Cryogenic deburring services for machined Delrin® parts remove burrs from components like gears, piston bodies, bobbins, and bushings. Delrin®, an engineered plastic from DuPont, is great for these applications because it combines high strength and low friction with wear resistance. During the machining process, however, raised edges or small protrusions (burrs) may remain attached to the workpiece. If these surface irregularities aren’t removed, part misalignments, premature failure, or operator injury can occur. 

Manufacturers and machinists have a choice of deburring methods, including various manual processes. Hand deburring can be performed in-house, but it’s labor-intensive and can yield inconsistent results. Cryogenic deburring, an automated batch process, is ideal for machined Delrin® parts because it’s fast, consistent and cost-effective. Plus, cryogenic burr removal won’t affect the geometry or surface finish of Delrin® gears, piston bodies, bobbins, or bushings.   

The following Nitrofreeze® case studies demonstrate the benefits of the cryogenic deburring process.

Machined Delrin® Gears

Nitrofreeze® was asked to remove outer diameter (OD) and inner diameter (ID) burrs from machined Delrin® gears. Previously, the customer used deburring brushes and knives instead. Brushes can cause part discoloration and may require different tools for OD and ID operations. Knives can gouge parts and affect surface quality and geometry. With cryogenic deburring, the customer received machined Delrin® gears with burr-free teeth for reliable meshing and high-quality holes for smooth attachments to shafts.  

Machined Delrin® Piston Bodies

Nitrofreeze® was asked to remove burrs from the inner dimensions and hard-to-reach areas of machined Delrin® piston bodies. These cylindrical components had a smooth OD finish, but the part ID had numerous burrs. With cryogenic deburring, the machined Delrin® piston bodies were cooled to a very low temperature so that the burrs became brittle. These machined Delrin® parts were then impacted with non-abrasive polycarbonate media that removed the burrs quickly and cleanly.

Machined Delrin® Bobbins

Machined Delrin® bobbins are flanged cylinders around which lengths of wire, yarn, thread, or film are wound. Nitrofreeze® was asked to remove burrs from the machine cavity and used cryogenic deburring to add value and reduce costs. Unlike hand trimming, which requires workers to deburr parts one at a time, cryogenic deburring is a batch process that provides consistent, high-quality results across tens, hundreds, or even thousands of machined Delrin® parts.   

Machined Delrin® Bushings

Machined Delrin® bushings protect wires and the surfaces that these wires pass through. Nitrofreeze® was asked to remove small, hair-like burrs from the legs of wire bushings with a 3/4” diameter. The machined prongs were a special area of concern. Cryogenic temperatures caused the burrs to become brittle so that they could be cleanly removed. Because cryogenic deburring does not affect surface finish or part geometry, the legs were left intact.

Are Your Machined Delrin® Parts Candidates for Cryogenic Deburring?

What’s the best way to remove burrs from machined Delrin® parts? Contact the experts at Nitrofreeze® to discuss your requirements. No job is too large or too small, and our standard turnaround time is two days after receipt. If your part is a viable candidate for cryogenic deburring, we can perform sampling to demonstrate our burr removal process. The consultation is free of charge, so send us your part drawings, photos, or actual samples of machined Delrin® parts.

To get started, contact Nitrofreeze® at the phone number and email listed below.

(508) 459-7447 x 109 | info@nitrofreeze.com