This is a big ring sintered ferrite magnets with hole, also can be referred to as 180mm magnetic ring, the material is sintered ferrite, the specific size is 180mm outer diameter, 85mm inner hole, 20mm thickness. The tolerance is ±0.1mm. 

Are there other size of inner hole 180mm sintered ferrite rings?

Of course, we are the manufacturer, and you can customize magnets according to your need about specifications, surface coating color, magnetic charging direction, working temperature, etc. 

In terms of size, I need to explain that the tolerance of ferrite is ± 0.1mm.

Exist ferrite samples specification -180mm outer hole

Ø180X75X22

Ø180X80X20

Ø180X85X20

Ø180X87X22

Ø180X89X20

Ø180X90X20

Ø180X90X25

Ø180X95X20

Ø180X55X15

Ø180X55X20

Ø180X55X25

Ø180X75X15

Ø180X75X20

Ø180X95X22

Ø180X95X24

Ø180X95X25

The advantages of sintered ferrite:

Compare with sintered Ndfeb , the advantage of sintered ferrite including:

1.Low cost, low price. Raw materials cost very cheap.

2.Good temperature stability. It can be used at temperatures less than 200 degrees Celsius.

3.Corrosion resistance

The way of 180mm outer diameter ring magnet:

It can be widely used in all kinds of automobile motors, home appliances, speakers, sensors, smart home, goods packaging, electronic hardware products, toys and water pumps and other places

Dongguan Courage Magnetoelectric Technology Co., Ltd. is a Chinese magnet manufacturer specializing in the production of strong neodymium magnets, ceramic ferrite magnets, motor multipole magnets. We have cooperated with many customers for many years, mainly for the following reasons:

1, We are good at processing high performance, high precision, high difficulty magnet, especially in the field of DC motor magnet, have strong professional knowledge, experience.

2, We have a professional production, sales, design team, based on the industry for more than 14 years.

3, We have advanced magnet production and testing equipment, according to customer requirements to design, production of special requirements of magnet products,

4. The company's products have passed SGS, ROHS, REACH certification and a complete ISO9001 quality management system, specializing in providing high-quality permanent magnet products to customers in various countries.

5. Experience in serving Western, Asian and North American companies, we also have close ties with other regions, fedex or DHL can deliver,

6, Even if our customers do not know much about magnets, we will help and provide accurate product solutions.

You may be interested;

Courage Magnet Manufacturer Magnet Testing Certificate & Report

You may be interested in these magnet problems (Q&A) ;

1、Could you give me some magnet samples?

Yes, we have magnets in stock to help you get samples as soon as possible.

2、How long will it take me to get a reply to your email or inquiry?

We will contact you as soon as possible within 12 hours.

3、Why don't the magnets on your company website say the price?

Magnets belong to functional products, most customers have different requirements for magnets, such as material, shape, performance, tolerance, temperature resistance, purchase quantity, etc., we can customize processing according to your requirements, so we need to clarify your specific needs and then give you a quote.

4、Do you guarantee the quality of your magnet products?

We have ISO,SGS and REACH certifications. If necessary, we can send you relevant materials.

5、May I come and visit your magnet factory?

Sure. We'll show you around our factory if you want.

6、What is your delivery time?

See if there is spot stock, if there is immediately can be arranged to send, if there is no need to process in 10-30 days or so, depending on what kind of magnet.

More Questions and Answers about Magnets: https://www.couragemagnet.com/magnet-faqs/

Courage magnet manufacturer magnet packaging and delivery method:

The magnets we make are mainly delivered to you by sea or air. The packaging is generally neutral packaging, shielded packaging, vacuum packaging, pallets, etc., which can be packed according to your requirements.

Explanation:

a: Express (TNT, DHL, FedEx, UPS, etc.), air freight, sea freight.

b: The weight is less than 40Kgs. We suggest sending it to you by shield box.

c: It weighs between 40 kg and 100 kg. It can be expressed or shipped by air.

d: The weight is over 100 kg. We suggest sea transportation.