Sintering

The powder blend you specify is placed in a mold of the appropriate size and subjected to high pressure to create a "green" pre-form. These pre-forms are then "sintered" in our ovens which is a process that utilizes atomic diffusion to solidify the particles into a solid piece. These solid pieces are called “bushings” or “billets”. Sintering is the preferred technique for shaping materials with extremely high melting points. Our oven cycles also include a stress relieving cycle to eliminate geometry distortion during the machining process.

Tooling

We currently offer over 500 sizes between 1.0” solid rod and 27.5” OD (outer diameter) cylinders with a minimum of 1/2" wall thickness, from 3" to 9" in length. Most products can be created in 1/4" increments; however some 1/8" increments are available below 5 1/4" in diameter. The largest diameter products may have only 1/2" increments. All sizing is in inches.

If we do not carry the size you need in that range we may acquire the tooling necessary at our discretion. If you require sizes below 1.5” OD we suggest you consider manufacturers who use the injection or extrusion method instead of compression molding for safety reasons.

Machining

We select mold sizes that are slightly larger than your needed finish size so that you have enough material to trim and machine the parts you need to your specification with as little waste as possible. PTFE can easily be machined using anything from woodworking equipment to any type of CNC machining equipment. The material can be cut, bored, milled and turned. Additionally we offer board mounting services with a particle board disk for mounting during machining at your request.