{"product_id":"lab-stirrer-digital-main-body-34-340-rpm-stainless-shaft-75mm-4-blade-propeller-lr-500a","title":"Yamato LR500A Lab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft \u0026 75Mm 4-Blade Propeller","description":"\u003ch2\u003eLab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft \u0026amp; 75Mm 4-Blade Propeller Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft \u0026amp; 75Mm 4-Blade Propeller (LR500A)\u003c\/strong\u003e from Yamato Scientific is a digital overhead laboratory stirrer engineered for high-viscosity samples across a 34–340 rpm speed range. Sold by LabSupplies.com, authorized dealer, this unit delivers up to 1.96 N·m (20 kgf·cm) of torque for demanding mixing work.\u003c\/p\u003e\n\u003cp\u003eA DC brushless 70 W motor pairs with a gearless direct drive and a ø10 mm shaft, reducing mechanical wear and quieting operation. Speed feedback control holds the set rpm even as sample viscosity shifts. Each unit ships with a ø10 × 500 mm stainless stirring shaft, a 75 mm 4-blade propeller, and a clamp.\u003c\/p\u003e\n\u003cp\u003eOperating on 115V, the LR500A presents a 3-digit digital speed display with an LED torque and overload indicator for at-a-glance feedback. Overload stop, a current-limit circuit, and thermal motor protection guard the drive during extended runs. The unit ships from USA inventory through LabSupplies.com.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide speed range:\u003c\/strong\u003e adjustable from 34 to 340 rpm for low-shear blending through vigorous mixing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh torque output:\u003c\/strong\u003e up to 1.96 N·m (20 kgf·cm) handles high-viscosity samples without stalling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC brushless motor:\u003c\/strong\u003e 70 W gearless direct drive with a ø10 mm shaft for quiet, low-maintenance operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed feedback control:\u003c\/strong\u003e maintains the set speed automatically as sample viscosity changes during a run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital display:\u003c\/strong\u003e 3-digit speed readout with an LED torque and overload indicator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in protection:\u003c\/strong\u003e overload stop, current-limit circuit, and thermal motor protection safeguard the drive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to Choose the Right Stirrer\u003c\/h2\u003e\n\u003cp\u003eMatching an overhead stirrer to your workflow comes down to torque, speed, and how the unit holds its setpoint under load. Review the axes below against your typical sample and site power before specifying.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque rating:\u003c\/strong\u003e high-viscosity slurries and gels demand strong torque; the LR500A delivers up to 1.96 N·m to resist stalling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed range:\u003c\/strong\u003e confirm the rpm band fits your protocol — this unit spans 34–340 rpm for both gentle and vigorous work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl type:\u003c\/strong\u003e digital speed feedback holds rpm steady as viscosity shifts, which matters for reproducible mixing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e verify your circuit; the LR500A runs on 115V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive design:\u003c\/strong\u003e a gearless direct drive lowers noise and reduces mechanical wear over geared alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety features:\u003c\/strong\u003e overload stop and thermal protection guard against motor damage during long or stalled runs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e115V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Range\u003c\/td\u003e\n\u003ctd\u003e34–340 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Torque\u003c\/td\u003e\n\u003ctd\u003e1.96 N·m (20 kgf·cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003eDC brushless, 70 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSample Viscosity\u003c\/td\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDigital overhead laboratory stirrer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Control\u003c\/td\u003e\n\u003ctd\u003eSpeed feedback control — maintains set speed despite viscosity change\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eDigital 3-digit speed display with LED torque\/overload indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Devices\u003c\/td\u003e\n\u003ctd\u003eOverload stop; current-limit circuit and thermal motor protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003eGearless direct drive, ø10 mm shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Accessories\u003c\/td\u003e\n\u003ctd\u003eStirring shaft (ø10 × 500 mm), 75 mm 4-blade propeller, clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eAvailable Sizes and Configurations\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLR-500A\u003c\/td\u003e\n\u003ctd\u003eSET\u003c\/td\u003e\n\u003ctd\u003eSET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eMore in This