Servo Motor Mounting Bracket

Servo systems require mechanically stable and geometrically accurate mounting solutions to maintain axis precision, minimize resonance, and handle dynamic load fluctuations. A Servo Motor Mounting Bracket functions as the primary interface between the motor and the machine structure, directly influencing motion accuracy, structural damping, and component longevity. Each bracket is engineered to mitigate critical integration issues frequently encountered in high-speed and multi-axis systems. 

Material

Aluminum 6061-T6, Steel 4140 (hardened), Stainless Steel 304

Dimensional Tolerances

Motor Mounting – ±0.02 mm; Frame Mounting – ±0.05 mm; Overall Geometry – ±0.1 mm

Mounting Holes

Motor Side – M4–M8 (ISO 4762); Frame Side – M6–M12; Position Tolerance – ±0.01 mm

Flatness/Parallelism

Motor Mounting Face – ≤0.02 mm/100 mm; Frame Mounting Face – ≤0.05 mm/100 mm

Perpendicularity

Manufacturing Category – Machining Your Name – sarthak baxi Company Name – greenvolt mobility llp Email – [email protected] Phone – +919825960061

Product Description

A Servo Motor Mounting Bracket is CNC-machined to achieve flatness within 0.01 mm and angularity within 0.02°, ensuring orthogonal and planar alignment between the servo motor shaft and the driven assembly. Such precision is necessary for preventing shaft misalignment, which leads to uneven load distribution, excessive bearing wear, and encoder inaccuracies. The bracket establishes a repeatable mechanical datum, eliminating field rework and ensuring alignment consistency across multiple installations. 

Surface Finish

Mounting Faces – Ra ≤0.8 µm (milled/ground); Non-Critical – Ra ≤1.6 µm

Burr-Free Requirement

Laser-Deburred (ISO 13715 compliant); Edge Radius – 0.2–0.5 mm

Protective Coating

Anodizing (Type III, 25–50 µm), Powder Coating (optional, 60–80 µm), Electroless Nickel (for steel)

Rigidity/Deflection

Max Deflection Under Load – ≤0.01 mm @ 1kN (aluminum), Vibration Damping – Natural frequency >500 Hz

Certification Standards

ISO 9409-1 (Robot Mounting), ISO 9001:2015, RoHS/REACH Compliant

Technical Advantages

Under torque loads and inertial forces, the Servo Motor Mounting Bracket serves as a load transfer medium, routing axial and radial forces into the machine frame. Bracket geometry is developed through FEA to prevent local stress concentrations, particularly around mounting holes and overhung sections. Load paths are optimized by introducing structural reinforcements that maintain dimensional integrity under full acceleration and deceleration phases, critical for preserving servo axis linearity and gear mesh stability. 

The Servo Motor Mounting Bracket must maintain positional fidelity under thermal cycling, especially in enclosures or systems with high heat generation. Material selection is based on thermal compatibility with the servo housing, using 6061-T6 aluminum or normalized low-carbon steels to ensure matched coefficients of thermal expansion. Final machining is performed after thermal stabilization to avoid internal stress-induced warping, preserving tight tolerances over time and across temperature gradients. 

 

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Industry Applications

Multi-Axis CNC Machinery

Supports rigid servo alignment to maintain orthogonal motion across linear axes during high-speed contouring and synchronized tool positioning cycles. 

Robotic Arm Joints

Provides fixed rotational reference planes for servo-driven joints to achieve precise angular movement in articulated robotic manipulators and end-effectors. 

Rotary Indexing Tables

Ensures coaxial servo positioning under high-torque intermittent rotation for applications requiring precise incremental motion and repeatable angular stops. 

Precision Linear Actuators

Maintains parallelism between motor and drive mechanism, minimizing backlash and improving axis repeatability in high-resolution linear motion systems. 

Pick-and-Place Gantry Systems

Holds servo motors in precise alignment for synchronized multi-axis travel in Cartesian systems used for material handling or packaging automation. 

Automated Optical Inspection Platforms

Supports vibration-isolated servo placement to eliminate positional drift and ensure consistent alignment in machine vision and inspection systems. 

 

Vibration Damping and Natural Frequency Tuning

In high-speed servo applications, the Servo Motor Mounting Bracket plays a key role in isolating and attenuating vibrational energy. The bracket’s mass and geometry are tuned using modal analysis to shift its natural frequency outside the servo operating range, typically 2–3 octaves above expected harmonics. This prevents vibration-induced resonance, encoder signal distortion, and mechanical fatigue in lightweight or cantilevered motor setups, thereby increasing system stability and feedback fidelity. 

The Servo Motor Mounting Bracket is designed with integrated dowel pin bores, pilot diameters, or face registers held within ISO H7/h6 fits to ensure accurate positioning during motor installation. This precision eliminates reliance on bolt torquing to achieve alignment, reducing cumulative assembly errors in multi-axis systems. Kinematic constraint principles are applied to limit degrees of freedom and ensure consistent axial and radial positioning under both static and dynamic conditions. 

Servo Motor Mounting Bracket

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure the parallelism of Servo Motor Mounting Brackets for dynamic axis applications?

Frigate machines all bracket surfaces using multi-axis CNC centers with dual-plane referencing to maintain tight geometric tolerances. Parallelism between mounting faces is held within ±0.01 mm across all critical planes. This prevents angular misalignment between the motor shaft and driven axis during motion. Such control is essential in servo-driven stages requiring micron-level travel accuracy. 

 

What design methods does Frigate use to reduce vibration transmission in Servo Motor Mounting Brackets?

Frigate performs modal and harmonic analysis on each bracket to determine its natural frequency. Bracket mass and rib geometry are adjusted to shift resonance outside the servo’s operational range. Material damping properties are also considered based on expected RPM and duty cycle. This reduces feedback-induced oscillations in high-precision servo loops. 

How does Frigate address the risk of thermal distortion in Servo Motor Mounting Brackets used in heated enclosures?

Frigate selects bracket materials with coefficients of thermal expansion closely matched to the servo motor casing. Components are stress-relieved and finish-machined post-treatment to eliminate internal distortions. Mounting hole locations are designed with expansion gaps where required to absorb thermal shift. These steps prevent misalignment in temperature-fluctuating environments. 

 

How are Frigate's Servo Motor Mounting Brackets optimized for belt-driven servo systems?

Frigate designs include adjustable slot paths for fine-tuning belt tension without distorting the motor mounting plane. Brackets are reinforced near tension points to resist deflection under dynamic belt loads. Center distance calibration marks are also machined for repeatable setup. This ensures smooth torque transfer and reduces wear on pulley components. 

 

What tolerance controls does Frigate use for dowel pin holes in Servo Motor Mounting Brackets?

Frigate holds dowel pin holes to ISO H7/h6 fits using in-process probing and post-machining CMM verification. Hole locations are referenced from the primary mounting face, not from unmachined stock. This ensures exact motor placement even after repeated assembly cycles. Precision locating eliminates shift under load or thermal expansion. 

 

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Servo Motor Mounting Bracket

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