AT-L1 / AT-R1 Series Right Angle Servo Gearbox – Single Output Shaft Type

Product Overview

The AT-L1 (Left Output) and AT-R1 (Right Output) Series right angle servo gearbox is a high-precision right-angle reducer specifically engineered for industrial automation, motion control systems, and high-load servo applications. Designed with helical bevel gears, planetary mechanisms, and high-rigidity bearing structures, these right-angle gear reducers deliver exceptional torque capacity, efficiency, and durability.

With a robust SCM415 nickel-chromium alloy steel gear set hardened to HRC 60, the AT series right angle servo gearbox guarantees stable transmission, long service life, and precise positioning performance. The combination of a helical planetary stage and precision spiral bevel stage provides extremely smooth rotation, low noise, and high transmission efficiency, making the AT-L1 / AT-R1 series an ideal solution for demanding servo-driven machines.

Available in frame sizes AT065 to AT280, the series supports reduction ratios from 1:3 to 1:10 in single-stage models and 1:12 to 1:100 in two-stage configurations. With rated output torque ranging from 15 Nm to 1600 Nm, the AT right-angle gearbox provides the versatility needed for compact machinery, automation equipment, conveyors, robotic arms, and CNC systems.

The AT-L1 / AT-R1 series right angle servo gearbox is widely adopted in industries such as packaging automation, semiconductor equipment, industrial robotics, steel manufacturing, and precision material handling.

For deeper technical understanding of bevel gears and right angle transmission principles, you may refer to the educational resources provided by MIT OpenCourseWare – Mechanical Design

Key Features

  • High Strength Gear Construction
    The AT series right angle servo gearbox utilizes high-precision spiral bevel gears manufactured from SCM415 Cr-Mo alloy steel and heat-treated to HRC 60. This provides: Excellent wear resistance; High shock load capability; Long operating life even under heavy torque; Smooth and quiet operation due to optimized gear geometry. The hardened gear structure ensures long-term reliability in high-performance servo systems.
  • High Efficiency Transmission System
    The right angle servo gearbox features a combination of: High-efficiency planetary mechanism; Precision spiral bevel gear stage
    This engineered combination maximizes torque density and maintains ≥98% efficiency across all frame sizes and ratios. The design ensures stable speed reduction with minimal backlash and heat loss. To learn more about planetary gear mechanisms, see the NASA Gear Technology Handbook.
  • High Rigidity Structure for Heavy Loads
    The AT-L1 / AT-R1 right angle servo gearbox is built with: Dual conical (tapered) bearings supporting the output shaft; Reinforced housing engineered for minimal deflection; High-load output shaft configuration; Excellent radial and axial load capacity. This makes the AT series suitable for applications where output load changes frequently or where machinery requires consistent precision under high external forces.
  • Multiple Output Shaft Configurations
    The AT series offers versatility to meet various machine design requirements: Single output shaft (AT-L1 / AT-R1); Double output shaft; Hollow shaft type; Hollow flange output; Shrink disk conical clamping hollow shaft; Screw linear type; Thread linear type. This wide variety allows the AT series to integrate into almost any servo-driven system.
  • Compact Size, Space-Saving Installation
    With frame sizes from 55 mm to 220 mm and a 90-degree input configuration, the AT series is perfect for: Machines with limited installation space; Corner-mounted servo motor layouts; Multi-axis robotic configurations. The reducer allows installation on five mounting surfaces, making it flexible for complex automation systems.
  • Easy Installation
    The AT-L1 / AT-R1 right angle servo gearbox is engineered for simplified mounting and alignment: Servo motor installation with international standard adapters; Output shaft precision aligned to housing; Multiple mounting surfaces for versatile machine layouts; Pre-lubricated with fully synthetic grease for maintenance-free operation. Noise levels remain low (≤68–83 dB depending on size), ensuring comfortable operation in high-speed automation environments.

