Finemotion Precision Cycloidal RV Gearboxes & Strain Wave Harmonic Reducers: SHPR-E, SHPR-C, SHPR-H & SHXB Robot Joint Drives

Supply precision cycloidal RV reducers of the SHPR-E series (rated output torque up to 5196 Nm), SHPR-C hollow-shaft cycloidal drives with central cable-routing apertures, SHPR-H heavy-duty high-rigidity gearboxes, SHXB strain wave harmonic reducers with cup and hat flexsplines, SHXB-CSF / SHF crossed-roller integrated cobot modules, complete 6-axis manipulator joint assemblies, and motor mounting flanges manufactured by Zhejiang Finemotion Robot Joint Technology Co., Ltd. (浙江环动机器人关节科技股份有限公司).

Finemotion SHPR-E Precision Cycloidal RV Reducers (Solid Component Type, Rated Torque up to 5196 Nm)

Precision cycloidal RV gearboxes of the SHPR-E series from Zhejiang Finemotion Robot Joint Technology Co., Ltd. provide rigid mechanical reduction drives engineered for high-payload multi-axis robotic articulations and machine tool index tables.

Designed with an integrated heavy-duty double-row angular tapered roller bearing arrangement, SHPR-E units directly support extreme bending moments and overhung radial loads at robot base, shoulder, and elbow axes (axes 1 to 3).

The two-stage planetary-cycloidal transmission achieves exceptional torsional stiffness, quiet meshing, and lost motion below 1 arcminute under demanding reversing duty cycles.

Comprehensive model lineup: standardized sizes including SHPR-6E, SHPR-20E, SHPR-35E, SHPR-40E, SHPR-65E, SHPR-80E, SHPR-110E, SHPR-160E, SHPR-320E, SHPR-320E3, and SHPR-450E spanning rated output torques from 58 Nm up to 5196 Nm
Precision reduction ratios & backlash: standard gear ratios from 57:1 up to 153:1+, lost motion and torsional backlash contained below 1 arcminute (≤ 60 arcsec), with angular transmission error held within 60 arcseconds
Heavy-duty overload margins: permissible peak acceleration/deceleration torque up to 1029–10,500 Nm, emergency momentary peak torque tolerance up to 2058–21,000 Nm, and design B10 bearing lifespan exceeding 20,000 operating hours
Integrated structural bearings: preloaded high-capacity tapered roller bearings capable of directly absorbing external tilting moments up to 12,000 Nm without requiring auxiliary external support bearings

Finemotion SHPR-C Hollow-Shaft Precision Cycloidal Reducers (Center Bore for Internal Cable Routing)

The SHPR-C hollow-shaft precision cycloidal gearbox family by Finemotion is purpose-designed for robotic manipulators and automated workcells requiring internal pass-through of electrical power lines, sensor bus cables, pneumatic supply hoses, and fiber-optic cables.

The wide-diameter center aperture completely eliminates external cable dangling and snag hazards across continuous rotational articulations, protecting wiring harnesses from cyclic fatigue and allowing streamlined machine profiles in space-constrained industrial installations.

Large-diameter central bore: clear inner aperture spanning 24 mm to 135 mm designed for internal dressing of motor power harnesses, industrial Ethernet fieldbus cables, and pneumatic lines
Balanced tubular structural design: symmetric multi-eccentric planetary architecture ensuring rigid torsional transmission matching solid-shaft SHPR-E performance standards
Dynamic mechanical performance: continuous rated output torque ranging from 160 Nm to 3200 Nm with gear ratios between 80:1 and 160:1 and precision backlash held under 1 arcminute
Specialized robotics deployment: ideal for hollow-wrist arc welding robots, laser processing heads, dual-arm collaborative robots, and semiconductor cleanroom wafer positioners

Finemotion SHPR-H Heavy-Duty High-Rigidity Cycloidal Gearboxes (Payloads up to 1000 kg, Reinforced Bearings)

Engineered for the most demanding robotic automation environments, the SHPR-H series from Finemotion provides extreme load-bearing capacity for heavy-payload industrial robots, automated stamping press transfers, automotive body-in-white spot welding stations, and foundry manipulators handling up to

1000 kg payloads. Featuring case-hardened alloy gearing, reinforced roller arrays, and enlarged main support bearing assemblies, SHPR-H reducers resist severe shock impacts, high tipping moments, and emergency stop events without structural deformation.

