Lab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft & 75Mm 4-Blade Propeller Overview
The Lab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft & 75Mm 4-Blade Propeller (LR500A) 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.
A 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.
Operating 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.
Key Features
- Wide speed range: adjustable from 34 to 340 rpm for low-shear blending through vigorous mixing.
- High torque output: up to 1.96 N·m (20 kgf·cm) handles high-viscosity samples without stalling.
- DC brushless motor: 70 W gearless direct drive with a ø10 mm shaft for quiet, low-maintenance operation.
- Speed feedback control: maintains the set speed automatically as sample viscosity changes during a run.
- Digital display: 3-digit speed readout with an LED torque and overload indicator.
- Built-in protection: overload stop, current-limit circuit, and thermal motor protection safeguard the drive.
How to Choose the Right Stirrer
Matching 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.
- Torque rating: high-viscosity slurries and gels demand strong torque; the LR500A delivers up to 1.96 N·m to resist stalling.
- Speed range: confirm the rpm band fits your protocol — this unit spans 34–340 rpm for both gentle and vigorous work.
- Control type: digital speed feedback holds rpm steady as viscosity shifts, which matters for reproducible mixing.
- Voltage: verify your circuit; the LR500A runs on 115V.
- Drive design: a gearless direct drive lowers noise and reduces mechanical wear over geared alternatives.
- Safety features: overload stop and thermal protection guard against motor damage during long or stalled runs.
Specifications
| Specification | Detail |
|---|---|
| Voltage | 115V |
| Speed Range | 34–340 rpm |
| Maximum Torque | 1.96 N·m (20 kgf·cm) |
| Motor | DC brushless, 70 W |
| Sample Viscosity | High |
| Type | Digital overhead laboratory stirrer |
| Speed Control | Speed feedback control — maintains set speed despite viscosity change |
| Display | Digital 3-digit speed display with LED torque/overload indicator |
| Safety Devices | Overload stop; current-limit circuit and thermal motor protection |
| Drive | Gearless direct drive, ø10 mm shaft |
| Included Accessories | Stirring shaft (ø10 × 500 mm), 75 mm 4-blade propeller, clamp |
Available Sizes and Configurations
| SKU | Configuration | Pack |
|---|---|---|
| LR-500A | SET | SET |
More in This Series
- Lab Stirrer Digital Main Body (100~1000 rpm), Stainless Shaft & 75mm 4-Blade Propeller
- LR-500A Set Main Body, Stand, Rod, Stainless Steel Shaft And 75mm 4-Blade Propeller
- LR-500B Set Main Body, Stand, Rod, Stainless Steel Shaft And 75mm 4-Blade Propeller
- LT-500A Set Main Body, Stand, Rod, Stainless Steel Shaft And 60mm 4-Blade Propeller
- LT-500B Set Main Body, Stand, Rod, Stainless Steel Shaft And 60mm 4-Blade Propeller
- Strong Magnetic Stirrer With Hot Plate, 50 To 1600 rpm
View all Laboratory Stirrers →
Why Buy From LabSupplies.com
LabSupplies.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.
- Authorized Yamato Scientific dealer: genuine equipment with full manufacturer warranty.
- In stock: ready to ship from USA inventory.
- Specialist support: dedicated lab-equipment experts answer technical questions.
Frequently Asked Questions
What is the speed range of the Yamato LR500A stirrer?
The LR500A operates from 34 to 340 rpm. Digital speed feedback control maintains the set speed even as sample viscosity changes during a run.
How much torque does the LR500A deliver?
The 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.
What voltage does the LR500A require?
The LR500A runs on 115V. Confirm your bench circuit matches before installation.
What accessories are included with the LR500A?
Each 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.
What safety features protect the LR500A motor?
The 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.
Does the LR500A have a digital display?
Yes, the LR500A features a 3-digit digital speed display. An accompanying LED indicator shows torque and overload status.