Technical Information

SpecificationUnitStageRatioAT065AT075AT090AT110AT140AT170AT210AT240AT280
Rated Output Torque / T2NNm11254578150360585130021503200
Rated Output Torque / T2NNm11.5254578150360585130021503200
Rated Output Torque / T2NNm12244268150330544122020103050
Rated Output Torque / T2NNm13183354120270450102016502850
Rated Output Torque / T2NNm1413284810022437686014102300
Rated Output Torque / T2NNm151225408519632074012102000
Max Acceleration Torque / T2BNm11~51.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque1.5×Rated Output Torque
Max Acceleration Input Speed / n1srpm11~5750065005500450035003000220020001700
Backlasharcmin11~5≤6≤6≤6≤6≤6≤6≤6≤6≤6
Allowable Radial Force / Fr (Input Shaft d1)N11~570095014502100270038007800960010500
Allowable Radial Force / Fr (Output Shaft d2)N11~590011001700270048006600115001600018000
Allowable Axial Force / Fa (Input Shaft d1)N11~5350425725105013501900390048005250
Allowable Axial Force / Fa (Output Shaft d2)N11~5450550850135024003300575085009000
Service Lifehr11~520000*20000*20000*20000*20000*20000*20000*20000*20000*
Efficiency / η%11~5≥98%≥98%≥98%≥98%≥98%≥98%≥98%≥98%≥98%
Operating Temperature°C11~5-10~90-10~90-10~90-10~90-10~90-10~90-10~90-10~90-10~90
Lubrication–11~5Fully Synthetic GreaseFully Synthetic GreaseFully Synthetic GreaseFully Synthetic GreaseFully Synthetic GreaseFully Synthetic GreaseFully Synthetic GreaseFully Synthetic GreaseFully Synthetic Grease
Noise Level (n1=1500rpm, No load)dB(A)11~5≤68≤70≤74≤76≤77≤78≤80≤82≤83
SpecificationUnitStageRatioAT065AT075AT090AT110AT140AT170AT210AT240AT280
Rotary Inertiakg·cm²110.511.303.167.7023.5758.99195.40369.34799.12
Rotary Inertiakg·cm²11.50.641.162.826.7419.3749.28155.45283.58595.78
Rotary Inertiakg·cm²120.441.112.706.3117.7545.35140.24249.74511.76
Rotary Inertiakg·cm²130.431.092.666.1717.1844.01134.95237.71483.06
Rotary Inertiakg·cm²140.431.092.656.1317.0643.70133.58234.72476.26
Rotary Inertiakg·cm²150.431.092.656.1217.0243.60133.14233.67473.58
Model No.UnitStageRatioAT065AT075AT090AT110AT140AT170AT210AT240AT280
L Serieskg11~52.64.26.811.619.834.866.298.1155.7
L1 Serieskg11~52.64.16.711.519.534.265.198.6153.4
H Serieskg11~52.53.96.411.018.131.660.089.4143.4
C Serieskg11~52.84.26.911.419.633.763.397.9149.1
R1 Serieskg11~52.64.16.711.519.534.265.198.6153.4
LM Serieskg11~53.55.69.015.224.142.481.4122.0190.9
RM Serieskg113.55.69.015.224.142.481.4122.0190.9
4M Serieskg113.55.69.115.424.842.682.5123.5193.3
AT-L1 (R1) SINGLE-SIDE OUTPUT SHAFT STEERING GEARBOX-Dimension

AT-L1 / AT-R1 Series right angle servo gearbox Brochure (PDF)

CAD Models (STEP/IGES)

Technical Datasheet

Installation & Maintenance Manual

Servo Motor Compatibility Chart

Applications

  • Industrial RoboticsJoint rotation modules; End-of-arm tooling (EOAT); Automated gripping stations
  • CNC & Machine Tools: Tool changers; Rotary axis systems; Precision indexing
  • Packaging & Logistics Automation: Conveyor drives; Rotary filling and sealing machinery; Case packing systems
  • Semiconductor & Electronics Manufacturing: SMT pick-and-place machines; Wafer transfer modules; Electronic inspection systems
  • Textile Machinery & Printing Equipment: Servo-driven rollers; High-speed printing axes; Precision fabric feeding systems
  • Material Handling Systems: Lift and rotate actuators; Servo-driven manipulators; Automated palletizing machines

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