How hard is Delrin?
It's true that Delrin is an easy material to work with in terms of machining. It is a very stable material, which makes precise, tight tolerances easier to achieve for this thermoplastic. While machining, keep in mind that Delrin is sensitive to heat at or above 250 °F (121°C).
How brittle is Delrin?
Delrin does not use plasticizing for toughness: and so does not become brittle at low temperatures.
Does Delrin break easily?
As a machined item, Delrin is particularly easy to work with. With PTFE, we need to consider the softness of the material and also its sensitivity to temperatures, with nylons and UHMWPE, we need to be careful of the part melting during machining, with PEEK, the tool itself can break, if we do not control the RPM.
Delrin® homopolymer is used to make screws, hex nuts, threaded rod, set screws, as well as many other fasteners and custom parts.
Delrin is a 3D printing material with excellent resistance to wear, is an ideal material for such parts and functional prototypes. Another property that a 3D printing material should have for making parts and functional prototypes like gears and bearings is the material's coefficient of friction.
Although it's more expensive than other thermoplastics such as ABS, Acetal (also commonly referred to by it's DuPont trademark, Delrin) is a fantastic engineering plastic that performs well in environments where low friction and high strength are required.
Well-Known Member. delrin is self lubricating but if you want to grease it go ahead. delrin is one of the most chemically resistant plastics there is. no grease will hurt it.
Re: polishing Delrin
Just go to the hardware store or craft shop and get a stick of jeweler's rouge. Moisten a stiff cloth, rub a good amount of rouge on it, and hold it to the spinning part. BE SURE TO project your lathe ways and the chuck. If the rouge gets on them it can hasten their wear.
Delrin plastic works as an excellent replacement for metal because of its high-tensile strength, low-friction and high-wear resistance, creep and warp resistance, and overall durability and toughness.
Yes! Delrin Acetal Copolymer is composed of 10-25% of PTFE fluorocarbons dispersed in Delrin Resin. This material possesses strength, dimension, and stability. Making this material one of the most slippery solid metals.
Despite having a relatively high cost when compared to unfilled Acetal, it is widely used and specified.
Delrin is actually very hard plastic. It is much stiffer than 95a polyurethane with much less NVH transferred vs aluminum. This material is excellent for track-oriented or dedicated track vehicles as it does still offer some vibration absorption over solid aluminum while still being extremely rigid.
As a bushing material, delrin boasts many important properties including high tensile strength, high impact strength, high elongation, high chemical resistance, low moisture absorption, and more. In addition to low deflection, delrin's best feature when compared with polyurethane is self-lubrication.
With the Delrin bushings it won't matter if you grease them or not. Because they don't last any longer then the OEM.
A sharp twist drill, properly aligned, should work fine, assuming it's properly ground. If you have concern about actual size, consider double drilling, but ensure that you are properly aligned if that's your choice. The normal tap drill would be 5/16. The thread will be 3/8-16 UNC-2A.
Delrin (DuPont's brand of acetal) and ABS are both plastics. Delrin is referred to as an "engineering" plastic because it is stronger and more resistant to distortion under load. ABS is "commodity" plastic because it is cheaper and easier to mold, however because of it's flexibility, is relatively hard to break.
Delrin® acetal homopolymer (Polyoxymethylene POM) is the ideal material in parts designed to replace metal. It combines low-friction and high-wear resistance with the high strength and stiffness such applications require. It provides a wide operating temperature range (-40 °C to 120 °C) and good colorability.
Polyoxymethylene (POM) injection molding material, often referred to as Delrin® or acetal is an engineered thermoplastic material that is used to manufacture parts that require increased stiffness, low friction versatility and greater dimensional stability.
While HDPE Sheet and Acetal Sheet look similar, they perform quite a bit differently. Acetal is commonly known as: Delrin Homopolymer Acetal, Tecaform AH,Ensital, Unital, Pomalux, Ultraform and many more. HDPE is also known as: Ultraethylux, Densetec, Polystone G, Fortiflex, Versadur, Hostalen, and many more.
Delrin® Acetal Sheet Homopolymer Color, Delrin®150, Red, (0.031 in x 24 in x 48 in)
Clamp in a vice or bend in a tube bender and heat it up with a heat gun. I hold the bend and run cold water over it to help it cool quicker so it holds it's new shape. 1/4" is a little small though and you may find it too flexy with a bend in it.
Acetone appears to soften Delrin as well.
Recyclable. As a thermoplastic material, Delrin® can be recycled using industry standard recovery techniques.
Wet-sand the surface with a belt or disc sander. Start with the coarsest grit paper and work your way to finer and finer grit paper. This results in a surface largely without any scratches and should be quite smooth. Rinse the Delrin surface with an appropriate solvent to remove any residue.
Rinse the Delrin surface with an appropriate solvent to remove any residue. Buff the Delrin surface, once dry, with an electric buffer. Do not put too much pressure on the Delrin object during this stage. Wipe the surface with a very fine cloth to remove any smudges or debris.
When compared to acetal copolymers, Delrin® homopolymer combines higher fatigue and creep resistance with overall higher toughness and higher tensile strength and stiffness, allowing for thinner and lighter part design, and the potential for reduced part production cost.
As far as durability, Delrin is WAY tougher than acrylic.
General purpose grades of Delrin® are available in several basic melt flow series: 100, 500, 900, and 1700. These differ primarily in melt viscosity with 100 being the most viscous and 1700 the most fluid. Delrin® 100, 500 and 900 are known around the world for their outstanding mechanical properties.
Delrin® possesses high tensile strength, creep resistance and toughness. It also exhibits low moisture absorption. It is chemically resistant to hydrocarbons, solvents and neutral chemicals. These properties along with its fatigue endurance make Delrin® ideal for many industrial applications.
The resulting product is one that possesses the strength, toughness, and dimensional stability of Acetal with the added properties of PTFE, which is one of the world's most slippery solid materials. In fact, PTFE, commonly known as Teflon®, is used as the non-stick material on cookware.
Dupont Delrin® is a premium Homopolymer Acetal or polyoxymethylene (POM-H) and it is a semi-crystalline, non-amorphous type of thermoplastic.
Delrin® SC is the industry-leading acetal for medical devices that require the highest mechanical properties. For the highest rigidity, best spring-like forces, low creep, and USP Class VI and ISO 109993 compliance, Delrin® acetal is the superior medical polymer material.
Acetal (POM) is considered a high performance plastic. This particular plastic has excellent chemical resistance, solvent resistance, wear properties and is self-lubricating.