Product Description
R F K S Series Industrial Gear Motor Reducer
This product line comprises four major series of hardened helical gear reducers – R, F, K, and S – engineered to deliver reliable power transmission in demanding industrial environments. Each series features a rugged gearbox constructed with hardened helical gears, ensuring high torque capacity, smooth operation, and extended service life. The reducers are offered without motors (motor‑not‑included configuration), providing flexibility for system integration and allowing users to pair them with preferred drive units. Available models span a wide range of sizes and ratios, including the comprehensive K series (K/KA/KF/KAF models from size 37 to 187) and full ranges of R and F series. Custom configurations for R, S, and F series are also supported. Ideal for applications requiring precise speed reduction, high load‑carrying ability, and robust construction, these gearboxes are backed by professional technical support and tailored pricing upon inquiry.
S Series
F Series
R Series
Functional Features
K/R/F/S Four Major Series
Hardened Gear Reducer
High Torque
Stable Operation
Four Core Advantages
High Torque, High Load Capacity
High Efficiency, Stable Operation
Low Vibration, Low Noise
Wide Ratio Range, Detailed Grading
High Output Torque
High Load Capacity
High‑Precision Helical Gear and Bevel Gear Transmission
Torque up to 50,000 Nm
High Transmission Efficiency
Stable Operation
Three‑Stage Gear Reduction in Enclosed Housing
High Meshing Transmission Efficiency
Efficiency Exceeds 94%
Low Operating Vibration & Noise
High‑Strength Gear Shaft
Precision Machining Ensures
Stable Transmission and Low Noise
Noise Level: 90 dB
Typical other reducers: 70‑80 dB
TransRex Reducer Noise Level: Below 70 dB
Wide Transmission Ratio Range, Fine Grading
K Series i = 5.36‑197.36
R Series i = 3.37‑289.74
F Series i = 3.77‑281.71
S Series i = 6.8‑288
Product Views
High Rigidity High‑Standard Output Shaft
Gray Cast Iron Housing Smooth Operation
High‑Strength Bearings Modular Design
Large Output Torque Direct Motor Connection Possible
Diverse Mounting Options:Horizontal – Foot Mounting&Vertical – Flange Mounting
Customizable:Multiple Specifications & Models
Cast Iron Housing Helical Gear Helical Gear Cooling Cover
Output Shaft Oil Seal Bearing Helical Gear
Note: Motor must be purchased separately. Please contact customer service for details
Product parameters
K-Series | ||||||
Specification | K37 | K47 | K57 | K67 | K77 | K87 |
Input Power (kW) | 0.18-3 | 0.18-3 | 0.18-5.5 | 0.18-5.5 | 0.37-11 | 0.75-22 |
Gear Ratio | 5.36-106.38 | 5.18-131.87 | 6.57-145.14 | 7.28-144.79 | 7.24-192.18 | 7.21-197.37 |
Maximum Torque (N・m) | 200 | 400 | 600 | 820 | 1550 | 2700 |
Specification | K97 | K107 | K127 | K157 | K167 | K187 |
Input Power (kW) | 1.1-30 | 3-45 | 7.5-90 | 11-160 | 11-200 | 18.5-200 |
Gear Ratio | 8.71-176.05 | 8.69-143.47 | 8.68-146.07 | 12.56-150.41 | 17.34-164.50 | 17.18-179.86 |
Maximum Torque (N・m) | 4300 | 8000 | 13000 | 18000 | 32000 | 50000 |
R-Series | |||||||
Specification | R17 | R27 | R37 | R47 | R57 | R67 | R77 |
Input Power (kW) | 0.12-0.75 | 0.12-3 | 0.12-3 | 0.12-5.5 | 0.12-7.5 | 0.12-7.5 | 0.18-11 |
Gear Ratio | 3.83-81.64 | 3.37-135.09 | 3.41-154.82 | 3.83-176.88 | 4.39-186.89 | 4.29-199.81 | 5.31-195.24 |
Maximum Torque (N・m) | 85 | 130 | 200 | 300 | 450 | 600 | 820 |
R-Series | ||||||
Specification | R87 | R97 | R107 | R137 | R147 | R167 |
Input Power (kW) | 0.55-22 | 0.55-30 | 2.2-45 | 5.5-55 | 11-90 | 11-160 |
Gear Ratio | 5.3-246.54 | 4.5-289.74 | 4.92-251.15 | 5.15-222.6 | 5-163.31 | 0.24-229.71 |
Maximum Torque (N・m) | 1550 | 3000 | 4300 | 8000 | 13000 | 18000 |
F-Series | |||||
Specification | F37 | F47 | F57 | F67 | F77 |
Input Power (kW) | 0.18-3 | 0.18-3 | 0.18-5.5 | 0.18-5.5 | 0.37-11 |
Gear Ratio | 3.77-128.51 | 4.99-190.76 | 5.18-199.70 | 3.97-228.99 | 4.28-281.71 |
Maximum Torque (N・m) | 200 | 400 | 600 | 820 | 1500 |
Specification | F87 | F97 | F107 | F127 | F157 |
Input Power (kW) | 0.75-22 | 1.1-30 | 2.2-45 | 7.5-90 | 11-200 |
Gear Ratio | 4.12-270.68 | 4.57-276.77 | 6.22-254.40 | 4.68-170.83 | 11.92-267.43 |
Maximum Torque (N・m) | 3000 | 4300 | 7840 | 12000 | 18000 |
R-Series | |||||||
Specification | R17 | R27 | R37 | R47 | R57 | R67 | R77 |
Input Power (kW) | 0.12-0.75 | 0.12-3 | 0.12-3 | 0.12-5.5 | 0.12-7.5 | 0.12-7.5 | 0.18-11 |
Gear Ratio | 3.83-81.64 | 3.37-135.09 | 3.41-154.82 | 3.83-176.88 | 4.39-186.89 | 4.29-199.81 | 5.31-195.24 |
Maximum Torque (N・m) | 85 | 130 | 200 | 300 | 450 | 600 | 820 |
R-Series | ||||||
Specification | R87 | R97 | R107 | R137 | R147 | R167 |
Input Power (kW) | 0.55-22 | 0.55-30 | 2.2-45 | 5.5-55 | 11-90 | 11-160 |
Gear Ratio | 5.3-246.54 | 4.5-289.74 | 4.92-251.15 | 5.15-222.6 | 5-163.31 | 0.24-229.71 |
Maximum Torque (N・m) | 1550 | 3000 | 4300 | 8000 | 13000 | 18000 |
Note:Send inquiry for more details.
Company Introduction
Founded in 2015, TransRex specializes in providing precision transmission solutions for industrial applications. Our core products include worm gear reducers, high-precision reducers, planetary gear reducers, robotic reducers, hardened gear reducers (K/F/R/S series), and integrated adjustable/fixed speed gearmotors, along with a wide range of transmission components. We are committed to delivering reliable, efficient, and customized drive systems to meet the evolving needs of global industries.
