{"product_id":"srbf-cotton-fabric-phenolic-resin-laminate-rod-high-strength-engineering-insulation-bar","title":"SRBF Cotton Fabric Phenolic Resin Laminate Rod – High Strength Engineering Insulation Bar","description":"\u003ch2\u003eSRBF Cotton Fabric Phenolic Resin Laminate Rod\u003c\/h2\u003e\n\u003cp\u003eOur \u003cstrong\u003eSRBF (Synthetic Resin Bonded Fabric) cotton phenolic laminate rod\u003c\/strong\u003e is a premium-grade engineering insulation bar manufactured from medium-weave cotton fabric pre-impregnated with phenolic resin, then compressed under extreme pressure and heat-cured to produce an exceptionally rigid, strong and dimensionally stable round bar. Available in two diameters (90 mm and 100 mm) and three standard lengths (150 mm, 300 mm and 600 mm), this versatile material is ideal for a broad range of mechanical and low-voltage electrical engineering applications.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is SRBF Phenolic Cotton Laminate Rod?\u003c\/h2\u003e\n\u003cp\u003eSRBF phenolic cotton rod is a thermoset composite material. Cotton fabric sheets are pre-soaked in phenolic resin, then tightly wound and layered until the desired diameter is reached. The resulting billet is placed in a rod mould and hot-pressed under up to three tonnes of pressure before being fully cured. This process produces a material that, like plywood, is highly rigid across the grain — approximately twice the stiffness of nylon — giving it superior resistance to creep under sustained mechanical load.\u003c\/p\u003e\n\n\u003ch2\u003eKey Properties \u0026amp; Technical Data\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial designation:\u003c\/strong\u003e SRBF – Synthetic Resin Bonded Fabric\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Brown \/ light tan\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDensity:\u003c\/strong\u003e 1.35 g\/cm³ (rod)\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eTensile strength:\u003c\/strong\u003e 68 MPa\u003c\/li\u003e\n            \u003cli\u003e\n\u003cstrong\u003eCross-breaking strength:\u003c\/strong\u003e 130 MPa\u003c\/li\u003e\n              \u003cli\u003e\n\u003cstrong\u003eCompressive strength (flatwise):\u003c\/strong\u003e 310 MPa\u003c\/li\u003e\n                \u003cli\u003e\n\u003cstrong\u003eCompressive strength (edgewise):\u003c\/strong\u003e 200 MPa\u003c\/li\u003e\n                  \u003cli\u003e\n\u003cstrong\u003eMaximum working temperature (continuous):\u003c\/strong\u003e 120 °C\u003c\/li\u003e\n                    \u003cli\u003e\n\u003cstrong\u003eMaximum working temperature (intermittent):\u003c\/strong\u003e 130 °C\u003c\/li\u003e\n                      \u003cli\u003e\n\u003cstrong\u003eSpecific heat:\u003c\/strong\u003e 1.5 kJ\/kg·K\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately one-fifth the weight of steel; half the weight of aluminium\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAdvantages of SRBF Phenolic Laminate Rod\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eHigh rigidity and strength combined with low weight\u003c\/li\u003e\n      \u003cli\u003eExcellent electrical insulation at low voltages\u003c\/li\u003e\n        \u003cli\u003eGood thermal insulation properties\u003c\/li\u003e\n          \u003cli\u003eMaximum working temperature of 120–130 °C — higher than nylon\u003c\/li\u003e\n            \u003cli\u003eDoes not degrade or creep at elevated temperatures the way nylon and many other engineering plastics do\u003c\/li\u003e\n              \u003cli\u003eNon-corrosive; can reduce corrosion in adjacent metal parts\u003c\/li\u003e\n                \u003cli\u003eExcellent resistance to sustained compressive loads with minimal creep\u003c\/li\u003e\n                  \u003cli\u003eOutstanding weather resistance — suitable for outdoor, marine and aerospace environments\u003c\/li\u003e\n                    \u003cli\u003eGood resistance to chemicals, oils, solvents and hydrocarbons\u003c\/li\u003e\n                      \u003cli\u003eCan be lubricated with water, oil or grease, or run completely dry\u003c\/li\u003e\n    \u003cli\u003eExcellent wear resistance and toughness for friction-bearing applications\u003c\/li\u003e\n    \u003cli\u003eEasily machined on conventional machine tools (lathes, mills, drills, CNC)\u003c\/li\u003e\n    \u003cli\u003eCan be bonded with araldite, epoxy or contact adhesives\u003c\/li\u003e\n\u003c\/ul\u003e\n\n  \u003ch2\u003eTypical Applications\u003c\/h2\u003e\n  \u003cp\u003eSRBF phenolic cotton rod is widely used across mechanical engineering, electrical engineering, marine, rail and aerospace industries. Typical applications include:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eBearings and plain