500 lb. ft.
MAXIMUM INPUT SPEED: 2200 RPM
RATIOS: 1.20, 1.54, 1.64, 1.75, 2.0, 2.14, 2.30, 2.67, 3.0, 3.13
BELL HOUSINGS: SAE #0, #00
CLUTCHES: SP318, IBF318, SP321, IBF321, 21" rubber block drives and flywheel couplings
OUTPUT SHAFT: 4.750" diameter with 1.25 x .4375 keyway
REAR SUPPORT: Rear mounting support feet
LUBRICATION: Lube pump is furnished
COOLING: A heat exchanger is furnished
WEIGHT: 2000 lbs
GR3200E Overview
Model GR3200E is a heavy duty reduction gear having engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications and are precision ground. The bearings are tapered roller and the case is cast iron. A wide variety of ratios are available.
SR2A Specifications
CAPACITY (nominal input torque): 800 lbs ft.
MAXIMUM INPUT SPEED: 3000 RPM
RATIOS: 1.39, 1.61, 1.82, 1.97, 2.55, 3.07
BELL HOUSINGS: SAE #1, #2, #3
CLUTCHES: SP111, SP211, SP114, SP214
OUTPUT SHAFT: 3.000" diameter, 5.5" long 3/4 x 3/8 keyway
REAR SUPPORT: 4 holes 1/2-13 on rear cover for customer’s support plate
LUBRICATION: Splash
WEIGHT: 775 lbs
SR2A Overview
Model SR2A is a heavy duty reduction gear having anti-engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are tapered roller and the case is heavy cast iron. A wide variety of ratios are available.
SR2E Specifications
CAPACITY (nominal input torque): 600 lb. ft.
MAXIMUM INPUT SPEED: 3000 RPM
RATIOS: 1.42, 1.60, 1.81, 1.97, 2.47, 3.00
BELL HOUSINGS: SAE #1, #2, #3
CLUTCHES: SP111, SP211, SP114, SP214
OUTPUT SHAFT: 3.000" diameter, 5.5" long 3/4 x 3/8 keyway
REAR SUPPORT: 4 holes 1/2-13 on rear cover for customer’s support plate
LUBRICATION: Splash
WEIGHT: 800 lbs
SR2E Overview
Model SR2E is a heavy duty reduction gear having engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are tapered roller and the case is heavy cast iron. A wide variety of ratios are available.
SR3A Specifications
CAPACITY (nominal input torque): 1400 lb. ft.
MAXIMUM INPUT SPEED: 3000 RPM
RATIOS: 1.38, 1.58, 1.82, 2.00, 2.44, 3.04
BELL HOUSINGS: SAE #1, #2, #0
CLUTCHES: SP211, SP114, SP214, SP314, SP218
OUTPUT SHAFT: 3.500" diameter, 5" long 7/8 x 7/16 keyway
REAR SUPPORT: 4 holes 5/8-11 on rear cover for customer’s support plate
LUBRICATION: Splash
WEIGHT: 940 lbs
SR3A Overview
Model SR3A is a heavy duty reduction gear having anti-engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are tapered roller and the case is heavy cast iron. A wide variety of ratios are available.
SR3E Specifications
CAPACITY (nominal input torque): 900 lb. ft.
MAXIMUM INPUT SPEED: 3000 RPM
RATIOS: 1.20, 1.38, 1.59, 1.84, 2.03, 2.52, 3.00
BELL HOUSINGS: SAE #1, #2, #0
CLUTCHES: SP211, SP114, SP214, SP314, SP218
OUTPUT SHAFT: 3.500" diameter, 5" long 7/8 x 7/16 keyway
REAR SUPPORT: 4 holes 5/8-11 on rear cover for customer’s support plate
LUBRICATION: Splash
WEIGHT:975 lbs
SR3E Overview
Model SR3E is a heavy duty reduction gear having engine rotation that includes a clutch and mounts to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are tapered roller and the case is heavy cast iron. A wide variety of ratios are available.
SR700A Specifications
CAPACITY (nominal input torque): 650 lb. ft.
MAXIMUM INPUT SPEED: 2500 RPM
RATIOS: 1.50, 1.61, 1.73, 1.86, 2.00
BELL HOUSINGS: SAE #1
CLUTCHES: SP211, SP114, SP214, pilot bearing provided to meet engine specifications
OUTPUT SHAFT: 3.000" diameter, 5.5" long 3/4 x 3/8 keyway
REAR SUPPORT: 6 holes on a 10.125" B.C. for customer’s support plate
LUBRICATION: Splash, 7 quarts sump capacity
WEIGHT: 510 lbs
SR700A Overview
Model SR700 is a heavy duty reduction gear available in engine rotation (SR700E) or anti-engine rotation (SR700A). A clutch and bell housing is included for mounting to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are anti-friction and the case is cast iron. A wide variety of ratios are available in either direction of rotation.
SR700E Specifications
CAPACITY (nominal input torque): 650 lb. ft.
MAXIMUM INPUT SPEED: 2500 RPM
RATIOS: 1.43, 1.55, 1.67, 1.80, 1.95
BELL HOUSINGS: SAE #1
CLUTCHES: SP211, SP114, SP214, pilot bearing provided to meet engine specifications
OUTPUT SHAFT: 3.000" diameter, 5.5" long 3/4 x 3/8 keyway
REAR SUPPORT: 6 holes on a 10.125" B.C. for customer’s support plate
LUBRICATION: Splash, 7 quarts sump capacity
WEIGHT: 560 lbs
SR700E Overview
Model SR700 is a heavy duty reduction gear available in engine rotation (SR700E) or anti-engine rotation (SR700A). A clutch and bell housing is included for mounting to an engine for a compact package with proper alignment. The gears are helical and carburized for ultimate strength and endurance. Gears are designed per AGMA specifications. The bearings are anti-friction and the case is cast iron. A wide variety of ratios are available in either direction of rotation.
Palmer Johnson Location
Service Dealers
