---
product_id: 505604703
title: "Martin Roller Chain Sprocket, Stainless Steel, Reboreable, Type B Hub, Single Strand, 40 Chain Size, 0.5\" Pitch, 20 Teeth, 0.625\" Bore Dia., 3.457\" OD, 3.5\" Hub Dia., 0.284\" Width"
brand: "martin"
price: "€ 558.51"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/505604703-martin-roller-chain-sprocket-stainless-steel-reboreable-type-b-hub
store_origin: NL
region: Netherlands
---

# 3.457" OD Stainless Steel 20 Teeth Martin Roller Chain Sprocket, Stainless Steel, Reboreable, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 20 Teeth, 0.625" Bore Dia., 3.457" OD, 3.5" Hub Dia., 0.284" Width

**Brand:** martin
**Price:** € 558.51
**Availability:** ✅ In Stock

## Summary

> 🔧 Gear Up for Success!

## Quick Answers

- **What is this?** Martin Roller Chain Sprocket, Stainless Steel, Reboreable, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 20 Teeth, 0.625" Bore Dia., 3.457" OD, 3.5" Hub Dia., 0.284" Width by martin
- **How much does it cost?** € 558.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/505604703-martin-roller-chain-sprocket-stainless-steel-reboreable-type-b-hub)

## Best For

- martin enthusiasts

## Why This Product

- Trusted martin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust Dimensions:** With a 0.625" bore diameter and 3.5" hub diameter, this sprocket is built for heavy-duty applications.
- • **Stable Attachment:** Type B hub guarantees a secure fit, minimizing slippage and maximizing performance.
- • **Customizable Options:** Choose from various teeth counts and diameters to tailor your sprocket to your specific needs.
- • **Versatile Compatibility:** Perfectly engineered for series 40 chain with a 0.5" pitch, ensuring seamless integration.
- • **Corrosion-Resistant Design:** Crafted from premium stainless steel to withstand the test of time and elements.

## Overview

The Martin Roller Chain Sprocket is a high-quality stainless steel component designed for series 40 chains. With a 0.5" pitch and 20 teeth, it offers a robust solution for both driver and driven applications. Its Type B hub ensures a secure attachment, while the customizable bore diameter and varying teeth options provide flexibility for diverse industrial needs.

## Description

The Martin stainless steel, type B sprocket is suitable for use with the series 40 chain with 1/2” pitch. Varying numbers of teeth and outside diameter options offer application flexibility. Made from stainless steel, it has excellent resistance to various types of corrosion, including rust and scaling; and it retains strength at high temperatures. Type B sprockets have a hub extension on one side to provide stability, and allow for the use of a keyway and setscrew to attach the sprocket onto a shaft.  The options for this class of sprocket are: number of teeth from 10 to 60; outside diameter from 1.840” to 9.840”; stock bore size of 1/2” to 3/4”; maximum bore size from 3/4” to 2-3/8”; hub diameter from 1-1/4” to 3-1/2”; length through bore from 7/8” to 1.00”; and a weight from 0.28 lbs to 7.00 lbs. The tooth width is 0.168” nominal. Hubs with a diameter of 1-9/16” or smaller have a recessed groove for chain clearance. The maximum bore size will accommodate the standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at angle to keyseat. All Martin sprockets meet or exceed ANSI standards. A sprocket is a wheel with teeth around the perimeter that meshes with a chain, track, or other perforated or indented material. Unlike gears that mesh with another gear, sprockets mesh with a chain, which then interacts with another sprocket. Gears can be used to transmit power around a corner, based on how they fit together. Sprockets with chains only work in straight lines. Some common benefits of chain-drive systems include minimal slippage, a fixed ratio between rotating shafts, and versatility with many different chain attachments and sprocket material selections. An example of a power transmission system is a standard bicycle, which has a sprocket and a chain to deliver power from the rider’s legs to the wheels making the bike move.Martin Sprocket & Gear manufactures power transmission and conveying products. The company was founded in 1951 and is headquartered in Arlington, TX. Martin provides tools that meet American National Standards Institute (ANSI), National Aerospace Standard (NAS), and Deutsches Institut für Normung (DIN) standards.

## Features

- Stainless steel, to resist corrosion and scaling
- For use with series 40 chain, 1/2” pitch for driver or driven sprocket applications
- Type B sprocket offers a stable and secure attachment to the shaft
- Shaft diameter of 1/2” to 3/4” for a variety of applications
- Varying of numbers of teeth and outside diameter options for flexibility in usage

## Images

![Martin Roller Chain Sprocket, Stainless Steel, Reboreable, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 20 Teeth, 0.625" Bore Dia., 3.457" OD, 3.5" Hub Dia., 0.284" Width - Image 1](https://m.media-amazon.com/images/I/817jupb4NAL.jpg)
![Martin Roller Chain Sprocket, Stainless Steel, Reboreable, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 20 Teeth, 0.625" Bore Dia., 3.457" OD, 3.5" Hub Dia., 0.284" Width - Image 2](https://m.media-amazon.com/images/I/71ZlTcZOfEL.jpg)
![Martin Roller Chain Sprocket, Stainless Steel, Reboreable, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 20 Teeth, 0.625" Bore Dia., 3.457" OD, 3.5" Hub Dia., 0.284" Width - Image 3](https://m.media-amazon.com/images/I/71Ga5tDdWlL.jpg)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-12*