Ultra-high torque output: continuous rated torque up to 7000 Nm, acceleration peak capacity reaching 15,000 Nm, and emergency shock survival ratings up to 25,000 Nm
Deep case-hardened tooth profile: proprietary heat treatment and carburizing process on cycloidal profile discs delivering superior tooth root bending strength and surface pitting resistance
Superior torsional rigidity: torsional stiffness ratings up to 150–220 Nm/arcmin, suppressing arm settling oscillation and resonant vibration on long-reach articulated booms
Heavy automation applications: designed for automotive body spot-welding articulated robots, forge-tending transfer gantries, heavy palletizers, and aerospace structural positioners

Finemotion SHXB / SHPR-XB Precision Strain Wave (Harmonic) Reducers (Zero Backlash, Cup & Hat Flexspline)

Precision strain wave harmonic gear reducers of the SHXB (SHPR-XB) family by Finemotion deliver compact zero-backlash drive solutions utilizing thin-walled flexible cup-type and hat-type flexsplines.

Driven by an elliptical wave generator incorporating high-precision thin-section ball bearings, Finemotion harmonic reducers engage over 30% of their total tooth count simultaneously.

This distributed meshing architecture guarantees virtually zero lost motion (backlash ≤ 10–20 arcsec), ultra-smooth angular velocity transmission, and superior power-to-weight ratios for robotic wrists and precision positioning mechanisms.

Standardized framework sizes: industrial frames including SHXB-14, SHXB-17, SHXB-20, SHXB-25, and SHXB-32 with reduction ratios of 50:1, 80:1, 100:1, 120:1, and 160:1
True zero-backlash motion: lost motion strictly maintained under 10–20 arcseconds, providing positional repeatability within ±5–10 arcseconds for sub-millimeter trajectory tracking
Fatigue-resistant flexspline metallurgy: manufactured from vacuum-melted high-purity alloy steel subjected to multi-stage heat treatment, ensuring high fatigue endurance under continuous flexing
Wrist articulation optimization: lightweight, ultra-short axial length tailored for axes 4, 5, and 6 of collaborative arms, SCARA pick-and-place robots, and compact gimbals

Finemotion SHXB-CSF / SHF Integrated Harmonic Modules (Crossed Roller Bearings, Cobot Joint Solutions)

Integrated strain wave drive modules in the SHXB-CSF and SHXB-SHF configurations integrate Finemotion's zero-backlash harmonic gearing with a high-rigidity crossed roller output bearing into a pre-lubricated, sealed mechanical sub-assembly.

The internal crossed roller bearing directly supports heavy overturning moments, radial forces, and axial thrust loads transmitted from end-effectors, dispensing with external housing bearings.

This compact architecture is widely deployed in collaborative robot (cobot) joints, minimally invasive surgical robots, powered human exoskeletons, and automated guided vehicle (AGV) articulating arms handling 3 to 20 kg payloads.

Integrated crossed roller bearing: precision preloaded crossed roller bearing offering high rotational runout accuracy and tilting rigidity up to 35–80 Nm/arcmin
Fully sealed component unit: sealed factory assembly pre-filled with high-grade synthetic grease, eliminating on-site gear alignment and sealing contamination risks
Cobot-centric low-profile format: ultra-flat pancake profile maximizing payload-to-weight ratio for human-safe lightweight articulated robotic joints
Specialized deployment areas: collaborative manipulator joints, surgical robotic arms, automated optical inspection gimbals, and high-precision laboratory automation

Finemotion Integrated Articulated Robot Joint Modules (Complete Axes 1 to 6 Kinematic Coverage)

Finemotion supplies matched joint actuation assemblies and precision gear modules engineered for the complete kinematic chains of 6-axis articulated industrial arms, high-speed SCARA assembly robots, and parallel Delta packaging mechanisms.

By pairing high-torque cycloidal SHPR-E/C gearboxes on primary payload-bearing axes (1, 2, and 3) with compact SHXB strain wave reducers on articulating wrist axes (4, 5, and 6), robot builders achieve an optimized balance of dynamic inertia, path trajectory fidelity, and sub-0.02 mm

tool-center-point (TCP) repeatability.

