{"product_id":"tufnol-rod-srbf-phenolic-laminate-rod","title":"Tufnol Rod | 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 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. Larger diameters up to and beyond 100 mm are available on request.\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. To put this in perspective: a finished rod of 25 mm diameter will have started life at around 35 mm before being pressed down — an indication of just how densely consolidated the final material is. This process produces a material that 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\u003ePerformance: Why SRBF Outperforms Nylon Under Load\u003c\/h2\u003e\n\u003cp\u003eBecause of the layered, laminated construction — much like plywood — SRBF phenolic rod has an inherent rigidity that significantly reduces creep. Consider two flanges, one machined from nylon and one from SRBF rod, both bolted down with the same torque. Over time, the nylon flange will gradually loosen as the material creeps under load — the bolts on the SRBF side stay put. For any application where dimensional stability under sustained compressive force is critical, SRBF is the superior choice.\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\u003eGrade:\u003c\/strong\u003e Whale (medium weave cotton, general engineering)\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 like nylon and many other engineering plastics\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\u003eResistant to long-term immersion in water — does not degrade or absorb water at harmful levels\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 — ideal for water-lubricated marine bearings\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 (including water-lubricated marine bearings)\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\u003c\/li\u003e\n\u003cli\u003eOutdoor and aerospace structural parts requiring weather resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eLimitations \u0026amp; Unsuitable Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNot suitable for gears or washers — the laminated \"Swiss roll\" construction limits tooth and edge strength; a washer would simply push through the layers\u003c\/li\u003e\n\u003cli\u003eNot suitable for high-voltage electrical insulation 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 fine dust when machined — adequate extraction is recommended; prolonged drilling may cause localised melting and bit adhesion\u003c\/li\u003e\n\u003cli\u003eCannot be re-melted or thermoformed — all shaping must be done by machining\u003c\/li\u003e\n\u003cli\u003eDifficult to produce very intricate or delicate parts due to laminated construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMachining and Bonding\u003c\/h2\u003e\n\u003cp\u003eSRBF phenolic rod cannot be re-melted or thermoformed. All finished components must be produced by machining using saws, lathes, milling machines, drills or CNC centres. Dust extraction is recommended during all machining operations. For bonding, araldite, epoxy adhesives and contact adhesives all give good results with a variety of substrate materials.\u003c\/p\u003e\n\n\u003ch2\u003eDimensional Tolerances\u003c\/h2\u003e\n\u003cp\u003eManufacturers supply engineering plastic rod slightly oversize in diameter to allow customers to machine accurate finished dimensions and remove any minor surface imperfections.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 25.0 mm nominal diameter: +0.15 mm maximum deviation\u003c\/li\u003e\n\u003cli\u003e25.0–50.0 mm nominal diameter: +0.25 mm maximum deviation\u003c\/li\u003e\n\u003cli\u003e50.0–75.0 mm nominal diameter: +0.30 mm maximum deviation\u003c\/li\u003e\n\u003cli\u003e75.0–100.0 mm nominal diameter: +0.35 mm maximum deviation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAvailable Sizes\u003c\/h2\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","brand":"Plastics Co Uk","offers":[{"title":"90mm dia x 150mm","offer_id":57127616086396,"sku":null,"price":546.58,"currency_code":"GBP","in_stock":true},{"title":"90mm dia x 300mm","offer_id":57127616119164,"sku":null,"price":993.78,"currency_code":"GBP","in_stock":true},{"title":"90mm dia x 600mm","offer_id":57127616151932,"sku":null,"price":1892.93,"currency_code":"GBP","in_stock":true},{"title":"100mm dia x 150mm","offer_id":57127616184700,"sku":null,"price":654.1,"currency_code":"GBP","in_stock":true},{"title":"100mm dia x 300mm","offer_id":57127616217468,"sku":null,"price":1189.25,"currency_code":"GBP","in_stock":true},{"title":"100mm dia x 600mm","offer_id":57127616250236,"sku":null,"price":2265.25,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/9262\/2987\/files\/Tuffnolrod.png?v=1782903313","url":"https:\/\/plasticsco.co.uk\/products\/tufnol-rod-srbf-phenolic-laminate-rod","provider":"Plastics Co Uk","version":"1.0","type":"link"}