Discount Nylon Tubes Manufacturers & Products

Extruded nylon is produced via continuous screw-extrusion of melted polyamide granules, making it ideal for thin-walled, flexible, or smaller-diameter applications (OD up to 100mm) such as pneumatic brake and fuel delivery lines. Cast MC Nylon (Monomer Cast) is manufactured through an activated anionic chemical reaction where liquid caprolactam monomer is poured directly into rotating or vertical preheated metal moulds at atmospheric pressure. This method produces virtually limitless wall thicknesses and diameters (up to 1,000 mm+ OD), yielding higher crystalline content, greater surface hardness, better wear resistance, and substantially reduced internal tensile stress.

Burst pressure is derived using Barlow's Formula: P = (2 * T * S) / D, where P represents the burst pressure (bar/MPa), T is the minimum wall thickness, D is the tube outside diameter, and S corresponds to the tensile hoop stress of the specified resin at operating temperature. For prolonged fluidic service, standard engineering practice applies an ASME/ISO safety factor of 3:1 or 4:1. Furthermore, since polyamide softens with increasing temperature, a thermal derating factor must be applied: at 60°C, working pressure ratings typically drop to 55-60% of their ambient 23°C values.

Polyamides are hygroscopic: atmospheric moisture breaks secondary hydrogen bonds within the amorphous zones of the polymer chain. Under typical industrial conditions (50% RH, 23°C), cast nylon absorbs approximately 2.5% to 3.0% moisture by weight, expanding the dimensional envelope by roughly 0.5% to 0.7%. In applications requiring tight clearance fits (such as heavy rotary sleeve bushings), machine turners should allow for an additional 0.003 to 0.005 inches per inch of inside diameter bore, or opt for moisture-resistant polymers like Acetal (POM-C) or long-chain PA12.

Internally lubricated (oil-filled) MC nylon delivers significant operational advantages over phosphor bronze: it is roughly 85% lighter, dramatically lowering startup torque and rotary inertia; its dynamic friction coefficient (0.10–0.12) is achievable without continuous grease lubrication; and its inherent viscoelasticity absorbs impact energy rather than denting or galling mating metal shafts. In abrasive environments featuring coal dust, sand, or cement powder, hard particles gently embed into the nylon substrate rather than gouging the mating drive pin.

Every container leaves the facility backed by an ISO 9001-certified factory inspection report. Deliverables include an EN 10204 Type 3.1 Material Test Certificate documenting density, Shore D hardness, tensile modulus, and heat deflection metrics. For critical cylindrical hollow bars, full-body ultrasonic non-destructive testing (NDT) reports verify the complete absence of internal shrinkage cavities or microporosity. Compliance documentation for EU RoHS, REACH, and FDA (for natural white formulations) is also provided.

Given polyamide's lower thermal conductivity and greater elastic flexibility compared to metals, machining setups must prioritize sharp cutting tools with generous positive rake angles (15° to 30°) and polished flutes. Use high cutting speeds (250 to 500 m/min) combined with moderate feeds (0.15 to 0.40 mm/rev) to ensure clean chip evacuation without re-welding. To avoid radial distortion, clamping pressures must be balanced across pie-shaped jaws rather than concentrated three-point chuck pins. For deep boring, flood coolant or compressed air jets should be directed to the tool tip to prevent localized heat buildup.