Machinable plastics
Nylon Machining
CDS machines nylon parts for loaded wear applications. Bushings, rollers and drive components can benefit from nylon’s toughness, with moisture, load duration and the exact grade affecting fit and service.
Nylon is a polyamide family. PA6, PA66, cast stock and modified grades can behave differently in the same component.
Nylon for loaded wear components
Bushings, rollers, idler wheels and sprockets combine load with movement in different ways. Nylon’s toughness, sliding behavior and abrasion resistance make it a candidate, but the grade, moisture state and contact determine how it behaves.
- Sliding or rotating contact
- Speed, contact area, counterface, lubrication and debris affect friction, wear and heat. A bearing-grade result cannot rate every nylon interface.
- Continuous load
- A stationary roller or compressed pad can keep deforming under sustained stress. Load duration, support and temperature matter alongside initial strength.
- Impact or a jam
- A strike, installation force or repeated jam can load notches and thin sections differently. Conditioning and low-temperature exposure can change toughness.
Moisture can change the fit after machining
Nylon absorbs moisture. Dimensions and mechanical or electrical properties can change between dry machining, humid storage, assembly, washdown and immersion. That movement matters at a bore, press fit, running clearance, gear mesh or locating feature.
One nylon part, four relevant conditions
- MachiningMoisture and stock condition accompany the starting geometry.
- InspectionDimensions are accepted in a stated material condition.
- AssemblyThe conditioned part must achieve the required fit.
- ServiceHumidity, water and heat can change dimensions again.
Which condition controls the drawing?
A dimension accepted dry may not describe the same fit after conditioning. The drawing’s moisture and temperature conditions help connect inspection to assembly and service.
Thin walls, closely located bores, press fits and large material removal can also respond to machining heat, released stress and assembly load. There is no universal nylon tolerance or conditioning procedure.
When moisture movement could close a clearance or change assembly force, compare Acetal and Nylon.
PA6, PA66 and cast nylon are different specifications
- PA6 and PA66
- These are distinct polyamide types. PA6 may be cast or extruded; PA66 is commonly encountered as an extruded engineering shape. The polymer name alone does not specify the complete grade.
- Cast or extruded stock
- The terms describe stock-shape production. Extrusion commonly serves smaller shapes; casting can support larger shapes with lower internal stress. Polymer, grade, section and conditioning still control the comparison.
- Modified grades
- Fillers, reinforcement, heat stabilizers and lubricants can change stiffness, friction, wear, impact and machining behavior.
- Nylatron callouts
- Nylatron is a registered nylon brand with multiple formulations. Nylatron GS, for example, is a molybdenum-disulfide-filled PA66. The full branded grade and its supply need confirmation.
Cast nylon machining and nylon 66 machining therefore start with different material definitions. The stock form, grade and finished geometry belong together.
Heat, water and cleaning
Continuous temperature, short excursions, frictional heat and cleaning temperature impose different demands. Heat under load can increase creep; cold impact can govern a notched part.
Nylon families generally resist oils, fuels and some alcohols. Strong acids or alkalis, hot water, steam, oxidizing cleaners and mixed exposures need exact-grade checks. Swelling or softening can occur before visible surface attack.
Documents for the actual use
Food-contact, detectable, electrical and flame requirements need documentation for the exact grade and use. A generic nylon callout does not establish those properties or approvals.
Explore other machinable plastics when moisture, temperature or chemistry points to another material.
Your Nylon machining quote
Share your drawing and revision, or the available records for an existing part. CDS quotes machining against your specified material and finished-part requirements.
- Part requirements: Bores, teeth, profiles and other features, with customer-specified dimensions, tolerances and the moisture and temperature conditions required for inspection.
- Specified material: PA6 or PA66, cast or extruded stock where controlled, and the full modified or Nylatron grade if required.
- Order and records: Quantity or useful quantity tiers, requested date and required material, inspection or traceability documents. Identify any specified tests for confirmation with the quote.