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DIY robot concept

Robot arm gripper parts list

A gripper should be light, compliant and matched to the objects the arm can actually lift.

A robot arm gripper is often heavier than expected. A heavy gripper reduces payload at every upstream joint, so keep it compact and light.

Soft fingertips and compliance matter more than raw grip force for small arms. The goal is to hold objects without crushing them or stalling the servo.

Core parts

Micro servo

$8

Actuates simple parallel gripper

Printed gripper linkage

$6

Light jaws and pivot points

Rubber fingertip pads

$3

Grip without high force

Limit switch

$2

Open or closed reference

Force sensor strip

$8

Optional grip force feedback

Design variants

Simple servo claw

One servo, two jaws and rubber pads.

Feedback gripper

Add force sensor and current limits.

Practical safety note

Treat the generated output as a prototype plan, not a certified product. Body-adjacent, high-voltage, optical-energy and mobility builds need qualified review before real-world use.

FAQ

How strong should it be?

Strong enough for the object, but not so strong it overloads the wrist.

Should I use suction?

Suction works for flat, smooth objects but needs a pump.

What is the first upgrade?

Better fingertips and a lighter linkage.

Related robot guides

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