Complete 6-axis powertrain integration: heavy cycloidal SHPR units dedicated to base yaw, shoulder pitch, and elbow pitch, paired with harmonic SHXB units on wrist pitch, roll, and yaw
Dynamic motion stability: structural stiffness engineered to withstand operational angular accelerations up to 360°/s² while suppressing end-effector overshoot and settling lag
Multi-architecture adaptability: configured for vertical multi-joint articulated robots, 4-axis selective-compliance SCARA arms, and high-frequency parallel Delta robots
Laser-verified factory quality control: 100% production run testing on dynamic dyno testbenches and laser interferometer tracking for backlash and frictional torque profiling

Finemotion Precision Rotary & Indexing Drives for CNC Machine Tools & Robotic Positioners

High-rigidity cycloidal reducers and zero-backlash harmonic drives from Finemotion serve as precision direct rotary mechanisms for 4th and 5th rotary/tilting axes in multi-axis CNC machining centers, horizontal indexing tables, and automated tool changers.

With internal preloaded bearing assemblies absorbing high cutting forces and overturning moments, Finemotion drives prevent chatter and tool vibrations during heavy-duty milling of hardened tool steels, titanium, and aerospace alloys, delivering superior surface finishes and tight dimensional

tolerances.

Multi-axis CNC rotary tables: direct integration of SHPR-E/C gearboxes inside A/B/C tilting rotary tables for simultaneous 5-axis contour milling of turbine impellers and molds
Robotic welding servo positioners: powering 1-axis and 2-axis positioner tables for synchronous coordinated part manipulation alongside robotic arc welding cells
Rapid tool magazines & turrets: fast index positioning and high holding torque for CNC lathe tool turrets and automatic tool changers (ATC) with indexing times under 0.5–1.0 s
Vibration dampening characteristics: multi-tooth conjugate engagement absorbs high-frequency cutting shocks, eliminating surface waviness and extending cutter tool life

Finemotion Servo Motor Adapter Flanges, Input Pinions & Genuine Reducer Lubricants

To guarantee reliable integration with all standard industrial servo drives, Finemotion supplies engineered motor adapter plates, precision input pinions, high-temperature fluororubber (FKM) seals, and factory-certified synthetic gear greases.

Finemotion adapter kits are manufactured with micron-level concentricity and perpendicularity tolerances, eliminating motor shaft runout, reducing input bearing stress, and ensuring the full rated design lifespan under continuous heavy-duty reversing service.

Servo motor adapter kits: precision-machined adapter plates engineered for standard industrial servo motors (motor frames 40, 60, 80, 100, 130, and 180 mm)
Precision input drive pinions: case-hardened spur and helical motor input pinions available with keyway bores and zero-backlash conical clamping sleeve connections
Long-life rotary lip seals: dual-lip FKM rotary seals rated for -20°C to +120°C operating temperatures providing hermetic oil retention and abrasive dust exclusion
Certified extreme-pressure grease: genuine synthetic greases enriched with extreme-pressure (EP) additives developed specifically for cycloidal and strain wave tooth friction contacts

Design Principles and Kinematics of Finemotion Gearboxes: Cycloidal RV and Harmonic Drives

Headquartered in Yuhuan, Zhejiang Province, Zhejiang Finemotion Robot Joint Technology Co., Ltd. (浙江环动机器人关节科技股份有限公司) specializes in the engineering and volume manufacturing of high-precision reduction gearboxes for industrial robotics and high-end automation equipment.

Finemotion product lines concentrate on two core mechanical transmission architectures: solid and hollow-shaft cycloidal planetary gearboxes of the RV class (SHPR-E, SHPR-C, and heavy-duty SHPR-H series) and high-precision strain wave harmonic gear reducers (SHXB series).

The kinematic mechanism of the SHPR cycloidal series features a compact two-stage reduction layout. The primary cylindrical or helical spur gear stage divides motor torque across multiple eccentric crankshafts configured with symmetric 180-degree angular phase offsets.

These eccentric shafts actuate twin cycloidal gear discs that roll smoothly along needle pin rollers enclosed within the stationary outer ring gear housing.

By distributing radial and tangential contact forces across multiple conjugate teeth simultaneously, the design withstands violent shock overloads without tooth shear or permanent backlash drift.

Finemotion SHXB strain wave harmonic reducers transmit rotary motion through the continuous elastic deformation of a thin-walled alloy cup or hat flexspline driven by an elliptical ball-bearing wave generator.

