teamargos.org

import half_link from ‘./half_link.png’ import chain_tension from ‘./chain_tension.png’ import ChainCalculator from ‘@site/src/components/ChainCalculator’

Chain & Sprocket

Overview

What they are:
- Sprockets are toothed wheels, and a chain is made of connected metal links that fit onto those teeth.
What they do:
- When a sprocket turns, its teeth grab the chain and pull it, which makes another sprocket turn. This is a strong way to transfer power.
Pros:
- Very strong and tough for heavy loads, no slipping (motion is precise), can work over moderate distances. Can make chains almost any size.
Cons:
- Can be noisy, needs oiling and cleaning, not as smooth as belts, chains can stretch over time, heavy.

Argos Standard

Chain
Argos uses #25 Roller Chain

A common ANSI standard chain, identified by its 1/4-inch pitch
Suitable for light-duty applications

Standard Sprocket
Standard Sprocket Size: 16 Teeth 1/2” hex

How to Calculate Chain Center Distance

External Calculator Reference

Center Distance Calculator

If Sprockets are the Same Size

#25 chain - Center distance should be a multiple of 0.25 in
#35 chain - Center distance should be a multiple of 0.25 in

How to Tension Chain

Adding Center Distance

For #25 chain add 0.018 inch

This is a set length no matter how long the chain is
Reference: FIRST Design: Effective mechanical mechanisms for FIRST - go to 19:40 for chain info by FRCTeam1718

Chain Turn Buckles

If the chain does not have to go around a full loop, you can use a turn buckle
Provides adjustable tensioning mechanism

<img src={chain_tension} width=”300”/>

Half Links

Special link that is half the standard distance
Used for fine-tuning chain length when full links don’t provide the exact center distance needed

<img src={half_link} width=”300”/>