{"product_id":"loctite-640-high-strength-retaining-compound-extended-positioning-time","title":"LOCTITE 640 High-Strength Retaining Compound – Extended Positioning Time","description":"\u003ch2\u003eHigh-strength retaining compound with extended positioning time\u003c\/h2\u003e\n\u003cp\u003eLOCTITE® 640 is a green, one-part anaerobic retaining compound for close-fitting cylindrical metal assemblies. Its low viscosity and slower cure provide additional positioning time for large-diameter components and active metals such as brass, while delivering high strength after cure.\u003c\/p\u003e\n\u003ch3\u003eKey benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExtended assembly time for positioning larger cylindrical components\u003c\/li\u003e\n\u003cli\u003eHigh-strength retention for slip fits and press fits\u003c\/li\u003e\n\u003cli\u003eLow-viscosity liquid flows into close-fitting joints\u003c\/li\u003e\n\u003cli\u003eService temperature range: -67°F to 347°F (-55°C to 175°C)\u003c\/li\u003e\n\u003cli\u003eTypical fixture time on steel: 2 hours\u003c\/li\u003e\n\u003cli\u003eFluoresces under UV light for inspection and quality control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRetaining bearings and helping prevent spin-out\u003c\/li\u003e\n\u003cli\u003eSecuring keys, splines, bushings, and sleeves\u003c\/li\u003e\n\u003cli\u003eRetaining rotors on motor shafts\u003c\/li\u003e\n\u003cli\u003eAugmenting press fits and restoring worn or out-of-tolerance assemblies\u003c\/li\u003e\n\u003cli\u003eEliminating backlash in cylindrical metal assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTechnology: acrylic\u003c\/li\u003e\n\u003cli\u003eChemical type: urethane methacrylate\u003c\/li\u003e\n\u003cli\u003eAppearance: green fluorescent liquid\u003c\/li\u003e\n\u003cli\u003eComponents: one part; no mixing required\u003c\/li\u003e\n\u003cli\u003eCure: anaerobic\u003c\/li\u003e\n\u003cli\u003eViscosity at 77°F (25°C): 450–750 mPa·s (cP)\u003c\/li\u003e\n\u003cli\u003eSpecific gravity at 77°F (25°C): approximately 1.2\u003c\/li\u003e\n\u003cli\u003eMaximum diametrical clearance: less than 0.004 in. (0.1 mm)\u003c\/li\u003e\n\u003cli\u003eTypical compressive shear strength after 24 hours at 72°F (22°C): 3,190 psi (22 N\/mm²), ISO 10123\u003c\/li\u003e\n\u003cli\u003eFull cure: typically 24 hours under suitable conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplication guidance\u003c\/h3\u003e\n\u003cp\u003eClean and dry both mating surfaces. Apply adhesive around the leading edge of the pin and inside the collar, then assemble with a rotating motion for complete coverage. For inactive metals, larger gaps, low temperatures, or unacceptably slow cure, use LOCTITE® SF 7471 or SF 7649 activator according to its instructions. Do not disturb parts until sufficient handling strength is reached.\u003c\/p\u003e\n\u003ch3\u003eStandards and limitations\u003c\/h3\u003e\n\u003cp\u003eNorth American production is tested to applicable requirements of Mil-R-46082B and ASTM D5363; confirm any required approval for the specific application. Do not use in pure oxygen or oxygen-rich systems or as a sealant for chlorine or other strong oxidizers. The product is not normally recommended for plastics, especially thermoplastics that may stress-crack; verify compatibility before use.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Loctite","offers":[{"title":"Fresh Material \/ 6 mL Tube","offer_id":48993351008510,"sku":"LT_640_6ML","price":16.0,"currency_code":"CAD","in_stock":true},{"title":"Short Shelf Life (1-3 Mths Left) \/ 6 mL Tube","offer_id":48993351041278,"sku":"SL_LT_640_6ML","price":13.0,"currency_code":"CAD","in_stock":false},{"title":"Recently Expired \/ 6 mL Tube","offer_id":48993351074046,"sku":"XP_LT_640_6ML","price":9.0,"currency_code":"CAD","in_stock":false},{"title":"Fresh Material \/ 36 mL Bottle","offer_id":48993351106814,"sku":"LT_640_36ML","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"Short Shelf Life (1-3 Mths Left) \/ 36 mL Bottle","offer_id":48993351139582,"sku":"SL_LT_640_36ML","price":27.0,"currency_code":"CAD","in_stock":false},{"title":"Recently Expired \/ 36 mL Bottle","offer_id":48993351172350,"sku":"XP_LT_640_36ML","price":19.0,"currency_code":"CAD","in_stock":false},{"title":"Fresh Material \/ 50 mL Bottle","offer_id":48993351205118,"sku":"LT_640_50ML","price":86.0,"currency_code":"CAD","in_stock":true},{"title":"Short Shelf Life (1-3 Mths Left) \/ 50 mL Bottle","offer_id":48993351237886,"sku":"SL_LT_640_50ML","price":64.0,"currency_code":"CAD","in_stock":false},{"title":"Recently Expired \/ 50 mL Bottle","offer_id":48993351270654,"sku":"XP_LT_640_50ML","price":43.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1212\/5762\/files\/loctite-640-retaining-compound-50ml.jpg?v=1789755638","url":"https:\/\/www.perigeedirect.com\/en-ca\/products\/loctite-640-high-strength-retaining-compound-extended-positioning-time","provider":"Perigee Direct","version":"1.0","type":"link"}