With over 30% of the gear teeth engaged simultaneously, the transmission delivers virtually zero backlash (lost motion contained below 10–20 arcseconds), high torsional rigidity, and ultra-compact axial lengths ideal for robotic wrist articulations.

Engineering Selection and Dynamic Sizing: Torque, Backlash, Gear Ratio, and Torsional Stiffness

Selecting the correct Finemotion robotic joint reducer begins with kinematic load modeling across the planned motion trajectory.

Core engineering parameters include the equivalent moment of inertia of the articulated arm and end-effector payload, maximum angular acceleration rates, nominal operational torque, and duty cycle thermal loading.

The rated continuous output torque of the selected reducer size must exceed the calculated root-mean-square (RMS) operating torque with a safety margin of at least 1.3 to 1.5.

Peak acceleration and deceleration torques must remain comfortably within the reducer allowable peak ratings, while the emergency stop torque specification must guarantee structural tooth survival in unforeseen crash situations at full axis speed.

Angular backlash and torsional stiffness are vital selection criteria determining tool center point repeatability and dynamic settling time.

Finemotion SHPR cycloidal reducers guarantee lost motion below 1 arcminute (≤ 60 arcseconds), preventing error accumulation down multi-link articulated serial robots and ensuring sub-0.02 mm positioning fidelity.

Robotic Axis Integration: Manipulator Joints, Hollow Shaft Routing, and Cobot Modules

Modern multi-axis industrial robots utilize differentiated reducer families across distinct joint kinematics.

Heavy primary payload-bearing joints (axis 1 base rotation, axis 2 shoulder elevation, and axis 3 elbow flexion) experience severe overturning tilting moments and rely on SHPR-E cycloidal gearboxes with preloaded high-capacity tapered roller bearings.

For laser cutting and arc welding articulated arms, hollow-shaft SHPR-C series reducers provide a clean pass-through center bore from 24 mm to 135 mm.

High-voltage servo cables, sensor fieldbus networks, and pneumatic hoses pass directly through the axis core, preventing external cable entanglement and eliminating umbilical harness wear during continuous rotation.

Wrist joints (axes 4, 5, and 6) and lightweight collaborative robot (cobot) joints integrate SHXB-CSF and SHXB-SHF harmonic drive modules equipped with preloaded crossed roller bearings.

These modules deliver an ultra-flat pancake profile, minimal mass, and zero backlash for safe, sensitive human-robot collaborative automation.

Maintenance Schedules, Lubricant Replenishment, and Motor Mounting Guidelines

Operational reliability and precision longevity of Finemotion drive units depend on proper servo motor coupling and lubrication discipline.

During motor assembly, the adapter flange and input pinion must be aligned using precision pilot diameters with radial and axial runout verified within 0.01 to 0.015 mm.

Finemotion gearboxes are pre-filled with high-performance synthetic extreme-pressure (EP) greases specifically formulated for high Hertzian contact stresses in cycloidal rolling-sliding and flexspline tooth meshing.

Mixing certified factory grease with conventional mineral or generic lithium greases is strictly prohibited.

Routine maintenance inspection and lubricant replenishment are scheduled every 10,000 operating hours or after 3 years of industrial service.

During servicing, technicians inspect the condition of dual-lip fluororubber (FKM) rotary shaft seals to prevent environmental contamination and grease leakage.

Global B2B Supply of Finemotion Precision Reducers and Drive Units by Equipguo

Equipguo provides comprehensive industrial export supply of genuine Finemotion precision cycloidal RV reducers, strain wave harmonic drives, and integrated joint modules for robotic manufacturers and automation integrators worldwide.

Our mechanical engineers assist engineering teams with CAD cross-referencing, reduction ratio optimization, and motor adapter plate customization to match standard industrial servomotors.

Export shipments are dispatched with complete technical documentation, factory quality inspection sheets, and direct express logistics to manufacturing facilities internationally.

Manufacturing lead times, engineering adaptation tolerances, and export quotations for Finemotion (Zhejiang Finemotion Robot Joint Technology Co., Ltd.) cycloidal SHPR reducers, harmonic SHXB gearboxes, and cobot joint assemblies are determined on an individual project basis; public retail price

lists are not published. We operate as an independent international industrial equipment supplier and are not an exclusive distributor of the manufacturer.