frequently asked questions

What services does MWI offer?

MWI specializes in graphite machining. We offer a wide range of plate stock, precision ground blanks, diameters and custom / machined to print graphite components. In addition, we offer graphite purification, ultrasonic cleaning and specialty coating services.


frequently asked questions

Does MWI have technical staff that can help with applications?

Yes, we employ several engineers that specialize in various applications & industries that can assist you with any project where carbon and/or graphite is required.


frequently asked questions

How long does it take to manufacture graphite?

6 months


frequently asked questions

How is graphite made?

The graphite manufacturing process is very lengthy. It can be synthesized using various processes, the oldest of which involves simply heating the mineral carborundum (silicon carbide) to very high temperatures. Below are the steps in the graphite manufacturing process. To learn more about the graphite manufacturing process, click here.

1. Raw Material Storage
2. Crushing
3. Milling
4. Vibration and Sieving
5. Storage & Pitch Binder = Kneading & Mixing
6. 2nd Stage Milling
7. ISO-Static Pressing
8. Baking
9. Graphitizing
10. Inspection


frequently asked questions

What is MWI’s standard lead time?

MWI’s lead times vary depending on what you order. We have hundreds of items in stock available for same day shipping! If you need machined components, the lead time will depend on the complexity of your part. In addition, our production schedule changes frequently, therefore, we recommend that you contact us for a quote.


frequently asked questions

What information is required to quote custom / machined graphite parts?

Ideally, we’d like to receive a print and a model of the part you’d like machined.


frequently asked questions

What type of dielectric oil does MWI offer for EDM?

We offer DC-100 which is our proprietary blend formulated specifically for EDM. In addition, we carry IONOPLUS-3000 for our customers that prefer a full synthetic fluid.


frequently asked questions

What is MWI’s standard tolerance for sawcut material?

Our standard tolerance for sawcut finish is +.125 / -.000


frequently asked questions

Does MWI have 5-axis machining capabilities?

Yes, we have the capability to produce complex graphite components and electrodes.


frequently asked questions

Does my application require extruded or isotopically pressed graphite?

  • Extruded graphite characteristics include unidirectional grain orientation, large particle size, low density and relative low strength values.
  • Isotropic graphite has no primary grain direction, smaller particle sizes and higher density / strength values.

frequently asked questions

How is EDM grade graphite classified?

Typical users compare graphite particle size and density as the primary indicators for this choice of materials. Larger particle size grades are less expensive and typically used for achieving the highest work piece removal rates. Smaller particle size materials with a higher density are used for the EDM of work pieces that require intricate detail and specific surface finishes.


frequently asked questions

How do I compare one grade of EDM graphite to another?

Asking the distributor for their material specifications is a good place to begin. Often the distributor’s specifications can be compared to that of the manufacturers. We recommend comparative actual test cutting in your EDM. Typically, some simple sharp corner wear and material removal rate tests to varying depths typical of your work will provide valuable information. Use of a CMM, optical comparator or microscope will often give more definitive detail of material wear for comparison. Check out MWI’s EDM graphite product guide here!


frequently asked questions

How does EDM work?

Electrical Discharge Machining (EDM) is a non-traditional machining process that uses electrical sparks to remove material from a conductor. It works by creating an electric spark between an electrode and a conductive workpiece immersed in a dielectric fluid. The spark repeatedly erodes the material, creating a precise cavity or cutting a desired shape. The spark is generated by passing a high-frequency electric current between the electrode and the workpiece. The dielectric fluid isolates the electrical circuit and cools the process, preventing damage to the electrode and the workpiece.


frequently asked questions

Can graphite be cut by wire EDM?

Yes, graphite can be cut by wire EDM (Electrical Discharge Machining). Wire EDM is a type of EDM that uses a thin wire as the electrode to remove material from the workpiece. The wire runs though the workpiece, and electrical discharge sparks occur between the wire and workpiece, cutting away the material. Graphite is a common material used in wire EDM operations due to its high electrical conductivity and ability to withstand high temperature.


frequently asked questions

Where does MWI’s graphite come from?

Our graphite is made in Japan and we are the exclusive distributor for Tokai Carbon in North America. We guarantee material consistency for every grade.


frequently asked questions

Are there weight and size limitations for custom crates?

There are size limitations based on how the crate will be transported. The majority of custom crating is designed to ship via Flatbed or dry van. MWI’s custom crating services are designed to put your mind at ease. We build every crate to specifications so that we know the engineering has been tested and engineered to handle a specific weight. Know that we handle your purchases with care.

 

For any immediate questions – don’t hesitate to call us at 1·800·966·4694.