In stock

Robotic Arm

4-DOF Acrylic Robotic Arm Kit with MG996R Metal Gear Servos

Four-degree-of-freedom transparent acrylic robotic arm with MG996R metal-gear servos and gripper claw; programmable via Arduino for pick-and-place projects.

₹1,999 + 18% GST

SKU: BOTBIT-ROB-09 · Best for: Learning multi-servo coordination and inverse kinematics basics

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Overview

About 4-DOF Acrylic Robotic Arm Kit with MG996R Metal Gear Servos.

This 4-DOF Robotic Arm Kit is a transparent acrylic manipulator driven by four MG996R metal-gear servos, giving it four independent axes plus a gripper claw. The MG996R servos provide strong torque and durable metal gears, so the arm can reliably pick up, move and place small objects.

With four degrees of freedom the arm can rotate at the base, raise and lower the shoulder and elbow, and open and close the gripper, which is enough to perform genuine pick-and-place tasks. It is fully Arduino-compatible, so learners can control each servo through PWM and script complete motion sequences.

In India this kit is a popular next step up from a single gripper: it is affordable, the clear acrylic looks great on a desk, and the widely documented MG996R servos make it easy to find code, wiring diagrams and troubleshooting help for classroom and hobby projects.

Key features

Why it stands out.

Four degrees of freedom (base rotation, shoulder, elbow and gripper)

Four MG996R metal-gear servos for strong torque and durability

Transparent acrylic structure that is easy to assemble and looks good on a desk

Gripper claw end-effector for real pick-and-place tasks

Fully Arduino-compatible, controlled via standard PWM servo signals

Well-documented platform with abundant example code and wiring guides

Specifications

Selection facts.

Degrees of freedom	4-DOF (base, shoulder, elbow, gripper)
Servos	4x MG996R metal-gear servos
MG996R stall torque	Approx. 9.4 kg-cm at 4.8 V, up to 11 kg-cm at 6 V
MG996R speed	Approx. 0.17 s / 60 degrees
Servo voltage	4.8 V to 6.0 V (typical)
Structure	Laser-cut transparent acrylic
End-effector	Gripper claw
Controller	Arduino compatible (PWM per servo)
Recommended payload	Small light objects (a few tens of grams)

Applications

Where it is used.

Learning multi-servo coordination and inverse kinematics basics
Desktop pick-and-place project builds
STEM and college robotics lab exercises
Joystick or potentiometer-controlled arm projects
Demonstrating PWM servo control with Arduino
Base for adding Bluetooth or app-based control

Buying guide

How to choose.

Buy this 4-DOF arm if you have outgrown a single gripper and want a real, programmable arm for pick-and-place learning without spending a lot. It suits students, robotics clubs and hobbyists who are comfortable wiring several servos.

When choosing, note that four MG996R servos draw significant current, so a dedicated external 5-6V supply is essential; do not power them from the Arduino board. If you need more axes and higher precision, step up to a 6-DOF aluminium or bus-servo arm.

Pair it with an Arduino UNO or a servo-driver board such as the PCA9685, a strong 5-6V power supply (2-3A or more), and potentiometers or a joystick shield for manual control while you learn.

FAQ

Common questions.

How many servos does it use and are they included?

It uses four MG996R metal-gear servos, which are included in the kit as it is sold as a 4-DOF arm with MG996R servos. Always confirm on the listing you buy.

Can I power the servos from the Arduino?

No. Four MG996R servos can draw well over an amp under load. Use a separate 5-6V power supply of at least 2-3A and share the ground with the Arduino.

What library controls it?

The standard Arduino Servo library works for direct PWM control. For smoother multi-servo motion many users add a PCA9685 driver board controlled over I2C with the Adafruit PWM library.

How much can the arm lift?

It is designed for small, light objects. Because leverage reduces effective torque at the tip, keep payloads to a few tens of grams for reliable operation.

Is assembly required?

Yes. You assemble the acrylic frame, mount the four servos and the gripper, then wire them to your controller. Peel the protective film off the acrylic before building.

Is it available in India?

Yes. This is a widely stocked generic 4-DOF arm on Indian robotics retailers, with plenty of local tutorials for the MG996R servos.

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