Series\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lab-stirrer-digital-main-body-100-1000-rpm-stainless-shaft-75mm-4-blade-propeller-lr-500b\"\u003eLab Stirrer Digital Main Body (100~1000 rpm), Stainless Shaft \u0026amp; 75mm 4-Blade Propeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lr-500a-set-main-body-stand-rod-stainless-steel-shaft-and-75mm-4-blade-propeller-lr-500aa\"\u003eLR-500A Set Main Body, Stand, Rod, Stainless Steel Shaft And 75mm 4-Blade Propeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lr-500b-set-main-body-stand-rod-stainless-steel-shaft-and-75mm-4-blade-propeller-lr-500ba\"\u003eLR-500B Set Main Body, Stand, Rod, Stainless Steel Shaft And 75mm 4-Blade Propeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lt-500a-set-main-body-stand-rod-stainless-steel-shaft-and-60mm-4-blade-propeller-lt-500aa\"\u003eLT-500A Set Main Body, Stand, Rod, Stainless Steel Shaft And 60mm 4-Blade Propeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lt-500b-set-main-body-stand-rod-stainless-steel-shaft-and-60mm-4-blade-propeller-lt-500ba\"\u003eLT-500B Set Main Body, Stand, Rod, Stainless Steel Shaft And 60mm 4-Blade Propeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/strong-magnetic-stirrer-with-hot-plate-50-to-1600-rpm-mfh-800\"\u003eStrong Magnetic Stirrer With Hot Plate, 50 To 1600 rpm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/laboratory-stirrers\"\u003eView all Laboratory Stirrers →\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eWhy Buy From LabSupplies.com\u003c\/h2\u003e\n\u003cp\u003eLabSupplies.com is an authorized Yamato Scientific dealer, so every LR500A ships as a genuine unit backed by the manufacturer warranty. Order directly and our lab-equipment specialists stand ready for any spec questions before you commit.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Yamato Scientific dealer:\u003c\/strong\u003e genuine equipment with full manufacturer warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn stock:\u003c\/strong\u003e ready to ship from USA inventory.\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eSpecialist support:\u003c\/strong\u003e dedicated lab-equipment experts answer technical questions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the speed range of the Yamato LR500A stirrer?\u003c\/h3\u003e\u003cp\u003eThe LR500A operates from 34 to 340 rpm. Digital speed feedback control maintains the set speed even as sample viscosity changes during a run.\u003c\/p\u003e\n\u003ch3\u003eHow much torque does the LR500A deliver?\u003c\/h3\u003e\u003cp\u003eThe LR500A delivers up to 1.96 N·m (20 kgf·cm) of maximum torque. This output handles high-viscosity samples driven by a 70 W DC brushless motor.\u003c\/p\u003e\n\u003ch3\u003eWhat voltage does the LR500A require?\u003c\/h3\u003e\u003cp\u003eThe LR500A runs on 115V. Confirm your bench circuit matches before installation.\u003c\/p\u003e\n\u003ch3\u003eWhat accessories are included with the LR500A?\u003c\/h3\u003e\u003cp\u003eEach LR500A set includes a stirring shaft (ø10 × 500 mm), a 75 mm 4-blade propeller, and a clamp. The unit uses a gearless direct drive with a ø10 mm shaft.\u003c\/p\u003e\n\u003ch3\u003eWhat safety features protect the LR500A motor?\u003c\/h3\u003e\u003cp\u003eThe LR500A includes an overload stop, a current-limit circuit, and thermal motor protection. An LED torque and overload indicator provides at-a-glance feedback during operation.\u003c\/p\u003e\n\u003ch3\u003eDoes the LR500A have a digital display?\u003c\/h3\u003e\u003cp\u003eYes, the LR500A features a 3-digit digital speed display. An accompanying LED indicator shows torque and overload status.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/labsupplies.com\/products\/lab-stirrer-digital-main-body-34-340-rpm-stainless-shaft-75mm-4-blade-propeller-lr-500a#product\",\n      \"name\": \"Yamato LR500A Lab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft \u0026 75mm 4-Blade Propeller\",\n      \"sku\": \"LR-500A\",\n      \"mpn\": \"LR-500A\",\n      \"brand\": {\n        \"@type\": \"Brand\",\n        \"name\": \"Yamato Scientific\"\n      },\n      \"manufacturer\": {\n        \"@type\": \"Organization\",\n        \"name\": \"Yamato Scientific\"\n      },\n      \"url\": \"https:\/\/labsupplies.com\/products\/lab-stirrer-digital-main-body-34-340-rpm-stainless-shaft-75mm-4-blade-propeller-lr-500a\",\n      \"dateModified\": \"2026-06-29\",\n      \"offers\": {\n        \"@type\": \"Offer\",\n        \"priceCurrency\": \"USD\",\n        \"price\": \"2695.00\",\n        \"availability\": \"https:\/\/schema.org\/InStock\",\n        \"url\": \"https:\/\/labsupplies.com\/products\/lab-stirrer-digital-main-body-34-340-rpm-stainless-shaft-75mm-4-blade-propeller-lr-500a\",\n        \"seller\": {\n          \"@type\": \"Organization\",\n          \"name\": \"LabSupplies.com\"\n        }\n      },\n      \"image\": \"https:\/\/dl.dropboxusercontent.com\/scl\/fo\/02jn6wbbh1yhzaqkcyplw\/h\/LR500.png?rlkey=wtjo5lqeg5sku9a3506qrpssx\",\n      \"description\": \"Yamato LR500A overhead stirrer: 34–340 rpm, 1.96 N·m torque, 115V digital speed feedback control. 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