bushes\u003c\/li\u003e\n    \u003cli\u003eSpacers and distance pieces\u003c\/li\u003e\n    \u003cli\u003eRollers and guides\u003c\/li\u003e\n    \u003cli\u003eJigs and fixtures\u003c\/li\u003e\n    \u003cli\u003eWear-resistant components\u003c\/li\u003e\n    \u003cli\u003eLow-voltage electrical insulation components\u003c\/li\u003e\n    \u003cli\u003eStructural non-metallic parts requiring high stiffness\u003c\/li\u003e\n    \u003cli\u003eMarine and offshore components (water-lubricated bearings)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eLimitations \u0026amp; What This Material Should Not Be Used For\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNot suitable for gears or washers — the laminated construction limits tooth and edge strength\u003c\/li\u003e\n    \u003cli\u003eNot suitable for high-voltage electrical insulation applications or circuit board components\u003c\/li\u003e\n    \u003cli\u003eNot approved for direct food contact applications\u003c\/li\u003e\n    \u003cli\u003eConcentrated acids and alkalis will attack the laminate\u003c\/li\u003e\n    \u003cli\u003eProduces dust when machined; prolonged drilling may cause localised melting on the drill bit\u003c\/li\u003e\n    \u003cli\u003eDelicate or intricate machined parts may be subject to delamination shearing\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eMachining \u0026amp; Fabrication\u003c\/h2\u003e\n  \u003cp\u003eSRBF phenolic rod cannot be re-melted or thermoformed. All finished components must be produced by machining. It cuts cleanly on saws, lathes, milling machines, drill presses and high-speed CNC centres. Adequate dust extraction is recommended during machining. When drilling at depth, use appropriate speeds and feeds to avoid heat build-up.\u003c\/p\u003e\n\n  \u003ch2\u003eDimensional Tolerances\u003c\/h2\u003e\n  \u003cp\u003eManufacturers supply SRBF rod slightly oversize on diameter to allow finishing to final dimensions. Standard diameter tolerances for this material are:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eNominal diameter up to 25.0 mm: +0.15 mm maximum deviation\u003c\/li\u003e\n    \u003cli\u003eNominal diameter 25.0–50.0 mm: +0.25 mm maximum deviation\u003c\/li\u003e\n    \u003cli\u003eNominal diameter 50.0–75.0 mm: +0.30 mm maximum deviation\u003c\/li\u003e\n    \u003cli\u003eNominal diameter 75.0–100.0 mm: +0.35 mm maximum deviation\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAvailable Sizes\u003c\/h2\u003e\n  \u003cp\u003eThis listing covers the following standard diameter and length combinations:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e90 mm diameter × 150 mm length\u003c\/li\u003e\n    \u003cli\u003e90 mm diameter × 300 mm length\u003c\/li\u003e\n    \u003cli\u003e90 mm diameter × 600 mm length\u003c\/li\u003e\n    \u003cli\u003e100 mm diameter × 150 mm length\u003c\/li\u003e\n    \u003cli\u003e100 mm diameter × 300 mm length\u003c\/li\u003e\n    \u003cli\u003e100 mm diameter × 600 mm length\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eLarger diameters and custom lengths are available — please contact our sales team for a quotation.\u003c\/p\u003e\n\n  \u003ch2\u003eWhy Choose SRBF Phenolic Cotton Laminate Rod?\u003c\/h2\u003e\n  \u003cp\u003eThis material is a tried-and-tested non-metallic engineering solution with decades of proven performance in demanding environments. It is hard, rigid and strong, yet lightweight (approximately one-fifth the weight of steel and half the weight of aluminium). Its excellent wear resistance, dimensional stability and ability to operate without conventional lubrication make it particularly valuable in marine, rail and general mechanical engineering contexts where metals would corrode or heavier materials would add excessive weight.\u003c\/p\u003e","brand":"Plastics Co Uk","offers":[{"title":"90mm dia x 150mm","offer_id":57127597867388,"sku":null,"price":218.63,"currency_code":"GBP","in_stock":false},{"title":"90mm dia x 300mm","offer_id":57127597900156,"sku":null,"price":397.51,"currency_code":"GBP","in_stock":false},{"title":"90mm dia x 600mm","offer_id":57127597932924,"sku":null,"price":757.17,"currency_code":"GBP","in_stock":false},{"title":"100mm dia x 150mm","offer_id":57127597965692,"sku":null,"price":261.64,"currency_code":"GBP","in_stock":false},{"title":"100mm dia x 300mm","offer_id":57127597998460,"sku":null,"price":475.7,"currency_code":"GBP","in_stock":false},{"title":"100mm dia x 600mm","offer_id":57127598031228,"sku":null,"price":906.1,"currency_code":"GBP","in_stock":false}],"url":"https:\/\/plasticsco.co.uk\/products\/srbf-cotton-fabric-phenolic-resin-laminate-rod-high-strength-engineering-insulation-bar","provider":"Plastics Co Uk","version":"1.0","type":"link"}